Description
Glow Relay CARTIER for Citroën and PEUGEOT vehicles. Used part with functional guarantee.
This Glow Relay from CARTIER is a direct-fit electrical component commonly used in diesel models from Citroën and Peugeot. Ideal for professional workshops and experienced DIY mechanics, this relay controls the pre-heating circuit for glow plugs, ensuring reliable cold-start performance. Frequently searched by OE numbers 9640469680 and 598140, this relay is a practical replacement when the engine struggles to start in low temperatures or when the glow-plug circuit shows intermittent faults.
Key Features
- Direct replacement for OE Numbers: 9640469680, 598140.
- Designed for glow-plug control circuits on diesel engines.
- Sturdy contacts and coil rated for repeated switching cycles.
- Useful for both workshop repairs and competent home mechanics.
Benefits For Mechanics And DIYers
Replacing a faulty glow relay restores reliable pre-heating timing and prevents long cranking times or no-start situations in cold weather. The relay is compact, straightforward to swap, and significantly cheaper than replacing multiple glow plugs or associated wiring when diagnosed correctly. Listing OE numbers and compatible models in the product title improves findability for technicians and parts managers searching by part number.
Installation
Typical replacement steps (general guidance; follow vehicle manufacturer’s procedure):
- Disconnect the negative battery terminal before starting work to prevent short circuits.
- Locate the relay—usually in the engine bay fuse/relay box or, on some models, inside a dedicated relay carrier.
- Note wiring positions or take a photo to ensure correct reconnection.
- Remove the old relay by pulling it straight from its socket or releasing retaining clips; avoid bending pins.
- Fit the replacement relay into the socket, ensuring full seating and correct orientation.
- Reconnect the battery and verify operation: check glow plug circuit activation, dashboard preheat indicator behavior, and engine start performance.
Common Failure Causes
- Contact Wear Or Corrosion: High switching currents through the relay contacts can cause pitting, increased resistance, or welding of contacts over time.
- Coil Fatigue Or Open Circuit: Electrical stress and heat cycles can degrade the coil insulation or connections, causing the relay to stop energizing.
- Overload From Faulty Glow Plugs Or Wiring: Excessive current draw from failing glow plugs or shorted wiring can overload the relay and shorten its service life.
- Environmental Damage: Moisture ingress, road salt and vibration accelerate deterioration of relay internals and terminals.
Technical Information
- Manufacturer: CARTIER
- Model: Citroën C4 Picasso, Citroën C5, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807
- Product Codes: 9640469680, 598140
- Additional Numbers: 598140 | 9640469680
Mounting Recommendations
- Always disconnect the battery before removing or installing the relay.
- Inspect socket terminals and wiring for corrosion or heat damage; clean or repair as needed to ensure low-resistance connections.
- Use dielectric grease sparingly on external terminals to reduce corrosion risk where applicable.
- After installation, verify glow system operation and perform a road test in cold conditions if possible to confirm correct function.
Why This Part Is Worth Installing
Replacing a failing glow relay is a cost-effective repair that directly resolves cold-start and glow-plug circuit faults. For workshops managing diesel vehicle maintenance, stocking this relay under its OE numbers (9640469680, 598140) helps speed diagnosis and turnaround times on cold-start complaints.
