Coolant Expansion Tank Cap for Volkswagen Golf, Jetta, Audi A3, A4 (1998–2006) 3B0121321

Includes: - Coolant Expansion Tank Cap Fits Models: - Volkswagen Golf - Volkswagen Jetta - Audi A3 - Audi A4 Model Years: - 1998–2006 Submodels: - Golf Mk4, Jetta Mk4, A3 (8L), A4 (B6), A4 (B7) Engine Options: - Common engine sizes include 1.8L Turbo (AEB, ATW), 2.0L (ABA), 2.8L V6 (AAA), 3.0L V6 (BDF), and 1.9L TDI (ALH) Description: This coolant expansion tank cap is designed for various Volkswagen and Audi models from 1998 to 2006. It ensures proper pressure regulation in the cooling system, preventing coolant loss and overheating. The cap is a direct replacement for the OEM part number 3B0121321, ensuring a perfect fit and reliable performance. Features: - Direct replacement for OEM part number 3B0121321 - Compatible with multiple Volkswagen and Audi models - Ensures proper pressure regulation in the cooling system - Prevents coolant loss and overheating - Durable construction for long-lasting use