Description
Tensioner for alternator and air conditioning belt for Citroën C1 and Peugeot 107
This belt tensioner is a direct-fit replacement designed for the accessory drive on Citroën C1 and Peugeot 107 engines. It maintains correct tension on the alternator and air conditioning drive belt, helping to ensure reliable charging, climate control operation and proper accessory drive function. The unit matches OE fitment and common OEM reference numbers, making it a suitable choice for workshops and DIY mechanics looking for a straightforward replacement part.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C1, Peugeot 107
- Product Codes: 128143, 5708A0
- Other Numbers: 6822QX, 6822TH
Function And Benefits
The tensioner keeps the alternator and air conditioning belt at the correct tension to prevent slip, reduce bearing loads and avoid premature belt wear. A healthy tensioner ensures consistent alternator output, reliable air conditioning compressor drive and quieter operation. Replacing a worn tensioner restores proper belt alignment and tension without the need for repeated adjustments.
Installation Recommendations
- Preparation: Park the vehicle on a level surface with the engine cool. Verify you have the correct belt routing diagram before starting.
- Removal: Relieve belt tension using the appropriate tensioner tool or wrench, remove the drive belt from the pulleys and unbolt the old tensioner (retain or replace mounting hardware per vehicle recommendations).
- Fitment: Mount the new tensioner and tighten fasteners to the manufacturer’s specified torque. Reinstall the drive belt following the proper routing. Rotate the engine by hand one turn (with ignition disabled) to confirm correct seating.
- Checks: Start the engine and observe belt alignment, tension and listen for abnormal noise. Inspect pulley runout and ensure there is no rubbing against adjacent components.
- Workshop Tip: Replace the drive belt at the same time if it shows glazing, cracks or uneven wear. Always follow the vehicle manufacturer’s service procedure and torque specifications.
Why This Part Fails Most Often
- Bearing Wear: The tensioner pulley bearing can wear out over time, producing noise and reduced rotation smoothness.
- Loss Of Tension: Internal spring fatigue or failure causes insufficient belt tension, leading to belt slip and charging or A/C performance issues.
- Pulley Damage: Impact, contamination or belt misalignment can damage the pulley surface, accelerating belt wear.
- Contamination: Oil or coolant leaks that reach the pulley accelerate bearing and belt degradation.
Compatibility And Notes
Commonly searched by OE and aftermarket codes (128143, 5708A0, 6822QX, 6822TH). Designed for Citroën C1 and Peugeot 107 accessory drive systems. When ordering, customers often use the product codes above to locate the correct item quickly.
Practical Advice For Mechanics
Keep a replacement tensioner and belt on hand for vehicles with high mileage or when performing A/C or alternator service. During installation, always confirm pulley alignment and replace any perished or glazed belts. Proper installation reduces comebacks and prevents secondary damage to the alternator or compressor.
