
Maintains proper belt tension to prevent slippage and guides the belt smoothly across various engine auxiliary pulleys.
Select a brand to find parts compatible with your vehicle.
Select a brand to find parts compatible with your vehicle.
The idle pulley and tensioner are vital for maintaining the correct operation of the auxiliary drive belt. The tensioner applies constant pressure to prevent belt slip, while idler pulleys guide the belt path. Worn bearings in these components often cause squealing noises and can lead to belt misalignment or snapping, resulting in the failure of critical accessories like the alternator.