Description
Alternator VALEO CL15 for Citroën and Peugeot vehicles. Generator – Charging Current: 150 A. With Overrunning (Freewheel) Pulley.
High-output Valeo CL15 alternator designed as a direct replacement for many Citroën and Peugeot petrol and diesel engines. With a 150 A nominal charging capacity and an overrunning pulley to reduce belt shock, this unit supports vehicles with increased electrical demand — lighting upgrades, audio systems, and additional electronics — while maintaining stable battery charge. The alternator is a common OE fit for models that use reference numbers such as 9646321780 and 5705AS, making it a practical choice for professional workshops and DIY mechanics looking for a reliable, plug-and-play solution.
Technical Information
- Manufacturer: Valeo
- Model: CL15
- Product Codes: 9646321780, 5702E3, 5705AS
- Other Numbers: 5705EY, 5705NH, 1638095180
- Output: 150 A
- Pulley Type: Overrunning (Freewheel) Pulley
Compatibility
Commonly Used On: Citroën C2, Citroën C3, Citroën C3 Picasso, Citroën C3 Pluriel, Citroën C4, Citroën C4 II, Citroën C4 Picasso, Citroën C5, Citroën C5 X7, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807. Always match connector type, pulley style and mounting points with the vehicle unit when selecting a replacement.
Installation Recommendations
- Disconnect the battery before starting work to avoid short circuits and electrical damage.
- Remove the drive belt and relieve tension using the appropriate tensioner tool. Inspect the belt and tensioner; replace if worn.
- Label and disconnect all electrical connectors and remove the alternator mounting bolts. Note bolt locations for correct reassembly.
- Fit the new alternator, tighten mounting bolts to the manufacturer’s torque specifications, reconnect electrical plugs and reinstall the belt with correct tension.
- After installation, reconnect the battery and verify charging system operation with a multimeter or charging system tester (engine running: typically around 13.8–14.6 V depending on vehicle).
- Check for unusual noises or belt slip. Ensure the overrunning pulley type matches the removed unit to preserve belt life and drivability.
Why This Part Most Often Fails
Alternators typically fail due to a combination of mechanical and electrical wear: worn brushes and slip rings, failed voltage regulator, diode/rectifier pack faults, bearing seizure or wear leading to noise and overheating, contamination from oil or coolant leaks, and excessive load caused by electrical accessories or a weak battery. Heat and extended high electrical demand accelerate internal component degradation. Regular inspection of the drive belt, battery condition and electrical connections helps extend alternator life.
Notes For Mechanics And DIYers
This Valeo CL15 unit provides a robust 150 A output suitable for vehicles with higher-than-standard electrical loads. Many customers search by OE numbers (for example 9646321780 or 5705AS), so listing these references helps ensure correct selection. When replacing, confirm pulley type (overrunning/freewheel) and connector arrangement to guarantee fitment. Proper installation and testing will restore charging performance and avoid repeated workshop visits.
