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17138665638 - Genuine BMW Expansion Tank Cap - G2x G4x G6x G7x

Genuine BMW Expansion Tank Cap - G2x G4x G6x G7x

Genuine BMW

T#: 628106 | Part#: 17138665638

Part#: 17-13-8-665-638

Part#: 17 13 8 665 638

Part#: 17.13.8.665.638

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$30.99

11% off MSRP:

$34.99

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

Lifetime Replacement

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Product Details

A failing expansion tank cap can compromise your entire cooling system, leading to lost pressure, fluid boil-off, and dangerous temperature spikes under load. This Genuine BMW Coolant Reservoir Cap restores factory pressure thresholds to keep your coolant boiling point elevated during spirited driving and track sessions. Built to precise OEM tolerances for modern G-chassis BMW models, it provides total seal integrity to keep your cooling system operating at peak thermal efficiency.

Restores factory cooling system pressure to prevent heat-induced coolant boil-over
Precision OEM sealing ring prevents fluid migration and system pressure loss
Direct factory replacement engineered to withstand intense thermal cycling and track heat

Prop 65 Warning

Cross Reference

17138665638, 17-13-8-665-638, 17 13 8 665 638, 17.13.8.665.638

Product Q&A

Lifetime Replacement

This Product Is Covered By Our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

Fits These Cars

MAKE	MODEL	SUBMODEL	ENGINE	Special Fitment Notes
BMW	G20	330e	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G20	330e xDrive	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G20	330i	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G20	330i xDrive	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G20	M340i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G20	M340i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G22	430i	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G22	430i xDrive	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G22	M440i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G22	M440i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G23	430i	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G23	430i xDrive	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G23	M440i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G23	M440i xDrive Convertible	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G26	430i Gran Coupe	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G26	430i xDrive Gran Coupe	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G26	M440i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G26	M440i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G29	Z4 sDrive M40i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G29	Z4 sDrive30i	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G42	230i	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G42	230i xDrive	B46 2.0L	Use vehicle selector to confirm fitment
BMW	G42	M240i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G42	M240i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G60	530i	B48 2.0L	Use vehicle selector to confirm fitment
BMW	G60	530i xDrive	B48 2.0L	Use vehicle selector to confirm fitment
BMW	G60	540i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G60	550e xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G70	740i	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G70	740i xDrive	B58 3.0L	Use vehicle selector to confirm fitment
BMW	G70	750e xDrive	B58 3.0L	Use vehicle selector to confirm fitment

*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.