Overview

This Valeo CL15 alternator is a direct-fit replacement designed for Citroën and Peugeot models equipped with the 1.6 e-HDi engine and without Start-Stop functionality. It is commonly referenced by OE and supplier numbers, so many technicians and DIYers search by part number (for example 9664779680 or 5705KV) when sourcing a replacement. The unit restores reliable charging performance to the 12 V electrical system and is suitable for standard charging system configurations on the listed models.

Applications

Typical vehicle applications include (non-exhaustive list):

• Citroën C3 Picasso
• Citroën C4 II
• Citroën C4 Picasso
• Citroën C8
• Peugeot 3008 I
• Peugeot 301
• Peugeot 308
• Peugeot 5008 I
• Peugeot 807

Technical Information

• Manufacturer: Valeo
• Model: CL15 Alternator
• Product Codes: 9664779680
• Other Numbers: 9678048880, 1638094380, 5705KV, 5702J9
• Electrical System: 12 Volt Charging System (for vehicles Without Start-Stop)

How To Replace

Replacement of the alternator is a straightforward job for a trained technician and an experienced DIYer with basic tools. General steps:

• Disconnect Battery: Always disconnect the negative battery terminal before starting work.
• Release Belt Tension: Loosen the drive-belt tensioner and remove the accessory belt from the alternator pulley.
• Disconnect Electrical Connectors: Unplug the alternator electrical connector(s) and remove the main output stud nut and cable.
• Unbolt Alternator: Remove the mounting bolts and extract the alternator from its bracket.
• Fit New Unit: Position the new alternator, install and tighten mounting bolts to the manufacturer’s torque, reconnect electricals and refit the drive belt with proper tension.
• Reconnect Battery And Test: Reconnect the battery, start the engine and verify charging system operation (see Testing below).

Testing After Fitment

After installation, verify system voltage at the battery with the engine running; typical healthy charging voltage ranges around 13.8–14.6 V. Check for warning lights on the dash and confirm there are no unusual noises from the alternator or belt slip under load.

Installation Recommendations

• Always Disconnect Battery: Prevents short circuits and protects vehicle electronics.
• Inspect Accessory Belt And Pulleys: Replace worn belts and damaged tensioner/pulleys to avoid premature alternator wear.
• Ensure Correct Electrical Connections: Tighten output cable to specified torque and secure all connectors to prevent poor contact.
• Check Battery Condition: A weak or failing battery increases alternator load and can shorten alternator life.
• Use Proper Tools And Torque Settings: Avoid damage to mounting threads and electrical studs.

Most Common Failure Causes

Alternators of this type typically fail due to mechanical wear or electrical component degradation. Common causes include:

• Worn Bearings Causing Noise And Reduced Performance
• Brush And Slip Ring Wear Resulting In Poor Charging
• Diode Pack Or Voltage Regulator Failure Causing Undercharging Or Overcharging
• Contamination From Oil Or Coolant Leaks Leading To Electrical Faults
• Belt Slip Or Misalignment Increasing Mechanical Stress

Why Choose This Unit

Technicians and DIYers will appreciate that this Valeo CL15 alternator matches common OE reference numbers for the 1.6 e-HDi lineup without Start-Stop, making identification and fitment straightforward. When replacing a faulty alternator, ensure the chosen unit matches the vehicle’s connector, mounting orientation and pulley configuration for a trouble-free swap.

Keywords

Alternator Valeo CL15, Citroën Alternator, Peugeot Alternator, 1.6 e-HDi Alternator, 9664779680, 5705KV, 5702J9, 1638094380