PIX Auto Belt Tensioners are self-adjusting devices built around a robust torsion-spring mechanism that improves alignment and durability while eliminating the need for additional friction-reducing components. They deliver consistent belt tension, eliminating slip, noise and vibration for smoother, quieter accessory drive operation, and automatically compensate for belt stretch and wear over the service life of the belt.

PIX Idler Pulleys guide and support the drive belt to maintain correct routing, alignment and smooth operation. Plastic idlers are manufactured from glass-reinforced Nylon 6/6 for lightweight, durable performance with a moulded-in ball bearing, ideal for both backside and groove-side applications. Steel idlers are precision stamped or machined with a close-tolerance ball-bearing pocket, most with electro-deposited epoxy coating for corrosion resistance and a crowned running surface for proper belt tracking – suited to high-heat, demanding engine conditions.

• Passenger car & commercial vehicle serpentine belt drives
• Alternator, water pump & power steering drives
• Air-conditioning compressor drives
• Engine accessory belt systems
• Automotive aftermarket & OE replacement
• Industrial & off-highway engine drives

• Automatically maintains correct accessory belt tension
• Maintains correct alignment with the belt
• Dampens normal accessory system vibrations
• Eliminates need to adjust / re-tension the belt
• Prevents belt slip, noise & excessive belt wear
• Indicates excessive belt stretch for timely replacement
• Extends accessory system component life
• Sealed, service-free idler pulley bearings

Exact tensioner and idler pulley part numbers are vehicle/engine-model specific. Please share your vehicle make, model and engine variant (or existing OE/part number), and our team will confirm the correct PIX Auto Belt Tensioner or Idler Pulley for your application.