Description
Glow Relay CARTIER for Citroën and PEUGEOT Vehicles. Used Part With Functional Warranty.
This glow plug relay (manufactured by Cartier) is designed for diesel PSA engines used in various Citroën and Peugeot models. It controls power supply to the glow plugs during cold starts, ensuring rapid and reliable engine ignition. The unit is commonly sought under OEM numbers 9663696380 and 598140 and is suitable for professional workshops as well as experienced DIY mechanics performing diesel system repairs.
Key Benefits
– Direct replacement for original relay units used on many PSA diesel models.
– Restores proper glow-plug operation: faster cold starts, reduced white smoke and smoother idling until the engine reaches operating temperature.
– Supplied used but checked for functionality and supplied with a functional warranty.
Technical Information
- Manufacturer: Cartier
- Model: For Citroën and Peugeot diesel vehicles
- Product Codes: 9663696380, 598140
- Additional Numbers: Common PSA OEM references (see product codes above)
Compatibility (Examples)
Frequently fitted to the following models (verify fitment by part number):
- Citroën C4 Picasso
- Citroën C5
- Peugeot 307
- Peugeot 407
Function And Typical Faults
The glow relay supplies and times current to the glow plugs and often also supervises glow-plug duration according to engine temperature signals. Common failure modes include:
- Electrical contact wear or corrosion reducing current to glow plugs.
- Coil or internal contact failure preventing relay activation.
- Water ingress or contamination in the relay housing or connector causing intermittent faults.
- Overheating due to poor grounding or excessive current draw from faulty glow plugs.
Symptoms Of A Faulty Relay
- Hard cold starts or prolonged cranking time.
- Glow-plug warning lamp behaving abnormally (not lighting, flashing, or staying on).
- Excessive white smoke during start-up or rough idle until warmed up.
How It Is Replaced
Replacement is straightforward for a competent mechanic or experienced DIYer with basic electrical skills:
- Disconnect the negative terminal of the battery before any work to avoid short circuits.
- Locate the relay—usually in the engine bay fuse/relay box or mounted on the firewall/inner wing depending on model.
- Remove any protective covers, unplug the electrical connector and unscrew the mounting fasteners.
- Fit the replacement relay, secure mounting bolts, reconnect the electrical connector and battery.
- Perform a function check: confirm glow-plug lamp operation and, if possible, verify voltage/current to glow plugs during the glow cycle.
Installation Recommendations
- Always disconnect the battery before removal and follow the vehicle manufacturer’s guidelines to avoid damage.
- Inspect connector pins and wiring for corrosion or damage and repair if necessary; poor connections are a frequent cause of repeat failures.
- Check glow-plug resistance and battery voltage before replacing the relay to ensure the problem is not caused by faulty glow plugs or low system voltage.
- Use proper tools and, if possible, a multimeter or clamp meter to verify current flow during the glow cycle.
Why This Part Fails Most Often
Relay failures are most commonly caused by degraded electrical contacts (corrosion, arcing), water or dirt ingress into the connector/relay housing, and electrical stress from failing glow plugs that draw excessive current. Repeated high-current cycles and aging insulation also contribute to eventual relay breakdown.
