Home
Cooling
Expansion Tanks

BMW Coolant Expansion Tanks for BMW X Series E53 (2000-2006)

Clear BMW chassis

On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.

Sort By:

Meyle Coolant Expansion Tank - E53 X5, E46 M52/54, E83 X3

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:369184

Part#: 17117573781

In Stock

$ 66.99 USD

Add to Wish List

Qty

$ 66.99 USD

Add to Wish List

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.

Other items to consider replacing at the same time are the radiator cap, coolant level sensor, lower radiator hose, coolant temp sensor, and the hose clamps. If your car has an automatic transmission you should also replace the oil cooler thermostat in the radiator frame, which is a common source for leaks.

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!

Show More Show Less

Rein Coolant Expansion Tank - E46, E53, E83

2X Entries Into Our F80 M3 Sweepstakes

T#:402141

Part#: 17117573781

In Stock

Sale - Save 5% $ 76.39

This product was last offered at the strikethrough price on
08-31-2026

$ 72.57 USD

Add to Wish List

Qty

Sale - Save 5%

$ 76.39

This product was last offered at the strikethrough price on
08-31-2026

$ 72.57 USD

Add to Wish List

Includes cap and level sensor

Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:591949

Part#: 17107514964

Back Ordered

Sale - Save 5% $ 80.99

This product was last offered at the strikethrough price on
08-31-2026

$ 76.94 USD

Add to Wish List

Qty

Sale - Save 5%

$ 80.99

This product was last offered at the strikethrough price on
08-31-2026

$ 76.94 USD

Add to Wish List

Includes bleeder screw

Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:592015

Part#: 17137501959

Ships in 2 Business Days

Sale - Save 5% $ 74.99

This product was last offered at the strikethrough price on
08-31-2026

$ 71.24 USD

Add to Wish List

Qty

Sale - Save 5%

$ 74.99

This product was last offered at the strikethrough price on
08-31-2026

$ 71.24 USD

Add to Wish List

Includes vent screw and leveling switch

Meyle Expansion Tank Cap

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:579357

Part#: 3148009004

In Stock

Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

Add to Wish List

Qty

Sale - Save 40%

$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

Add to Wish List

Replace worn or missing pieces.

OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

2X Entries Into Our F80 M3 Sweepstakes

T#:340541

Part#: 17111742231

Ships in 1 Business Day

Sale - Save 5% $ 17.99

This product was last offered at the strikethrough price on
08-31-2026

$ 17.09 USD

Add to Wish List

Qty

Sale - Save 5%

$ 17.99

This product was last offered at the strikethrough price on
08-31-2026

$ 17.09 USD

Add to Wish List

This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

Show More Show Less

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640140

Part#: 17111712788

Ships on Dec 2, 2026

Sale - Save 39% $ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

Add to Wish List

Qty

Sale - Save 39%

$ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

Add to Wish List

Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Expansion Tank With Cap

2X Entries Into Our F80 M3 Sweepstakes

T#:46616025

Part#: EPK0138

Ships in 3 Business Days

Sale - Save 5% $ 71.99

This product was last offered at the strikethrough price on
08-31-2026

$ 68.25 USD

Add to Wish List

Qty

Sale - Save 5%

$ 71.99

This product was last offered at the strikethrough price on
08-31-2026

$ 68.25 USD

Add to Wish List

The coolant expansion tank allows excess coolant to flow in and out as temperatures rise and fall. Over time, repeated exposure to extreme temperature changes can cause the tank to crack, split, or break. To keep your cooling system sealed and functioning properly, any tank showing signs of damage—such as cracks, broken nipples, or compromised mounting points—should be replaced.

Show More Show Less

BMW Expansion Tank With Cap - 17107514964

2X Entries Into Our F80 M3 Sweepstakes

T#:46616026

Part#: EPK0025

Ships in 3 Business Days

Sale - Save 6% $ 74.99

This product was last offered at the strikethrough price on
08-31-2026

$ 70.63 USD

Add to Wish List

Qty

Sale - Save 6%

$ 74.99

This product was last offered at the strikethrough price on
08-31-2026

$ 70.63 USD

Add to Wish List

The coolant expansion tank provides a place for excess coolant to flow as temperatures rise and fall. Because it’s exposed to constant heat cycles and pressure changes, it can eventually crack, split, or suffer damage to its nipples or mounting points. Keeping coolant properly contained within the system is essential, so if your tank shows signs of wear or damage, replacement is necessary. This direct-fit replacement installs easily and delivers the same heating and cooling performance as the factory unit. When replacing the tank, be sure to have additional coolant on hand. ECS Tuning carries a full range of vehicle-specific coolants designed to meet OEM specifications. Most German vehicles require specialized formulas—using the correct coolant will help prevent corrosion and ensure long-term reliability.

Show More Show Less

Expansion Tank Mounting Plate

2X Entries Into Our F80 M3 Sweepstakes

T#:591946

Part#: 17101439110

Ships in 3 Business Days

Sale - Save 5% $ 80.99

This product was last offered at the strikethrough price on
08-31-2026

$ 76.94 USD

Add to Wish List

Qty

Sale - Save 5%

$ 80.99

This product was last offered at the strikethrough price on
08-31-2026

$ 76.94 USD

Add to Wish List

Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640497

Part#: 17107514964

In Stock

Sale - Save 50% $ 63.99

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

$ 32.00 USD

Add to Wish List

Qty

Sale - Save 50%

$ 63.99

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

$ 32.00 USD

Add to Wish List

This radiator expansion tank is used on E53 X5 4.4i and 4.6is with M62 engine, and Z3 2.3 2.5i 2.8 3.0i from 1999-2002. It is a common failure item as the plastic weakens over time and stress cracks will lead to coolant leaks. 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.

Show More Show Less

Fluid Level Sensor

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:5973204

Part#: 17117546548

Ships on Sep 22, 2026

$ 13.99 USD

Add to Wish List

Qty

$ 13.99 USD

Add to Wish List

MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548

Show More Show Less

Select Vehicle

Purpose

Category

Home
Cooling

Expansion Tanks

Brand

View All Brands

Price

Special Offers

Shipping