BMW Cooling System Parts & Accessories for BMW 3 Series E91 (2006-2012)

Water Pump And Thermostat Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:5376274

Part#: 11517586925TKT

In Stock

Sale - Save 25% $ 448.99

This product was last offered at the strikethrough price on
05-03-2026

$ 338.61 USD

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Qty

Sale - Save 25%

$ 448.99

This product was last offered at the strikethrough price on
05-03-2026

$ 338.61 USD

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Everything you need to replace your water pump and thermostat. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Kit includes: Mahle-Behr thermostat Water pump Genuine BMW coolant thermostat to water pump hose Mounting hardware required for both the thermostat and water pump

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E9X 325i/330i 6MT Cooling Overhaul Package

10X Entries Into Our F80 M3 Sweepstakes

T#:340246

Part#: TMS214376

Ships in 1 Business Day

Sale - Save 24% $ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.78 USD

Add to Wish List

Sale - Save 24%

$ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.78 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 325/330's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 325/330. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, cooling hoses, and the BMW antifreeze. This package fits 325/330 with N52 engine and manual transmission.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Coolant Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 325/330 water hoses during this job (see diagram):

17127531579, upper radiator hose (A)
17127531581, lower radiator hose (B)
11537552396, water pump to engine �
11537545890, thermostat to cylinder head (includes new o-ring) (D)
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 325/330 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the E90 325/330 - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and a manual transmission:
2006-2006 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2006 E91 BMW 325xi - Wagon

Click on the options for your kit below and then click "update price" for your kit total.

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E9X 325i/330i Auto Cooling Overhaul Package

10X Entries Into Our F80 M3 Sweepstakes

T#:340245

Part#: TMS214380

Ships in 1 Business Day

Sale - Save 24% $ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.78 USD

Add to Wish List

Sale - Save 24%

$ 426.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 322.78 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 325/330's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 325/330i. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 325/330 cooling hoses, and the BMW antifreeze. This package fits 325i/330i/xi with N52 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 325/330 water hoses during this job (see diagram):

17127531579, upper radiator hose
17127531581, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 325/330 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the E90 325/330 - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and an auto transmission:
2006-2006 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2006 E91 BMW 325xi - Wagon

Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

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Basic Cooling System Service Kit - E9X 328i/xi w/ Manual Transmission...

10X Entries Into Our F80 M3 Sweepstakes

T#:557224

Part#: E9X328MBCKT

In Stock

Sale - Save 21% $ 816.12

This product was last offered at the strikethrough price on
09-09-2026

$ 646.08 USD

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Qty

Sale - Save 21%

$ 816.12

This product was last offered at the strikethrough price on
09-09-2026

$ 646.08 USD

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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Basic Cooling System Service Kit - E9X 328i/xi N52 3.0L w/ Auto Trans...

10X Entries Into Our F80 M3 Sweepstakes

T#:557241

Part#: E9X328BCKT

In Stock

Sale - Save 20% $ 849.99

This product was last offered at the strikethrough price on
09-14-2026

$ 678.63 USD

Add to Wish List

Qty

Sale - Save 20%

$ 849.99

This product was last offered at the strikethrough price on
09-14-2026

$ 678.63 USD

Add to Wish List

Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

Show More Show Less

E82 128i, E9X 328i Auto Cooling Overhaul Package

10X Entries Into Our F80 M3 Sweepstakes

T#:340251

Part#: TMS214378

Ships in 1 Business Day

Sale - Save 14% $ 621.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 533.76 USD

Add to Wish List

Sale - Save 14%

$ 621.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 533.76 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 328's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 328i. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 328 cooling hoses, and the BMW antifreeze. This package fits 328i/328xi with N52 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 water hoses during this job (see diagram):

17127531579, upper radiator hose
17127564478, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and an auto transmission:
2008-2012 E82 BMW 128i
2007-2011 E90 BMW 328i 328xi 328i xDrive - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive - Coupe
2007-2013 E93 BMW 328i - Convertible
Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

Show More Show Less

E82 128i N51 SULEV, E9X 328i N51 SULEV Auto Cooling Overhaul Package ...

10X Entries Into Our F80 M3 Sweepstakes

T#:340253

Part#: TMS215325

Ships in 1 Business Day

Sale - Save 5% $ 1,280.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 1,216.77 USD

Add to Wish List

Sale - Save 5%

$ 1,280.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 1,216.77 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 328 SULEV's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N51 328i SULEV. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, all of the 328 SULEV cooling hoses, and the BMW antifreeze. This package fits 128i/328i SULEV with N51 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N51 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Cooling Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 SULEV water hoses during this job (see diagram):

17127531579, upper radiator hose
17127531581, lower radiator hose
11537613176, water pump to engine
11537534880, gasket for #176 hose
11537545890, thermostat to cylinder head (includes new o-ring)
17117524710, radiator to auto trans cooler
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 SULEV is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the 328 SULEV - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N51 engine and an auto transmission:
2008-2012 E82 BMW 128i SULEV
2007-2011 E90 BMW 328i 328xi 328i xDrive SULEV - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive SULEV - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive SULEV - Coupe
2007-2013 E93 BMW 328i SULEV - Convertible
Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

Show More Show Less

E82 128i N51 SULEV, E9X 328i N51 SULEV 6MT Cooling Overhaul Package ...

