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SKF TBP21204 Engine Timing Idler Bearing - Left or Upper
SKF Timing Idler Bearing TBP21204
The SKF TBP21204 engine timing idler bearing is built for timing belt systems that need steady belt tracking and low-friction operation. With precise dimensions and SKF bearing and seal engineering, it supports reliable engine timing performance in applications such as Audi A6 Quattro, Audi A8 Quattro, and Volkswagen Phaeton.
Key Features
- Inside diameter: 0.393 in for proper shaft fitment
- Outside diameter: 2.283 in for accurate pulley/bearing support
- Width: 1.417 in for correct spacing in the timing assembly
- Low-friction ball bearing construction for smooth rotation
- High-performance grease and seal design for consistent operation
- SKF engineered for engine timing applications
Product Details
The TBP21204 is an engine timing idler bearing designed for timing belt systems that require stable belt guidance and dependable rotational support. SKF manufactures this bearing with the dimensional accuracy needed for timing belt service, helping maintain belt tension and alignment in the engine timing assembly. This part cross-references 077109244E for the same application. It is a direct-fit option for select Audi A6 Quattro, Audi A8 Quattro, Audi RS6, Audi S6, Audi S8, Audi A8, and Volkswagen Phaeton timing applications.
What It Helps Address
- Timing belt noise caused by worn bearing surfaces
- Belt tracking issues from a loose or rough idler bearing
- Irregular engine timing operation related to pulley wear
- Premature belt stress from inconsistent rotational resistance
- Service replacement for a damaged engine timing idler bearing with housing assembly
Installation Notes and Tips
Verify the inside diameter, outside diameter, and width against the original part before installation. Confirm vehicle position and engine timing configuration using the fitment data: Fits 2004-2006 Volkswagen Phaeton, Upper; Fits 2000-2004 Audi A6 Quattro, Left; Fits 1998-2004 Audi A8 Quattro, Left; Fits 2003-2004 Audi RS6, Left; Fits 2002-2003 Audi S6, N/A; Fits 2001-2003 Audi S8, N/A; Fits 1998-1999 Audi A8, Left. Proper timing system service procedures should be followed during replacement to maintain correct belt alignment and engine timing.
Quality Assurance
SKF has more than 100 years of engineering experience in bearings and seals, and this timing idler bearing is manufactured to high quality standards for long service life and safety-focused performance. The TBP21204 reflects SKF’s emphasis on low-friction operation, durable grease retention, and dependable sealing in engine timing use.
| Brand | SKF |
|---|---|
| Part Number | TBP21204 |
| Inside Diameter | 0.393 |
| Width | 1.417 |
| Outside Diameter | 2.283 |
This part fits 24 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Volkswagen | Phaeton | 4.2L | V8 | Upper | Engine Timing Idler Bearing with Housing Assembly |
| 2005 | Volkswagen | Phaeton | 4.2L | V8 | Upper | Engine Timing Idler Bearing with Housing Assembly |
| 2004 | Audi | A6 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2004 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2004 | Audi | RS6 | Left | Engine Timing Idler Bearing with Housing Assembly | ||
| 2004 | Volkswagen | Phaeton | 4.2L | V8 | Upper | Engine Timing Idler Bearing with Housing Assembly |
| 2003 | Audi | A6 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2003 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2003 | Audi | RS6 | Left | Engine Timing Idler Bearing with Housing Assembly | ||
| 2003 | Audi | S6 | 4.2L | V8 | N/A | Engine Timing Idler Bearing with Housing Assembly |
| 2003 | Audi | S8 | 4.2L | V8 | N/A | Engine Timing Idler Bearing with Housing Assembly |
| 2002 | Audi | A6 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2002 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2002 | Audi | S6 | 4.2L | V8 | N/A | Engine Timing Idler Bearing with Housing Assembly |
| 2002 | Audi | S8 | 4.2L | V8 | N/A | Engine Timing Idler Bearing with Housing Assembly |
| 2001 | Audi | A6 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2001 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2001 | Audi | S8 | 4.2L | V8 | N/A | Engine Timing Idler Bearing with Housing Assembly |
| 2000 | Audi | A6 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 2000 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 1999 | Audi | A8 | 3.7L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 1999 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 1998 | Audi | A8 | 3.7L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
| 1998 | Audi | A8 Quattro | 4.2L | V8 | Left | Engine Timing Idler Bearing with Housing Assembly |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.