BMW Coolant Expansion Tanks for BMW 7 Series E66 (2002-2008)

Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:207187

Part#: 17117639022

In Stock

21% off MSRP $ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.67 USD

Add to Wish List

Qty

21% off MSRP

$ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.67 USD

Add to Wish List

Genuine BMW Radiator Cap - 2,0Bar
This item fits the following BMW Chassis:
E36 M3,E39 M5,E46 M3,E85 Z4M,E53 48IS,E36,E38,E39,E46,E53 X5,E65,E83 X3,E85 Z4,E86 Z4,F06,F10,F12,F13

Show More Show Less

MMX 90mm Billet Coolant Expansion Tank Cap | BMW

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:29002094

Part#: MMR03-1502

Ships in 1 Business Day

$ 127.99 USD

Add to Wish List

Qty

$ 127.99 USD

Add to Wish List

The MMX Performance 90mm billet coolant expansion cap for BMWs has been designed from the ground up in the UK, from a solid piece of billet aluminum. Each cap was designed to directly replace the OE cap, not merely stuck in place. Fitment is for models with the matching OE (17 11 7 639 021) part number.

Show More Show Less

Expansion Tank

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:377312

Part#: 17137543003

Ships in 1 Business Day

$ 56.99 USD

Add to Wish List

Qty

$ 56.99 USD

Add to Wish List

The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.

Show More Show Less

Genuine BMW Coolant Expansion Tank

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:377055

Part#: 17137647713

Ships in 3 Business Days

7% off MSRP $ 189.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 176.99 USD

Add to Wish List

Qty

7% off MSRP

$ 189.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 176.99 USD

Add to Wish List

Meyle Expansion Tank Cap

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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 Behr Coolant Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:2766

Part#: 17111742231

In Stock

$ 19.99 USD

Add to Wish List

Qty

$ 19.99 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.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i 540i M5
1989-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1998 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2011 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 30.0i X5 4.4i X5 4.6is X5 4.8is
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Coupe M Roadster
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si M Roadster M Coupe
2000-2003 E52 BMW Z8 Z8 Alpina
2007+ E90 BMW 335i & 335xi

Show More Show Less

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:340541

Part#: 17111742231

In Stock

$ 17.99 USD

Add to Wish List

Qty

$ 17.99 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

Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:640208

Part#: 17117639022

In Stock

Sale - Save 15% $ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

Add to Wish List

Qty

Sale - Save 15%

$ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 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. 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

Rein Coolant Expansion Tank - E65, E66

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:593077

Part#: 17137647713

Ships in 4 Business Days

$ 99.99 USD

Add to Wish List

Qty

$ 99.99 USD

Add to Wish List

Replace your cracked or faded tank

Coolant Expansion Tank - E65 745i/li, 750i/li, 760i/li

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:186486

Part#: 17137647713

Ships on Jun 22, 2026

$ 81.99 USD

Add to Wish List

Qty

$ 81.99 USD

Add to Wish List

This high quality BEHR brand expansion tank is used on E65/E66 7 series with the N62 and N73 engines, and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own BMWs.

If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. 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. Replaces part numbers 17137543003 and 17138600275.

This item fits the following BMWs:
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li

Show More Show Less

2 Pin Connector

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:33412932

Part#: 61132359999

Ships on Jul 28, 2026

Sale - Save 25% $ 10.99

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

$ 8.24 USD

Add to Wish List

Qty

Sale - Save 25%

$ 10.99

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

$ 8.24 USD

Add to Wish List

Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

Show More Show Less

Fluid Level Sensor

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

T#:5973204

Part#: 17117546548

Special Order: No Guaranteed ETA

$ 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

Project Cars

SELECT YOUR BMW

BMW Coolant Expansion Tanks for BMW 7 Series E66 (2002-2008)

Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

MMX 90mm Billet Coolant Expansion Tank Cap | BMW

Expansion Tank

Genuine BMW Coolant Expansion Tank

Meyle Expansion Tank Cap

OEM Behr Coolant Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 ...

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

Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

Rein Coolant Expansion Tank - E65, E66

Coolant Expansion Tank - E65 745i/li, 750i/li, 760i/li

2 Pin Connector

Fluid Level Sensor

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results