BMW Aluminum Expansion Tank Coolant Cap Cover – Upgraded Billet Design for Enhanced Durability & Sporty Engine Bay Look | Fits Most BMW 1, 3, 4, 5 Series Models | N20, N26, N52, N54, N55 & More | Fits OEM 17117639020

Give your BMW’s engine bay the finishing touch it deserves with the BAVMODS® Aluminum Expansion Tank Coolant Cap Cover — a quick, stylish upgrade that installs directly over your factory plastic cap in seconds.

Crafted from high-grade billet aluminum, this cap cover not only enhances the look of your cooling system but also helps protect the original cap from heat, fading, and wear over time.

Perfect for both daily drivers and show builds, it’s a small detail that makes a big difference every time you pop the hood.

Key Features:

• Easy Slip-On Design – Fits snugly over the factory coolant cap; no tools or modifications required.
• Premium Aluminum Construction – Durable, heat-resistant, and corrosion-proof.
• Sporty Red Finish – Adds an M-inspired, performance aesthetic to your engine bay.
• Protective Layer – Shields the factory cap from UV damage and heat cycling.
• Installs in Minutes – Simple, direct-fit upgrade for instant visual impact.

FITMENT: Designed for most BMW 1, 3, 4, and 5 Series models equipped with N20, N26, N52, N54, N55, and similar engines.

Fits models including: E60 / E61 5 Series, E81 / E82 / E87 / E88 1 Series, E90 / E91 / E92 / E93 3 Series, E9X M3 and any other BMW that use expansion tank part number 17117639020.

OEM Reference: 17117639020

BAVMODS Part No: BAV0000025F

Please refer to the “Fitment” section in the product description for compatibility details.