Module and electrical faults
Attaches to 508-MK1 at chassis level · Electrical · carried by 6 variants across 2 chassis
Overview
Module and electrical faults is a common fault recorded against 508-MK1 at chassis level, typically from 100–190k km. It shows up as warning lights that appear and clear, an infotainment screen that reboots, and occasional central-locking or parking-sensor faults. Where it's documented, the repair runs €150–€800 (battery at the cheap end, module replacement and coding at the dear end, costs dated 2026-07), and it can be partly checked before you buy. 6 variants across 2 chassis in this database inherit it.
What happens
Symptom. Warning lights that appear and clear, an infotainment screen that reboots, and occasional central-locking or parking-sensor faults.
Cause. These carry a lot of electronics and the connectors and modules age. As with most cars of this kind a tired battery is the most common root cause, though genuine module failures do happen.
How to check it
OBD scan
Scan every module rather than just the engine, work the infotainment and the parking sensors, and check the battery's age.
Mandatory. A seller who refuses a scan has answered the question.
Every variant that carries this
| Variant | Chassis | Body | Years | Risk | Good buy | Cost as % of good buy |
|---|---|---|---|---|---|---|
| 2.0 HDi DW10 | 508 | sedan | 2010–2018 | R2 | €2,200 | 22% |
| 2.0 HDi DW10 | 508 SW | wagon | 2011–2018 | R2 | €2,300 | 21% |
| 1.6 HDi DV6C | 508 | sedan | 2010–2018 | R3 | €1,850 | 26% |
| 1.6 HDi DV6C | 508 SW | wagon | 2011–2018 | R3 | €2,000 | 24% |
| 1.6 THP EP6 | 508 | sedan | 2011–2018 | R4 | €1,750 | 27% |
| 1.6 THP EP6 | 508 SW | wagon | 2011–2018 | R4 | €1,850 | 26% |
The last column is the point. The same repair is an inconvenience on one variant and a reason to scrap the car on another. A failure costing a quarter of the vehicle's value changes the purchase decision regardless of how rare it is.