The Precision Raceworks Auxiliary 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

• Weight: 0.24 lbs
• Material type: Anodized Aluminum
• O-Ring Material: Viton
• Retains OEM Pressure Relief: YES

Fitments

• Bmw 228i 2021 to 2023
• Bmw 228ix 2020 to 2023
• Bmw 230i 2017 to 2023
• Bmw 230ix 2017 to 2023
• Bmw 330e 2016 to 2023
• Bmw 330ex 2021 to 2023
• Bmw 330i 2017 to 2023
• Bmw 330ix 2017 to 2023
• Bmw 340i 2016 to 2019
• Bmw 340ix 2016 to 2019
• Bmw 430i 2017 to 2023
• Bmw 430ix 2017 to 2023
• Bmw 440i 2017 to 2020
• Bmw 440ix 2017 to 2020
• Bmw 530e 2017 to 2023
• Bmw 530ex 2017 to 2023
• Bmw 530i 2017 to 2023
• Bmw 530ix 2017 to 2023
• Bmw 540i 2017 to 2023
• Bmw 540ix 2017 to 2023
• Bmw 550i 2010 to 2016
• Bmw 550ix 2010 to 2017
• Bmw 640ix 2018 to 2020
• Bmw 650i 2011 to 2018
• Bmw 650ix 2012 to 2018
• Bmw 740ex 2017 to 2018
• Bmw 740i 2016 to 2023
• Bmw 740ix 2016 to 2022
• Bmw 745ex 2019 to 2022
• Bmw 750ex 2024
• Bmw 750i 2009 to 2019
• Bmw 750ix 2010 to 2022
• Bmw 750li 2009 to 2015
• Bmw 750lix 2010 to 2015
• Bmw 760ix 2023
• Bmw 760li 2010 to 2014
• Bmw 840i 2020 to 2023
• Bmw 840ix 2020 to 2023
• Bmw Alpina B7 2010 to 2022
• Bmw Alpina B7l 2010 to 2015
• Bmw Alpina B7lx 2011 to 2014
• Bmw Alpina B7x 2011 to 2014
• Bmw Alpina Xb7 2021 to 2023
• Bmw Hybrid 3 2013
• Bmw Hybrid 5 2012 to 2013
• Bmw Hybrid 7 2010 to 2012
• Bmw Hybrid 7l 2010 to 2014
• Bmw Hybrid X6 2010
• Bmw I3 2014 to 2021
• Bmw I3s 2018 to 2021
• Bmw I8 2015 to 2020
• Bmw M2 2019 to 2023
• Bmw M235ix 2020 to 2023
• Bmw M240i 2017 to 2023
• Bmw M240ix 2017 to 2023
• Bmw M3 2014 to 2023
• Bmw M340i 2019 to 2023
• Bmw M340ix 2019 to 2023
• Bmw M4 2014 to 2023
• Bmw M4 Gts 2017
• Bmw M440i 2021 to 2023
• Bmw M440ix 2021 to 2023
• Bmw M5 2012 to 2023
• Bmw M5 Cs 2022
• Bmw M550ix 2017 to 2023
• Bmw M6 2012 to 2018
• Bmw M760ix 2017 to 2022
• Bmw M8 2020 to 2023
• Bmw M850ix 2019 to 2023
• Bmw X1 2016 to 2023
• Bmw X2 2018 to 2023
• Bmw X3 2018 to 2023
• Bmw X4 2018 to 2023
• Bmw X5 2010 to 2023
• Bmw X6 2009 to 2023
• Bmw X7 2019 to 2023
• Bmw Xm 2023
• Bmw Z4 2019 to 2023
• Toyota Supra 2019 to 2023

Handling

Orders shipped directly from our warehouse are usually processed the same business day if placed before 12 PM MST, and tracking details are provided within 1 business day.

For drop-shipped items, processing times may vary depending on the manufacturer, typically 3–5 business days. Tracking updates may take longer in such cases.

Expedited shipping applies only once the item is ready to ship.

Return

You have 30 days after receiving your order to request a return. Items must be unused, in original packaging, and include proof of purchase. Customers are responsible for covering the return shipping costs.

To start a return, email us at sales@palenonperformance.com. Returns sent without approval will not be accepted.

You can request a return directly from your account by selecting the return option on your order page. Here is the URL: https://shopify.com/55092379855/account/orders

Non-returnable items:

• Burger Motorsports (BMS) products
• Used items
  
• Air Intakes
• Hazardous materials, flammable liquids, or gases
• Discounted items and gift cards other than "PALENON PERFORMANCE" brand 

Exchanges

Return the item and place a new order once approved.

Refunds

Approved refunds are issued to the original payment method. A restocking fee is 20% will be applied. Processing time depends on your bank or payment provider. The original shipping cost will not be refunded.

Cancellations

Canceled orders are subject to a 5% merchant fee (8% for Shop Pay installments). Custom, specialized items or pre-order items canceled within their lead time are also subject to this fee. Will also incur a 10% restocking fee.

Damaged or incorrect items

Inspect your order upon arrival and contact us immediately for assistance. If the wrong part was ordered, customer covers return shipping.

Disputes / Chargebacks

Our legal team is fully prepared to take stringent action against you for filing a baseless claim and initiating a fraudulent chargeback. This will lead to civil or criminal proceedings, which would require you to engage with our attorneys in our jurisdiction.

It is crucial to understand that filing a false chargeback is a serious offense, punishable by substantial fines or imprisonment. Potential penalties for fraudulent chargebacks can include one to three years in prison and fines ranging from $1,000 to $10,000. We treat all chargebacks with the utmost seriousness, regardless of the amount, as this is classified as a felony.

We will compose all necessary information to send your account to a collections agency and request that you be served once our lawyers organize the evidence and file a case against you.