Timing Chain Tensioner for Audi Q7/Volkswagen Touareg TDI (057109217J / 95510521700)

1. Part Numbers: This timing chain tensioner is engineered with OEM part numbers 057109217J and 95510521700, ensuring precise compatibility with Audi and Volkswagen TDI models. These codes validate its authenticity and guarantee a factory-spec fit for reliable engine timing performance.
2. Vehicle Compatibility: Specifically designed for:
   • Audi Q7 (4L): 2006–2015 (3.0L TDI, 4.2L TDI engines; engine codes CRCA, CASA)
   • Volkswagen Touareg (7L): 2002–2010 (3.0L TDI, 4.2L TDI engines; engine codes BRE, BKS)
     Verify your vehicle’s engine code and production year for exact fitment.
3. Function and Quality: The tensioner maintains optimal timing chain tension to prevent slack, noise, or misalignment—critical for TDI engines’ high-pressure fuel systems. Constructed with a durable aluminum housing, hardened steel piston, and hydraulic damping, it withstands pressures up to 9 bar and temperatures up to 135°C. The self-locking mechanism ensures consistent tension, while heat-resistant seals prevent oil leaks. Replace worn units during scheduled service to avoid chain slippage, restore timing precision, and protect against costly engine damage in interference designs.

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