This high-output VALEO CL15 150A alternator is designed for a range of Citroën and Peugeot petrol and diesel applications where reliable charging under load is required. Featuring a freewheeling (overrunning) pulley to reduce belt stress and noise, this unit is suitable for workshops and experienced DIYers who maintain late-model PSA Group vehicles. Compatible with common OEM and aftermarket reference numbers, it delivers stable charging performance for demanding electrical systems and accessories.

Technical Information

• Manufacturer: Valeo
• Model: CL15 150A
• Product Codes: 9665617780, 9646321780, 1638095180
• Additional Numbers: 5702E3, 5705AS, 5705EY, 5705NH, 5702000
• Output: 150 A
• Nominal Charging Voltage: 13.8–14.5 V
• Pulley Type: Overrunning (Freewheeling) Pulley
• Typical Features: Integrated Voltage Regulator and Diode Rectifier

Compatible Models

• Citroën Berlingo
• Citroën C2
• Citroën C3
• Citroën C4
• Citroën C4 Picasso
• Citroën C5
• Citroen C5 X7
• Peugeot 206
• Peugeot 307
• Peugeot 407
• Peugeot Partner

How To Replace

1. Prepare Vehicle: Park on a level surface, engage handbrake and remove any jewelry. Disconnect the negative battery terminal before beginning work.
2. Remove Drive Belt: Release tension on the accessory belt tensioner and remove the belt from the alternator pulley. Inspect belt and tensioner for wear; replace if necessary.
3. Disconnect Electrical Connectors: Unplug the alternator multi-pin connector and the main output (B+) cable. Mark connections if needed to ensure correct reassembly.
4. Unbolt Alternator: Remove mounting bolts and lower the alternator from its bracket. Take care with the overrunning pulley assembly to avoid impact.
5. Install New Unit: Position the replacement alternator, tighten mounting bolts to secure fitment, reconnect electrical connections and refit the drive belt with correct tension.
6. Final Checks: Reconnect the battery, start the engine and verify charging voltage (typically 13.8–14.5 V) and listen for abnormal noises. Perform a charging system load test if possible.

Installation Recommendations

• Always disconnect the negative battery terminal before removal and installation.
• Inspect Drive Belt, Pulleys And Tensioner: A worn belt or faulty tensioner shortens alternator life and may cause charging faults.
• Ensure Clean Electrical Connections: Corroded or loose B+ and earth connections cause voltage drops and charging issues.
• Verify Belt Alignment And Tension: Incorrect tension accelerates bearing wear and may damage the overrunning pulley.
• Test Charging System After Fitment: Confirm output under load and at idle; expected voltage range is 13.8–14.5 V.
• Recommended For Professionals: For accurate belt tensioning and electrical checks, use workshop tools and diagnostic equipment.

Why This Part Most Commonly Fails

• Bearing Wear: Engine run time and contamination can cause bearings to wear, producing noise and eventual seizure.
• Brush And Slip Ring Wear: Over time brushes wear and lose contact, reducing charging capability.
• Regulator Or Diode Failure: Thermal stress or electrical spikes can damage the internal regulator or rectifier diodes, causing undercharging or charging faults.
• Overheating And Contamination: Oil leaks, coolant ingress or persistent belt slippage reduce lifespan.
• Pulley And Belt Issues: A damaged or locked overrunning pulley or incorrect belt tension accelerates failure modes.

Part numbers and vehicle fitment listed above are provided to help locate the correct unit quickly. This alternator is aimed at professional workshops and experienced DIY mechanics who require a direct-fit, high-output charging unit for affected Citroën and Peugeot models.

Product Overview

This VALEO CL15 150A alternator is a direct-fit charging unit commonly used on a range of Citroën and Peugeot models. With a 150 amp output and a freewheel (one-way) pulley, the unit supplies stable charging current for modern electrical systems while reducing belt shock during deceleration. The alternator is suitable for professional workshops and experienced DIY mechanics who need a reliable replacement part identified by common OEM numbers.

