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Bav Auto Coolant Expansion Tank - E36 E39 Z3 M50 M52 S50 S52 ...

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T#:638094

Part#: 17111723520

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Sale - Save 20% $ 39.99

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

$ 31.99 USD

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Replace your old expansion tank to prevent potential failure or leaks. Includes a brand new coolant level sensor. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Bav Auto Coolant Expansion Tank - E53 X5, E46, E83 X3

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T#:640496

Part#: 17137787039

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Sale - Save 18% $ 61.99

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

$ 50.99 USD

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We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Bav Auto Coolant Expansion Tank - BMW E90 335d M57 3.0L

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T#:640493

Part#: 17138570079

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Sale - Save 20% $ 78.99

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

$ 63.19 USD

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Sale - Save 20%

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This product was last offered at the strikethrough price on
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$ 63.19 USD

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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6 ...

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T#:638093

Part#: 17138621092

In Stock

Sale - Save 20% $ 60.99

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

$ 48.79 USD

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Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E9...

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Compatible with hotside and coldside (OE location) intakes

T#:568369

Part#: 021942TMS13

In Stock

Sale - Save 15% $ 815.99

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

$ 693.59 USD

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$ 815.99

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$ 693.59 USD

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Hotside intakes are a very common modification for N54 powered BMWs. Here at Turner Motorsport, we found ourselves unsatisfied with all existing solutions to relocate the coolant expansion tank to the cold side of your engine bay, freeing up real estate on the hot side. We decided to make an end all be all solution for people looking to relocate your expansion tank that's compatible with both hotside intakes and factory location coldside intakes. All CAD designed in-house, our N54 aluminum expansion tank relocation kit allows you to seamlessly mount our new aluminum expansion tank on the cold side of your engine bay.

Turner Motorsport HD Aluminum Coolant Expansion Tank Kit - M50/M52/S5...

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T#:9998526

Part#: 008348LA01BKT

Ships on Oct 13, 2026

Sale - Save 20% $ 423.99

This product was last offered at the strikethrough price on
06-14-2026

$ 339.19 USD

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This product was last offered at the strikethrough price on
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$ 339.19 USD

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Our Turner Motorsport's full aluminum expansion tank was designed and engineered in house to help with the weak point in your E36 cooling system. The coolant expansion tank goes through heat cycles over and over again from regular driving, it is important that your expansion tank is doing its job to retain coolant to keep your engine operating temperatures down and keep your engine bay clean. Not only is this a major upgrade but also a great maintenance item to replace. Our expansion tank was designed to fit the OEM hoses for an easy install and comes with all the upgraded items you will need for a clean install,

If your E36 needs a new expansion tank, make sure this is the last expansion tank you ever need to buy. Our coolant expansion tank has a full aluminum construction and wrinkle black powder coat for durability. Expansion tank kit comes with all the accessories you need to replace your expansion tank once, and never have to worry about it again.

Aluminum Coolant Expansion Tank Features:

- Maintains stock coolant capacity and expansion volume

- Designed to maintain OE coolant elevation, preventing air pockets

- Baffled tank ensures that air pockets cannot be introduced during aggressive driving and provides accurate coolant level reading

- Carefully designed bleed passage prevents the introduction of air as the engine cools

- Turner engraved internal fill level

- TIG welded 5052 aluminum construction

- All bungs are machined to fit factory hose ends

Kit contents:

Turner Aluminum Expansion Tank
Coolant level sensor
Expansion tank cap
Heavy duty bleeder screw
Flared coolant pressure release line
Hardware for installation

Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E8...

10X Entries Into Our F80 M3 Sweepstakes
Compatible with hotside and coldside (OE location) intakes

T#:568368

Part#: 021942TMS14

In Stock

Sale - Save 13% $ 815.99

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

$ 708.04 USD

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Sale - Save 13%

$ 815.99

This product was last offered at the strikethrough price on
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$ 708.04 USD

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Hotside intakes are a very common modification for N54 powered BMWs. Here at Turner Motorsport, we found ourselves unsatisfied with all existing solutions to relocate the coolant expansion tank to the cold side of your engine bay, freeing up real estate on the hot side. We decided to make an end all be all solution for people looking to relocate your expansion tank. All CAD designed in-house, our N54 aluminum expansion tank relocation kit allows you to seamlessly mount our new aluminum expansion tank on the cold side of your engine bay, featuring an integrated power steering pump reservoir mount. During the design process, we did everything possible to ensure no air pockets could develop in the cooling system even during spirited drives. The baffled tank is all TIG welded 5052 aluminum construction, featuring a carefully designed bleed passage. We also machined all of our bungs to accept OEM hose ends, to keep the fit and finish as OE+ as possible. Keeping with this same mindset, we made sure that coolant elevation matches OE exactly, and integrated a power steering pump reservoir mount. Our aluminum expansion tank accepts the OE coolant level sensor, bleeder screw, and coolant cap, but we include new ones with this kit, as we thought you should replace them during installation. See more about these features in the list below, and if you have any additional questions please feel free to call into our staff of skilled BMW enthusiasts at 1-800-280-6966. Find our Installation Guide HERE Features and benefits: TIG welded 5052 aluminum construction, wrinkle black powder coated Utilizes factory coolant capacity and expansion volume CAD designed to retain OE coolant elevation, which prevents air pockets Baffled tank ensures that air pockets will not be created under spirited driving conditions, and ensures accurate coolant level reading Meticulously designed bleed passage prevents air pockets while the engine cools All bungs machined for factory hose end compatibility (no barb fittings!) Integrated power steering reservoir mount Kit includes Turner Motorsport aluminum expansion tank, Turner Motorsport wiring harness, all necessary hoses, hardware, OE level sensor, bleeder screw, and coolant cap This product fits the following BMWs: 2008-2013 E82 135i 2007-2013 E88 135i

Bav Auto Coolant Expansion Tank - E60 E61 E63 E64 M54 N52 N62 ...

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T#:640491

Part#: 17137542986

Special Order: No Guaranteed ETA

Sale - Save 10% $ 54.99

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

$ 49.49 USD

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This Bav Auto cooling system expansion tank/coolant reservoir is a direct replacement for the factory unit. Replace your cracked or leaking radiator expansion tank today. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Bav Auto Coolant Level Sensor - BMW E36 E39 M50/52 S50/52

10X Entries Into Our F80 M3 Sweepstakes

T#:639793

Part#: 61318360855

In Stock

Sale - Save 19% $ 20.99

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

$ 16.99 USD

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$ 16.99 USD

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This is the sensor / sending unit that notifies the computer if your coolant level is low. When this fails, it can give a false indication of low coolant -- or worse, not inform you of a low coolant situation that could potentially cause overheating. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Showing 9 results for "coolant expansion tank"

Bav Auto Coolant Expansion Tank - E36 E39 Z3 M50 M52 S50 S52 ...

Bav Auto Coolant Expansion Tank - E53 X5, E46, E83 X3

Bav Auto Coolant Expansion Tank - BMW E90 335d M57 3.0L

Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6 ...

Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E9...

Turner Motorsport HD Aluminum Coolant Expansion Tank Kit - M50/M52/S5...

Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E8...

Bav Auto Coolant Expansion Tank - E60 E61 E63 E64 M54 N52 N62 ...

Bav Auto Coolant Level Sensor - BMW E36 E39 M50/52 S50/52

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