Peugeot 2008 Mk2 1.5 BlueHDi

This is the most significant issue with the 1.5 BlueHDi engine. Early engines (October 2017 to January 2023) used a 7mm camshaft chain that is prone to stretching over time, influenced by soot accumulation in the oil. Symptoms include a rattling noise on cold start that disappears once warm. If the chain snaps, pistons and valves collide, destroying the engine. The chain kit replacement costs approximately 1,500 euros at an independent garage. If engine damage has occurred, a replacement engine costs 5,000-7,000 euros. Stellantis has acknowledged this as a major issue with a recall affecting over one million cars across Europe. They now offer extended coverage of 10 years or 240,000 km, covering 100% of parts and labor, provided the car was maintained according to manufacturer guidelines with approved oil. Later engines (post-January 2023) received an upgraded 8mm chain that is considered reliable. You can identify the chain type by the camshaft cover part number: 9812647280 indicates the 7mm chain, 9830580480 the upgraded 8mm version.

The AdBlue (urea/SCR) system is a common trouble area on all BlueHDi engines. The injector can crystallize and block, especially in cold weather, while the pump's internal circuit board can be contaminated by the AdBlue fluid itself. Symptoms include the urea warning light, engine management light, and a countdown message warning that the car will not restart after a set number of miles. An AdBlue injector replacement costs around 300-500 euros. If the entire tank and pump assembly need replacing, costs rise to 1,200-2,000 euros. The NOx sensor, which monitors the system, can also fail independently at a cost of around 500-800 euros. These issues are more common in cars driven mainly in cold conditions or those sitting idle for extended periods.

Like all modern diesels, the 1.5 BlueHDi requires periodic DPF regeneration, which happens automatically during sustained driving above 60 km/h for 15-20 minutes. Cars used predominantly for short urban trips will accumulate soot in the DPF faster than it can be burned off. When the filter reaches approximately 45% blockage, a warning light appears. If ignored, the car enters limp mode. A forced regeneration at a garage costs around 150-250 euros. If the DPF is too heavily blocked, replacement costs 1,500-2,500 euros. Using C2 or C3 grade low-SAPS oil is essential. The DPF additive (Eolys) is not user-serviceable on the 1.5 BlueHDi as the system manages it differently from older Peugeot diesels, but the additive reservoir may need refilling around 120,000-130,000 km.

Short-distance driving causes carbon to accumulate in the EGR valve, which is located at the rear of the engine and is not easy to access. Symptoms include reduced power, rough idling, and increased fuel consumption. The EGR valve on the 1.5 BlueHDi can typically be cleaned rather than replaced, at a cost of around 250-400 euros. If the valve is beyond cleaning, replacement including labor costs approximately 500-800 euros. Specialist advice is to clean the EGR every 50,000 km as preventive maintenance. Regular motorway driving helps keep the valve cleaner.

The i-Cockpit infotainment system can suffer from intermittent blank screens, where the display fails to turn on at engine start. The touch bar below the screen also becomes unlit. This is primarily a software/firmware issue rather than hardware failure. A software update at a Peugeot dealer may resolve the issue, often for free if still under warranty. Peugeot has released updates to address this, though some owners report the problem returning. If the display unit itself has failed, replacement costs approximately 400-500 euros. The issue does not affect driving safety or mechanical function but is an inconvenience, particularly as climate controls are managed through the touchscreen.

While less common than on the older 1.6 HDi, the 1.5 BlueHDi can develop fuel injector issues, particularly if low-quality diesel is used regularly or the fuel filter is not replaced on schedule. Symptoms include rough idling, excessive exhaust smoke on acceleration, hard starting, and inconsistent power delivery. A single injector replacement costs approximately 400-600 euros, with labor around 1-2 hours. If multiple injectors need replacing, the total can reach 1,200-1,500 euros. Stellantis issued a TSB recommending periodic fuel system cleaning and the use of high-quality diesel to prevent clogging.