Technical Information

Manufacturer: Valeo

Model: CL15 Alternator

Product Codes: 9646321780, 5702E3, 5705AS

Other Numbers: 5705EY, 5705NH, 1638095180, 150A

Compatibility

• 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

How It Works And What It Does

The alternator converts mechanical energy from the engine into electrical energy to charge the battery and power vehicle electrical systems. A 150 A rating ensures sufficient capacity for vehicles with multiple electrical loads. The freewheel pulley (one-way pulley) decouples the alternator rotor from belt shock during rapid deceleration, which helps protect the belt drive and smooth engine braking effects.

Common Symptoms Of Failure

• Battery warning light on the dashboard or irregular charging voltage.
• Frequent battery discharge or inability to hold charge.
• Unusual noises from the alternator area (bearing rumble, grinding).
• Electrical accessories dimming or intermittent failures at idle.

Why The Part Most Often Fails

Typical causes of alternator failure include bearing wear due to age or contamination, voltage regulator malfunction, diode bridge failure, brush wear, overheating from poor ventilation, and belt or pulley issues. Vehicles operating in harsh conditions (frequent short trips, heavy electrical loads, or contaminated engine bays) tend to accelerate wear. The freewheel pulley can also fail internally, producing noise or reducing charging efficiency.

Replacement Frequency

Alternator lifespan depends on driving style and environment. Under normal conditions many alternators last well over 100,000 km, but heavy urban use, frequent short journeys, or exposure to oil/water contamination can shorten service life. Inspect the charging system during regular maintenance intervals and replace the alternator when charging performance or mechanical integrity is compromised.

Installation

1. Disconnect the negative battery terminal before any work.
2. Remove the drive belt (note belt routing) and any obstructing components.
3. Disconnect electrical connectors and the main charging cable from the alternator.
4. Remove mounting bolts and withdraw the alternator from its bracket.
5. Fit the replacement alternator, tighten mounting bolts to the manufacturer’s specification, reconnect electrical connections and refit the drive belt with correct tension.
6. Reconnect the battery and verify charging voltage at idle and under load (typically around 13.8–14.6 V with engine running).

Installation Recommendations

• Always Disconnect Battery Before Work To Avoid Short Circuits Or Damage.
• Inspect And Replace The Serpentine Belt And Tensioner If Showcasing Wear.
• Check Ground Connections, Battery Condition, And Charging Voltage After Installation.
• Ensure Proper Pulley Alignment To Prevent Premature Belt Wear.
• Use Correct Tools And Torque Values Where Specified By The Vehicle Manufacturer.

Notes For Professionals And DIYers

This alternator is aimed at workshops and experienced DIYers who can identify parts by OEM numbers. When replacing the unit, verify the fitment against the vehicle’s existing alternator mounting and connector layout. If uncertain about electrical diagnostics or belt systems, consult workshop documentation or a qualified technician.

Designed to replace original equipment, the installation of the Valeo CL15 is straightforward, suitable for both professional mechanics and DIY enthusiasts. Common causes of alternator failure include wear of the internal components over time, but this carefully sourced unit ensures your vehicle maintains optimal charging performance.

Technical Information

• Manufacturer: Valeo
• Model: CL15 150A
• Product Codes: 9646321780, 0124525035, 5702E3, 5705AS, 5705EY, 5705NH, 1638095180
• Additional Codes: 5705AS, 5705EY, 5705NH, 1638095180

This part is compatible with a wide range of Citroën and Peugeot vehicles, including Citroën C4, C4 Picasso, C5, C8, and Peugeot 307, 407, and 807 series. Its broad compatibility makes it a popular and versatile choice within alternator replacements.

For best results, make sure this alternator matches your vehicle’s specifications. Our customer support is available to help with any questions to ensure you select the correct part.

Opt for this Valeo CL15 alternator to restore your vehicle’s electrical system reliability and enjoy long-term performance. Our team is dedicated to helping you find the perfect components for your automotive needs.