BMW Mass Air Sensor & Air Flow Meters for BMW 5 Series E39 (1996-2003)

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We sell OEM air mass sensors, air flow meters, and HFMs (Hot Film Meter) for many BMWs. When the mass air sensor is bad you will notice your engine running out of tune. Your fuel mileage will suffer, throttle response will be poor, and you will notice a lack of power.

There should be a Check Engine Light to alert you that the air sensor is having problems. However, there may not be a fault code for the air meter itself. Often times the code comes up as fuel trim or lean condition. In these cases the air sensor could be just one of a number of potential problems.

We only sell air sensors from Original Equipment Manufacturers like, Bosch, VDO, and Siemens. Please note that HFMs are an electrical part and cannot be returned for refund.

Turner Plug-and-Play IAT Relocation Kit
Turner Plug-and-Play IAT Relocation Kit
All vehicles will lose some degree of performance due to ...
Turner Motorsport - Corporate Logo
T#:391751
Part#: 014579TMS
In Stock
Starting at $115.95
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Starting at $115.95
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All vehicles will lose some degree of performance due to heat soak under the right operating conditions. Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF canaEURtmt shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do? Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly. The result is youaEURtmll experience reduced torque loss and more consistent power output when youaEURtmre pushing your engine hard.

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place.

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF.

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up

HFM/Mass Air Sensor for M52 Engine (E36, E39)
HFM/Mass Air Sensor for M52 Engine (E36, E39)
Replacement mass air sensor for M52, S52-US engines. This...
Turner Motorsport - Corporate Logo
T#:338007
Part#: TMS338007
Ships in 2 Days
Starting at $318.45
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Starting at $318.45
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Replacement mass air sensor for M52, S52-US engines. This HFM is an OEM part, made by Siemens VDO. 3.0" diameter.The M52 engines in the E36 and E39 have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems. We also sell HFM sensor cleaner that may clear your problem (see below).Complete your repair with a new boot and new clamps by selecting the option below. Boots are OE-spec or Original BMW and we use high-quality factory-style clamps. Complete Application List:
1996-99 E36 323is, 323iC, 328i, 328is, 328iC
1996-99 E36 M3 3.2-liter
1997-98 E39 528i
OEM VDO HFM/Mass Air Sensor -- M52TU, M54 Engine (E46, E39, Z3)
OEM VDO HFM/Mass Air Sensor -- M52TU, M54 Engine (E46, E39, Z3) ...
Replacement mass air sensor for M52TU 2.5/2.8 and M54 2.5...
VDO - Corporate Logo
T#:2011
Part#: 13621432356
In Stock
$169.99
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Replacement mass air sensor for M52TU 2.5/2.8 and M54 2.5 engines. 3.0" diameter.

The mass air sensor/meter measures the volume of air being fed into the engine so that the fuel levels can be adjust for optimal performance. A faulty sensor can lead to improper fuel mixture and rough idle and poor performance and gas mileage. Replace your faulty sensor with a high quality OEM VDO sensor to restore normal operation.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Complete Application List:

1999-2000 E46 323i, 323Ci, 328i, 328Ci
2001-2002 E46 325i, 325Ci (M54 engine)
1999-2000 E39 528i
2000-2003 E39 525i
1999-2000 Z3 2.3, Z3 2.8


OEM Bosch HFM/Mass Air Sensor - E39 M5, Z8
OEM Bosch HFM/Mass Air Sensor - E39 M5, Z8
Replacement OEM Bosch mass air sensor (HFM) for E39 M5 an...
Bosch - Corporate Logo
T#:5508
Part#: 13621433566
In Stock
$133.95
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Replacement OEM Bosch mass air sensor (HFM) for E39 M5 and Z8 with S62 engine.

This item fits the following BMWs:
1999-2003 E39 BMW M5
2000-2003 E52 BMW Z8 Roadster

OEM Bosch Mass Air Flow Sensor (MAF) -- BMW M62
OEM Bosch Mass Air Flow Sensor (MAF) -- BMW M62
The mass air flow sensor measures the amount of air flow ...
Bosch - Corporate Logo
T#:369424
Part#: 13621433567
In Stock
$144.95
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The mass air flow sensor measures the amount of air flow to tell the computer how much fuel to add to the mixture. If the MAF sensor malfunctions, there could be too much or too little fuel added to the mixture. Restore performance and fuel mileage with a high quality Bosch replacement. OEM replacement for BMW part # 13621433567 for M62 engines. For vehicles with a production date from 09/1998.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Fits the following vehicles:
09/1998+ E39 BMW 540i
09/1998+ E38 BMW 740i/iL
09/1998+ E53 BMW X5 4.4i 4.6is
09/1998+ E52 BMW Z8

