Tensioner 531047720 For Audi Volkswagen
The DUHUI Bearing 531047720 timing belt idler pulley is an OE-spec replacement component for the timing belt system on select Audi and Volkswagen models equipped with 2.5L V6, 2.7T V6, and 2.8L V6 engines. This idler pulley ensures proper timing belt routing and maintains correct belt tension, ensuring accurate valve and piston synchronization for reliable engine operation. Manufactured to match original equipment specifications including 531047720, 078109243Q, 078109243R, and 078109243S, this unit is a critical component for timing belt replacement service on the VW Group engine families.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | 531047720 |
| Outer Diameter | 72.00 mm (2.835 inch) |
| Width | 32.50 mm (1.280 inch) |
| Product Type | Timing Belt Idler Pulley / Guide Pulley |
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Numbers & Reference Numbers
DH Code:
OE Numbers: 531047720, 078109243Q, 078109243R, 078109243S
Reference Numbers (Interchange):
INA: 531047720
GATES: T42051
SKF: VKM21006
FEBI BILSTEIN: 20965
Vehicle Fitment
AUDI A4 (B6, 8E5): 2.5 V6 TDI 2000-2005
VOLKSWAGEN PASSAT (3B3): 2.5 V6 TDI 2000-2005
AUDI A4 (B5): 2.5 V6 TDI 1998-2001
VOLKSWAGEN PASSAT (B5): 2.5 V6 TDI 1998-2001
AUDI A6 (C5): 2.5 V6 TDI 1997-2004
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Direct OE replacement for VW Group applications with 531047720 / 078109243Q.
- Precision-engineered guide pulley for timing belt systems on 2.5L V6 and 2.7T V6 engines.
- Cross-references with multiple leading brands including INA 531047720 and GATES T42051 for easy interchangeability in the aftermarket.
- Premium sealed bearing protects from contaminants and ensures long service life.
- OE-compatible replacement for original part numbers 531047720, 078109243Q, 078109243R, and 078109243S.
Installation Notes
- This idler pulley is designed for the timing belt system on Audi and VW models equipped with 2.5L V6, 2.7T V6, and 2.8L V6 engines.
- When replacing the idler pulley, it is highly recommended to replace the timing belt, tensioner, and water pump as well – these are interference engines and timing belt failure can cause serious damage to valves and pistons.
- Before removal, locate the OE belt routing diagram or make a sketch of the belt path.
- Use appropriate tools to safely relieve tension – never cut or pry the belt off while under tension.
- Ensure the mounting surface is clean and free of debris before installing the new unit.
- Torque mounting bolt to manufacturer specifications – verify appropriate torque for your specific engine application.
- After installation, rotate the engine by hand to verify proper belt tension and alignment, then start the engine briefly and recheck.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces timing belt idler pulleys, tensioner pulleys, and wheel bearing assemblies to OE specifications. Contact us
