✨ Christmas Special: Get 35% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Life Hack Bmw Engine Coolant Reservoir Cap Smart Choice [coutI0fs]

$21.99 $70.99 -69%

The Precision Raceworks Engine Coolant Reservoir Cap is a functional and stunningly  stylish way to add a nice touch to any engine bay!This cap come in three color options so there is always a color that will work for you! Black with Billet, Black wi

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

Life Hack Bmw Engine Coolant Reservoir Cap Smart Choice [coutI0fs]

The Precision Raceworks Engine Coolant Reservoir Cap is a functional and stunningly  stylish way to add a nice touch to any engine bay!

This cap come in three color options so there is always a color that will work for you! Black with Billet, Black with Blue, and the Stealth series (all black).

Many people don't realize it but the OEM caps have a pressure release valve built into them.  Often times aftermarket companies don't know this either or just don't care.  But our team cares about proper function just as much as we care about the appearance in every product we design. For pressure relief, our caps incorporate the OEM internals, so you get all the functionality of the original caps, ensuring a safe and reliable system in place.

These caps offer superior style and performance-grade components that guarantee a reliable fit every time. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come.

Other companies make covers that install with adhesive over your factory caps and can come off over time. These caps offer superior style and performance-grade components that replace the factory cap not just cover it up. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come!


PLEASE NOTE:

These do require assembly and swapping the pressure relief valves from your old caps to your new billet caps. 

 

Fitment Note

If your primary expansion tank cap looks like this:

You will need to purchase a different coolant expansion tank cap to use as the donor cap. 

BMW Part number 17117639021



What Our Customers Say

January 26, 2026

Absolutely no complaints!

An excellent product. A wise choice.

- Quade C..

January 26, 2026

Absolutely no complaints!

It's a solid, well-built, reliable tool.

- Queenie M..

January 26, 2026

Absolutely no complaints!

It delivers fantastic results every time.

- Tamsin F..

Write a Review

You Might Also Like

Discover more great products from our collection.

VW 95.5mm Water Box 2000/2200

VW 95.5mm Water Box 2000/2200

(215)
$48.99 $156.99 -69%
SLOANE Collection Rug  in  SMOKE

SLOANE Collection Rug in SMOKE

(110)
$54.99 $175.99 -69%
SL M146 004

SL M146 004

(543)
$52.99 $169.99 -69%

Copyright 2026 © mappa-mercia.org

VISA
PayPal
Stripe
Mastercard
CASH ON DELIVERY