Product Review
This is the tensioner pulley, also known as the adjusting pulley and lower pulley. This pulley is mounted on the belt tensioner near the center of the belt assembly. The upper and lower pulleys are known to be the primary sources for 'belt squealing'. This pulley is also encased in rubber which will crack over time. If left without service the rubber could fail completely, chucking the belt and leaving you stranded. Replacement is a very simple procedure and can be done anytime the fan is off the engine (belt replacement, water pump service, alternator replacement, etc).
- For compatible BMW E34 with M50, E36 with M42/M44/M50/M52/S50/S52, E39 with M52/M54, E46 with M52/M54/S54, E53 with M54, E60 with M54, E83 with M54, Z3 with M44/M52/M54/S52/S54, and Z4 with M54/S54
- Replacement deflection pulley for cars with HYDRAULIC alternator belt tensioners with centered hole
- Only for use with hydraulic (shock type) belt tensioner. Verify tensioner type before ordering.
- Manufactured to OE tensioner pulley dimensions for proper clearances and belt alignment
- High-strength alloy or composite pulley construction withstands brutal engine heat and vibration
- Durable surface coating resists corrosion (metal models)
- 24 Month Unlimited Mileage Warranty
