Peugeot 5008 1.6 HDi Mk1

The 1.6 HDi uses an additive-assisted DPF regeneration system with Eolys fluid injection. Short trips under 20 km prevent the exhaust from reaching the 450-550 degrees needed for regeneration, causing progressive soot buildup. Symptoms start with a dashboard warning, then escalate to limp mode. A forced regeneration at a garage costs around 150-250 euro. Professional chemical cleaning runs 250-400 euro. Full DPF replacement with an aftermarket unit costs 500-800 euro fitted, while a genuine Peugeot DPF can exceed 1,200-1,500 euro. Cars with regular motorway use rarely have this problem. The Eolys additive needs topping up roughly every 120,000 km (around 100-150 euro).

The exhaust gas recirculation valve on the DV6C engine is prone to carbon fouling, especially on cars used for short trips or gentle driving. Symptoms include rough idle, loss of power, hesitation during acceleration, increased fuel consumption, and engine management light. The valve can sometimes be cleaned for around 100-150 euro, but if the internal mechanism is damaged, replacement is needed. An aftermarket EGR valve costs around 100-200 euro with 1-2 hours labor. A genuine Peugeot replacement costs around 500-800 euro fitted. Regular motorway driving helps prevent carbon buildup.

The variable geometry turbo on the 1.6 HDi can suffer from a sticking actuator, particularly on cars driven very gently or used only for short trips. Carbon deposits build up on the actuator mechanism, preventing proper boost control. Symptoms include turbo lag, juddering under acceleration, and engine warning lights. The actuator can sometimes be freed and adjusted for 150-300 euro. If the turbo internals are damaged, a refurbished turbo costs 600-900 euro fitted, while a new genuine unit runs 1,200-1,800 euro. Pre-2014 cars had higher turbo failure rates linked to blocked oil feed pipes. Always replace the oil feed pipe when fitting a new turbo.

The 1.6 HDi uses copper washers and plastic protectors to seal the injectors into the cylinder head. Over time these degrade, allowing combustion gases to escape upward. The telltale sign is a regular hissing or chuffing noise from the top of the engine at idle, and sometimes an exhaust gas smell entering the cabin through the ventilation. With the bonnet open you may see carbon deposits or even smoke around the injector wells. Replacement of all four injector seal kits costs around 20-30 euro in parts, but labor varies. An independent garage typically charges 100-200 euro total. If ignored, carbon buildup around the injector wells makes later removal much more difficult and can damage injector seats, pushing costs to 400-600 euro. Ensure the correct seal kit is used (Bosch vs Continental injectors use different kits).

The 5008 Mk1 uses an electronic parking brake system that is more complex than a traditional handbrake cable. Common failures include the EPB switch on the dashboard, the electric motors inside the rear brake calipers, and wheel speed sensor issues that cause the system to throw errors. A faulty switch is the cheapest fix at around 50-150 euro fitted. A defective caliper motor was quoted at around 500 euro to replace at one Peugeot dealer. Full EPB module replacement can cost 600-800 euro. Diagnosis requires Peugeot-specific software (Diagbox/Lexia) as generic OBD readers often cannot communicate with the EPB system.

A well-documented issue on the DV6 engine family. Oil leaks appear at the junction between the cylinder head and the cam cover/carrier, usually at the rear of the engine near the EGR valve. It was caused by insufficient sealant application at the factory on certain production batches. A Peugeot TSB exists for this problem. The fix involves removing the cam cover, cleaning the mating surfaces, and resealing with proper sealant. At an independent garage this typically costs 200-350 euro. However, the leak can be persistent and may require multiple attempts. If the machined surfaces are damaged, more extensive work is needed, potentially costing 500-700 euro.

The BSI (Built-in Systems Interface) is the central body control module that manages many electrical functions. Faults in the BSI can cause random dashboard warning lights, indicators not working, central locking problems, and intermittent starting issues. A BSI reset (disconnecting the battery and following a specific reboot procedure) sometimes resolves the issue at zero cost. Software updates through a Peugeot dealer cost around 100-200 euro. If the BSI module itself needs replacement, expect 400-800 euro including coding and programming, which must be done at a dealer or specialist with Diagbox software.