Description
Glow plug relay CARTIER for Citroën and PEUGEOT vehicles. Used part with functional warranty.
The Cartier glow plug relay (part numbers 9640469680 / 598140) is a direct-fit electrical relay used in a range of diesel Citroën and Peugeot models to control current flow to the glow plug circuit during cold starts. This replacement relay is aimed at professional mechanics and skilled DIYers who maintain Stellantis diesel engines. Correct identification by part number improves fitment certainty and speeds up repairs.
Features And Function
The glow plug relay supplies and times the high current required by the glow plugs during engine warm-up. It receives a control signal from the engine management system and closes the high-current circuit to the glow plug bank for a predetermined preheat period. Common keywords: Glow Plug Relay, Cartier Relay, 9640469680, 598140, Citroën Glow Relay, Peugeot Glow Relay.
Technical Information
- Manufacturer: CARTIER
- Model: Citroën C4 Picasso, Citroën C5, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807
- Product Codes: 9640469680, 598140
- Additional Numbers: Stellantis / Citroën / Peugeot references
Installation Recommendations
Before starting, always disconnect the negative battery terminal to prevent short circuits. Locate the glow plug relay in the engine bay relay/fuse box or on the bulkhead depending on vehicle model. Remove electrical connectors and any securing bolts, swap the relay for the replacement, reconnect all plugs and the battery, then perform a quick glow system check: switch ignition to preheat position and observe the glow indicator and current draw. If available, check glow plug resistance and relevant fuses/ground connections before and after replacement.
Why This Part Most Commonly Fails
Glow plug relays fail primarily due to age-related wear and harsh operating conditions: repeated thermal cycling, corrosion on terminals or connector pins, contact erosion inside the relay, or moisture ingress. High mileage diesel vehicles and vehicles exposed to road salt or frequent cold starts are at higher risk. Failure results in difficult cold starts, long cranking times, or glow-plug fault codes.
Typical Replacement Guidance
There is no strict service interval for glow plug relays; replacement is condition- and symptom-driven. Signs you need a new relay include glow-plug warning light, extended cranking on cold starts, or diagnostic trouble codes pointing to the glow system. During replacement, inspect glow plugs, wiring harnesses and fuses to ensure the problem is isolated to the relay.
Designed for mechanics and experienced DIYers, this Part Number 9640469680 / 598140 relay offers direct compatibility with the listed Citroën and Peugeot models. Use proper tools and follow safe workshop practices when replacing electrical components.
