1345A031 Mitsubishi TENSIONER,ALTNTR BELT AUTO, Price: 59.82$, Weight: 1.04kg

Alternator Belt Automatic Tensioner ⚙️

This unit keeps the serpentine/alternator belt at the right tension so your charging system, water pump, A/C, and power steering work as intended. It prevents slip, noise, and premature belt wear, delivering stable voltage and smooth accessory drive in daily traffic and long trips.

Why it’s needed

Belts stretch with heat and age. Without a reliable automatic tensioner, the alternator cannot charge the battery correctly, accessories lose efficiency, and the belt can glaze or jump, risking an unexpected breakdown.

How it works

A preloaded spring and a sealed bearing pulley press on the belt. The arm pivots to follow engine vibration and thermal changes, keeping constant force and perfect belt tracking. A damping feature controls flutter for quiet, stable operation.

What if it fails ❗

Common signs: cold-start squeal, flickering lights, battery warning lamp, weak A/C, heavy steering, overheating (if the pump shares the belt), frayed belt edges, or a wobbling pulley. Left unchecked, the belt may snap and strand you, and other pulleys/bearings can be damaged.

Pro tips

Inspect belt ribs; replace if cracked or glazed. Use the hex boss to relieve tension safely, follow the routing diagram, and torque mounting bolts to spec. OE-grade materials and corrosion-resistant coating ensure long, quiet service.

Compatibility

• Outlander