Billet Aluminum Coolant Reservoir Cap for VW Audi MQB (Golf GTI R A3 S3 TT)

Upgrade your engine bay with this billet aluminum coolant reservoir cap designed for a wide range of VW and Audi MQB platform vehicles. Replacing the factory plastic cap, this upgrade offers improved durability, heat resistance, and a more refined appearance under the hood. With a precision-machined design and anodized finish, it delivers both function and a clean performance-inspired look.

Features:

• Billet aluminum construction for improved durability over factory plastic caps
• Enhanced heat resistance for long-term reliability
• Precision CNC-machined design for accurate fitment
• Anodized finish for corrosion and wear resistance
• Textured grip design for easy removal and installation
• Includes O-ring seal for a secure and leak-free fit
• Direct replacement for factory coolant reservoir cap

Fitment:

• Compatible with VW and Audi MQB platform vehicles
• Common models include Golf MK6, MK7, MK7.5, MK8, GTI, Golf R
• Also fits Audi A3, S3, TT, and related MQB models
• Compatible with select SEAT and Skoda MQB platform vehicles

Replaces Part Numbers:

• 3C0121321
• 2Q0121321
• 5Q0121321

Specifications:

• Material: 6061 aluminum alloy
• Finish: Anodized
• Design: OEM-style pressure cap replacement

Contents:

• 1x Coolant reservoir cap

Installation Notes:

• Ensure engine is completely cool before installation
• Transfer the internal pressure valve from the factory cap if required
• Do not overtighten during installation
• Professional installation recommended if unsure

Condition:

• Brand new
• Never used