10X Entries Into Our F80 M3 Sweepstakes

T#:340254

Part#: TMS215326

Ships in 1 Business Day

Starting at $ 1,233.77 USD

Add to Wish List

Starting at $ 1,233.77 USD

Add to Wish List

This cooling overhaul will cover just about everything you could replace on the 328 SULEV's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N51 328 SULEV. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, cooling hoses, and the BMW antifreeze. This package fits 128/328 SULEV with N51 engine and manual transmission.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .

Base Cooling Overhaul Package - Water Pump and Thermostat

(click to expand)

Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N51 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.

Coolant Hoses

(click to expand)

With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 328 SULEV water hoses during this job (see diagram):

17127531579, upper radiator hose (A)
17127531581, lower radiator hose (B)
11537545890, thermostat to cylinder head (includes new o-ring) (D)
There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).

Expansion Tank Options

(click to expand)

The expansion tank on the 328 SULEV is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.

Coolant Temp Sensors

(click to expand)

There are two coolant temp sensors on the 328 SULEV - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N51 engine and a manual transmission:
2008-2012 E82 BMW 128i SULEV
2007-2011 E90 BMW 328i 328xi 328i xDrive SULEV - Sedan
2007-2012 E91 BMW 328i 328xi 328i xDrive SULEV - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive SULEV - Coupe
2007-2013 E93 BMW 328i SULEV - Convertible
Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.

Click on the options for your kit below and then click "update price" for your kit total.

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CSF OE Style Radiator - E82/88 E9X Z4

2X Entries Into Our F80 M3 Sweepstakes

T#:638781

Part#: 3718

In Stock

$ 138.99 USD

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$ 138.99 USD

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CSF radiators are designed and built to High-Performance Standards & sold worldwide for over 50 years - over 30 Million Units Sold! CSF's radiators are carefully engineered and Wind Tunnel tested for Cooling Performance Validation. CSF has over 10,000 different models of radiators that they manufacture and supply for all the leading brands of vehicles on the road.

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CSF High Performance Aluminum Radiator - E9x 325i 328i 330i N52 ...

2X Entries Into Our F80 M3 Sweepstakes

T#:384651

Part#: 7001

In Stock

Sale - Save 10% $ 535.00

This product was last offered at the strikethrough price on
10-04-2026

$ 481.50 USD

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Qty

Sale - Save 10%

$ 535.00

This product was last offered at the strikethrough price on
10-04-2026

$ 481.50 USD

Add to Wish List

CSF is one of the premier cooling product specialists available on the market thanks to designs such as their High Performance Aluminum Radiators. Using a single pass designed core, this radiator gives you all the cooling you could ever need. Paired with these radiators are CNC machined brackets and corrosion resistant hardware that allow final installation to have a same as stock fitment! This enables you to have much higher cooling without having to cut away any metal or delete any important components just for the sake of lower coolant temperatures.

Features:

Two-row, triple-pass design radiator core
CNC machined mounting brackets
All needed hardware included
Hand polished aluminum with a mirror-like finish
Stock fitment prevents modification to engine bay

Fits the following BMWs:
2006-2012 E9X BMW 325i 328i 330i

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CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

2X Entries Into Our F80 M3 Sweepstakes
Universal fitment design - modifications may be necessary to run this cooler

T#:53608839

Part#: 8371

Ships in 4 Business Days

$ 499.00 USD

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$ 499.00 USD

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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.

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BMW Cooling System Parts & Accessories for BMW 3 Series E91 (2006-2012)

Sub-Categories

Water Pump And Thermostat Kit

E9X 325i/330i 6MT Cooling Overhaul Package

E9X 325i/330i Auto Cooling Overhaul Package

Basic Cooling System Service Kit - E9X 328i/xi w/ Manual Transmission...

Basic Cooling System Service Kit - E9X 328i/xi N52 3.0L w/ Auto Trans...

E82 128i, E9X 328i Auto Cooling Overhaul Package

E82 128i N51 SULEV, E9X 328i N51 SULEV Auto Cooling Overhaul Package ...

E82 128i N51 SULEV, E9X 328i N51 SULEV 6MT Cooling Overhaul Package ...

CSF OE Style Radiator - E82/88 E9X Z4

CSF High Performance Aluminum Radiator - E9x 325i 328i 330i N52 ...

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

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