Tensioner Tension Pulley TT28750056U For BMW
The DUHUI Bearing TT28750056U drive belt tensioner is an OE-spec replacement component for the accessory drive belt system on select BMW models equipped with 4.4L V8 petrol engines. This automatic spring-loaded tensioner maintains proper serpentine belt tension, ensuring reliable alternator, air conditioning compressor, and power steering pump operation. Manufactured to match original equipment specifications including TT28750056U, 119454S100, and 119454S101, this unit delivers reliable performance for BMW passenger car and SUV applications.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | TT28750056U |
| Inner Diameter (Bearing) | 17.00 mm (0.669 inch) |
| Bearing Width | 12.00 mm (0.472 inch) |
| Product Type | Belt Tensioner / Automatic Drive Belt Tensioner |
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: TT28750056U, 119454S100, 119454S101, 11955JA00A, 11955JA00B, 231148
Reference Numbers (Interchange):
GATES: T39272
INA: 532 0615 10
SKF: VKM31050
FEBI BILSTEIN: 30686
DAYCO: APV2787
CONTINENTAL: V-3569
Vehicle Fitment
BMW 540I (E39): 4.4 V8 2002-2003
BMW X5 (E53): 4.4 V8 2000-2006
BMW 740I (E38): 4.4 V8 1999-2001
BMW 840CI (E31): 4.4 V8 1999-2001
BMW RANGE ROVER: 4.4 V8 2002-2005
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Direct OE replacement for BMW applications with TT28750056U / 119454S100.
- Designed for accessory drive belt (serpentine belt) tensioning, maintaining proper belt tension for alternator, A/C compressor, and power steering pump operation.
- Cross-references with multiple leading brands including GATES T39272, INA 532061510, and SKF VKM31050 for easy interchangeability in the aftermarket.
- Precision spring-loaded mechanism automatically adjusts belt tension as the belt stretches over time.
- OE-compatible replacement for original part numbers TT28750056U, 119454S100, 119454S101, 11955JA00A, 11955JA00B, and 231148.
Installation Notes
- This tensioner is designed for the accessory drive belt system on BMW models equipped with 4.4L V8 petrol engines.
- Before removal, locate the OE belt routing diagram under the hood or make a sketch of the belt path.
- Use a long-handled wrench or serpentine belt tool to safely relieve spring tension – never cut or pry the belt off while under tension.
- When replacing the tensioner, it is recommended to inspect the serpentine belt for wear and replace it if necessary.
- Ensure the tensioner mounting surface is clean and free of debris before installing the new unit.
- Torque mounting bolts to manufacturer specifications – verify appropriate torque for your specific engine application.
- After installation, ensure the belt is properly seated in all pulley grooves and tracking correctly. Start engine briefly, shut off, and recheck belt alignment.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces drive belt tensioners and wheel bearing assemblies to OE specifications. Contact us
