Peugeot 3008: EAT8 (8-Speed Automatic) Solenoid Valve Failure

The Aisin-sourced EAT8 eight-speed automatic transmission fitted to both petrol and diesel 3008 variants is prone to solenoid valve failure causing erratic gear changes, harsh engagement, or refusal to select drive or reverse. Peugeot issued a technical update and software calibration in 2018-2020 but hardware solenoid failure requires valve body replacement. The fault worsens if the transmission has been allowed to overheat or if fluid was not changed at the recommended interval.

• Harsh or shuddering engagement when pulling away from a standstill, especially when cold
• Unexpected neutral slip, flare, or jerk between gear changes under moderate acceleration
• Transmission warning light illuminated with codes referencing solenoid circuit faults
• Delay of 2-3 seconds or more when selecting Drive or Reverse from Park
• Gearbox entering limp-home mode (locked in third gear) under sustained motorway driving

1. 1

   Test drive in stop-start traffic and on the motorway, checking for any judder, clunk, or delay when pulling away from rest, and for any harshness when the gearbox kicks down under acceleration.

2. 2

   Verify transmission fluid has been changed within the last 60,000 km.

3. 3

   If a workshop inspection is possible: With the engine at operating temperature, check for any transmission warning light or gearbox-related fault codes via OBD scanner.

Parts involved: Mechatronic / valve body.

$800 to $3,200 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the gearbox fluid ever been changed, and at what mileage?”
• “Has the car ever shown a gearbox warning light, or been to a dealer for any transmission-related software update?”
• “Does the gearbox feel smooth pulling away from cold, or is there any shudder or hesitation in the first few gear changes?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.