OEM VDO Mass Airflow Sensor for Early M54 3.0-liter Engine (E46, E39, Z4)
OEM VDO Mass Airflow Sensor for Early M54 3.0-liter Engine (E46, E39...
Replacement mass air sensor for the early M54 3.0-liter E...
VDO - Corporate Logo
T#:338009
Part#: 13627567451
In Stock
Starting at $196.25
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Starting at $196.25
Free Shipping

Replacement mass air sensor for the early M54 3.0-liter Engine. See application list below. 3.5" diameter.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Complete Application List:

2001-2002 E46 330i, 330Ci
2001-2005 E46 330Xi
2001-2003 E39 530i
2001-2006 E53 X5 3.0
2001-2002 Z3 3.0


Mass Air Flow Sensor (MAF)
Bremi - Corporate Logo
T#:556950
Part#: 13621703275
In Stock
New Item
$120.93
$120.93
OEM VDO HFM/Mass Air Sensor -- Early M54 3.0-liter Engine (E46, E39, Z4)
OEM VDO HFM/Mass Air Sensor -- Early M54 3.0-liter Engine (E46, E39,...
This is a high quality replacment OEM VDO Mass Air Sensor...
VDO - Corporate Logo
T#:1416
Part#: 13627567451
In Stock
$196.25
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This is a high quality replacment OEM VDO Mass Air Sensor.The MAF controls the amount of fuel that goes through the injectors based on the volume of air coming through the intake. If your vehicle is giving you a MAF code, replace it immediately to ensure you get the best gas mileage and performance. It is common for this part to fail slowly and cause poor fuel mileage and hampered performance. When it fails completely, the vehicle will stutter and stall as it falls into a limp mode. One way to check if your MAF is bad is to unplug the connector before starting your car. If it idles well (compared to a previous poor idle), your MAF needs replaced. If you let this maintenance part go, your fuel economy will suffer as too much fuel is going into the engine and not being burned. A great way to give your vehicle an efficiency boost.

OEM replacement for BMW part # 13627567451 and 13621438871

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Intrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Complete Application List:
2001-2002 E46 330i, 330Ci
2001-2005 E46 330Xi
2001-2003 E39 530i
2001-2006 E53 X5 3.0
2001-2002 Z3 3.0


OEM Bosch HFM/Mass Air Sensor - E32, E34, E38, E39 with M60/M62 4.0-liter Engine
OEM Bosch HFM/Mass Air Sensor - E32, E34, E38, E39 with M60/M62 4.0-...
The mass air flow sensor measures the amount of air flow ...
Bosch - Corporate Logo
T#:6055
Part#: 13621702078
In Stock
$200.95
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The mass air flow sensor measures the amount of air flow to tell the computer how much fuel to add to the mixture. If the MAF sensor malfunctions, there could be too much or too little fuel added to the mixture. Restore performance and fuel mileage with a high quality Bosch ( #0 280 217 800) replacement. OEM replacement for BMW part # 13621702078 and 13621468625. For vehicles with a production date up to 09/1998. This sensor is also known as the "540 HFM" that is used in a variety of OBD-1 E36 M3 upgrades.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Replacement mass air sensor for the M60/M62 engine. The M60 engines have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems.

This replacement HFM fits the following BMWs:
1993-1995 E34 BMW 540i
1997-1998 E39 BMW 540i
1988-1994 E32 BMW 740i 740il
1995-1998 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci


OEM Hella HFM/Mass Air Sensor - E38 E39, X5 with M62 V8 Engine
OEM Hella HFM/Mass Air Sensor - E38 E39, X5 with M62 V8 Engine ...
OEM Hella Replacement mass air sensor for the 1999+ M62 e...
Hella - Corporate Logo
T#:6107
Part#: 13621433567
Direct Ship
$121.95
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OEM Hella Replacement mass air sensor for the 1999+ M62 engine. The M62 engines have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This replacement HFM fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il
2000-2003 E53 BMW X5 4.4i X5 4.6is

OEM VDO Mass Air Flow Sensor (MAF) -- E36 E39 E38 - M52 S52
OEM VDO Mass Air Flow Sensor (MAF) -- E36 E39 E38 - M52 S52 ...
The mass air sensor/meter measures the volume of air bein...
VDO - Corporate Logo
T#:341063
Part#: 13621703275
Ships in 2 Days
$318.45
Free Shipping

The mass air sensor/meter measures the volume of air being fed into the engine so that the fuel levels can be adjust for optimal performance. A faulty sensor can lead to improper fuel mixture and rough idle and poor performance and gas mileage. Replace your faulty sensor with a high quality OEM VDO sensor to restore normal operation.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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