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BMW 525i Replacement Expansion Tank Information

BMW makes vehicles that display the ultimate of high-class and virtue packaged in a secure and eye-catching design. Top of the line carmaker BMW is renowned for designing limousines that offer refined styling and sleek performance. Does it make any sense to expend a big payment on a fine luxury car, only to skimp on new car parts? To preserve the quality and comfort you chose with your BMW 525i, it's vital to use only the top names in OEM and upgrade parts. Elegant vehicles including your finely crafted BMW 525i are meant to be handled carefully and then given needed maintenance. Your BMW was created with the highest quality and skill; it ought to have new parts with a similar top level of value. Superb capability and automotive performance are bolstered by top-notch components and accessories. Invest in your car or truck's critical components by only installing the best high-quality engine parts. Without the BMW 525i Expansion Tank on your vehicle, the coolant that is discharged under pressure would most likely leak onto the road which is destructive to the planet. Your BMW 525i Expansion Tank permits the gas of the cooling system to expand with the rising temperature and rising pressure. The BMW 525i Expansion Tank can crack due to harsh weather or long use; if this occurs a new tank needs to be installed to preserve the car's cooling systems in perfect shape. You no longer have to decide between cost and dependability when you get your parts and accessories. We stock a vast selection of accessories you want to keep your car or truck humming along for years. No matter whether you own a sporty coupe or a station wagon, we have the accessories you are looking for here at

BMW 525i Expansion Tank They are available for the following BMW 525i years: 2007, 2006, 2005, 2004, 2003, 2002, 2001, 1995, 1994, 1993, 1992, 1991, 1990, 1989, 07, 06, 05, 04, 03, 02, 01, 95, 94, 93, 92, 91, 90, 89. This part is also sometimes called BMW 525i Radiator Overflow Tank. We stock expansion tank parts for most BMW models including 325i, X5, 528i, 328i, X3, 530i, 323i, 740iL, 540i, 330Ci, 335i, 325Ci, 330i, Z4, 325xi, 535i, 750Li, 740i, 545i, 745Li, 330xi, Z3, 650i, M3, 550i, 323Ci, 645Ci, 750i, 745i, 325is, 750iL, 335i xDrive, 328Ci, 530xi, 328is, 535xi, 335xi, 535i xDrive, 318i and 323is.

We stock these Expansion Tank brands for the BMW 525i: Replacement, APA/URO Parts, Behr, Dorman, Action Crash, SKP, API, DIY Solutions and Brock.

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BMW 525i Expansion Tank

With a sleek style and eye-catching performance, your vehicle is renowned for its quality. Also, your comfort is part of the BMW 525i driving experience. When you are in your car, you want to feel the cool air on your skin. That is why the health of your vehicle’s cooling system is central to your driving comfort. If your car overheats, it could be the expansion tank needs to be replaced.

At we offer a big selection of expansion tanks from the leading manufacturers in auto parts. By keeping our prices low, you know you can shop with confidence and find a unit that fits your needs. We offer a 30-day money back guarantee to make certain you are pleased with your purchases.

What is an expansion tank?

Sometimes called a recovery tank, the expansion tank is part of a sealed radiator system which does not react to pressure from the rising temperature of a running vehicle’s cooling system. Because heated water expands, it creates pressure. The expansion tank equalizes the pressure. Thus, as the coolant expands, the excess allows the coolant to fill the empty portion of the pressurized reservoir. Once the air cools inside, the expanded liquid is drawn back into the radiator, thus allowing the radiator to stay full.

How much do expansion tanks cost?

The cost of an expansion tank varies depending on the manufacturer and the style of tanks you need to replace. We carry OEM products through BEHR, Dorman, URO, Vaico, and more.  That being said, the prices here at usually range from $27 to $100 for the BMW 525i expansion tank.

What is the expansion tank made of?

Made from formed copper sheeting which has been carefully soldered, the unique properties of copper allow the tank to expand and contract. As this “work hardening” occurs, the copper gets harder. Over time the metal becomes inflexible and can eventually develop tiny cracks. Install a new tank if cracks do appear.

Some of our Customer Reviews
Very Satisfied
Reviewer: Unbelievable service!

Ordered the part and they state 3-5 shipping days. I was disappointed till I got home the next day and there it was! What a shocker,delivery the next day for no additional charge! Thanks, parts geek! Packaging was perfect and the part fit perfectly! No hiccups or problems.

2003 BMW 525i Expansion Tank

Somewhat Satisfied
Reviewer: Ricardo Belmontes

I was surprised that the part does not have a base, I mean a below cover. Photos when I saw the product does not permit to see such detail.

I have to return the part, but that was easy and I received the reimburse.

1995 BMW 525i Expansion Tank

Very Satisfied
Reviewer: Gabe

product was exact to specs with no room for error the way they have the site setup. Delivery is flawless and will definitely keep you as my parts provider.

2003 BMW 525i Expansion Tank

Very Satisfied
Reviewer: BMW Repair

I always find decent parts for our european vehicles on parts geek. Coolant expansion tank looked and fit just like OEM. Be sure to order the cap and bleed screws seperately.

2003 BMW 525i Expansion Tank

Very Satisfied
Reviewer: BMW expansion tank

The tank fit perfectly with my new radiator. Packaging was very good. Product was delivered as expected.

2003 BMW 525i Expansion Tank

Very Satisfied
Reviewer: Right part

Perfect fit fast quick deliver cant ask for better customer service

2006 BMW 525i Expansion Tank