Tensioner 12575509 For Alfa-Romeo Cadillac
The DUHUI Bearing 12575509 drive belt tensioner is an OE-spec replacement component for the accessory drive belt system on select Alfa Romeo and Cadillac models equipped with 2.4L and 3.2L 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 12575509 and 1754078J00, this unit delivers reliable performance for premium European and North American applications.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | |
| Part Number | 12575509 |
| Outer Diameter | 70.00 mm (2.756 inch) |
| Width | 31.00 mm (1.220 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: 12575509, 1754078J00, 55190691
Reference Numbers (Interchange):
GATES: T38146
INA: 534 0105 10
SKF: VKM31001
FEBI BILSTEIN: 30686
RUVILLE: 55108
Vehicle Fitment
ALFA ROMEO 159: 2.4 JTD 2005-2011, 3.2 V6 2005-2011
ALFA ROMEO BRERA: 2.4 JTD 2005-2011, 3.2 V6 2005-2011
ALFA ROMEO SPIDER: 2.4 JTD 2006-2011, 3.2 V6 2006-2011
CADILLAC BLS: 2.8 V6 2006-2009, 2.4 2006-2009
FIAT STRADA: Compatible models
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Direct OE replacement for Alfa Romeo and Cadillac applications with 12575509 / 1754078J00.
- 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 T38146, INA 534010510, and SKF VKM31001 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 12575509, 1754078J00, and 55190691.
Installation Notes
- This tensioner is designed for the accessory drive belt system on Alfa Romeo 159, Brera, Spider and Cadillac BLS models equipped with 2.4L and 3.2L 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
