The C4 Picasso Mk1 brought distinctive French MPV design to the compact segment, competing with the Renault Scenic and Volkswagen Touran. The 1.6 THP petrol option used the BMW/PSA-developed Prince engine (EP6DT), the same unit found in the Mini Cooper S, DS3, and Peugeot 207/208 GTi. Available from 2008, it offered 150-156 hp with reasonable fuel economy for a petrol MPV. Offered with a 5-speed manual or the EGS 6-speed automated manual gearbox.· more· less
Spacious cabin, versatile layoutPunchy turbo petrol performance
EP6 engine is high-maintenanceEGS gearbox can be troublesome
Buy if: You want a practical petrol MPV and can find one with a recently replaced timing chain, full service history, and manual gearbox.
Avoid if: You need low-maintenance ownership or cannot budget for EP6 engine weak points including timing chain, turbo, and high-pressure fuel pump repairs.
Price & maintenance
Used price
€4,000
median asking price, typically 125,000 km
Typical range€2,800 – €5,900
Maintenance cost
€900 – €1,750/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€500 – €850 /yr
Risk bufferunplanned repairs€400 – €900 /yr
Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Ownership costs
Maintenance assumes 15,000 km a year. Price estimates are based on German asking prices. Prices and costs vary by vehicle condition and location.
Hydraulic tensioner weakens, causing cold start rattle and potential catastrophic engine damage · more· less
The EP6DT engine is widely reported for premature timing chain stretch and tensioner failure. The hydraulic chain tensioner bleeds off oil pressure overnight, causing a distinctive rattle for several seconds on cold start. This typically develops between 60,000 and 100,000 km. If ignored, the chain can skip teeth and cause catastrophic valve-to-piston contact. Pre-2012 cars are most affected. PSA released updated tensioner and chain components. Replacement at an independent specialist costs approximately 1,200-1,800 for the full kit (chain, tensioner, guides, VVT hub gear), while a Citroen dealer charges 1,800-2,500. Citroen offered extended timing chain coverage on some cars for up to 7 years if fully dealer-serviced, though this is now expired for all Mk1 Picassos. If the chain has already skipped and caused valve damage, engine repair or replacement can reach 4,000-8,000.
Turbocharger housing cracks and bearing failure
€1,000 - 2,5002 of 8
Turbo housing develops hairline cracks and bearings fail, often from oil starvation · more· less
Hairline cracks in the twin-scroll turbo exhaust housing commonly appear after 60,000-80,000 km. The turbo bearings can also fail from oil starvation caused by blocked or deteriorated oil feed lines. Symptoms include loss of power, blue or white exhaust smoke, and rising oil consumption. The OEM diverter valve is another weak point; its plastic diaphragm retaining ring becomes brittle from heat cycling and can shatter, sending fragments into the compressor wheel. Aftermarket diverter valves from Forge or GFB (around 150-200) are a widely recommended preventive upgrade. A new OEM turbo with fitting costs 1,500-2,500 at an independent garage, while a reconditioned unit runs 1,000-1,500 installed.
High-pressure fuel pump failure
€600 - 1,5003 of 8
Camshaft-driven HPFP fails, causing limp mode, power loss, and rough running · more· less
The high-pressure fuel pump is a known weakness on the EP6 engine family. Failures typically occur between 60,000 and 100,000 km, manifesting as sudden power loss, limp mode, engine management light, and rough running. The pump is driven by the exhaust camshaft and wears internally over time. An OEM replacement pump costs approximately 400-600 for the part alone. Total replacement at a specialist runs 600-900, while a Citroen dealer charges 1,000-1,500. PSA updated the pump design on later production units. Some specialist workshops now offer refurbishment services for around 250-350.
Intake valve carbon buildup
€400 - 8004 of 8
Direct injection causes heavy carbon deposits on intake valves, reducing power and efficiency · more· less
As a direct-injection engine, the EP6DT sprays fuel directly into the combustion chamber rather than over the intake valves, so there is no fuel wash to keep the valves clean. Carbon residue from crankcase ventilation gases accumulates over time, causing up to 20% power loss, rough idle, and increased fuel consumption. This buildup typically becomes problematic every 50,000-60,000 km. Citroen dealers were reportedly having to decarbonise valves at just two to three years old on early cars. The only effective fix is walnut shell blasting or manual cleaning, costing 400-800 at a specialist. This issue produces no diagnostic fault codes, making it invisible to standard OBD scans.
Clutch and gear actuators fail, causing jerky shifts, hesitation, and gearbox fault warnings · more· less
If the C4 Picasso is equipped with the EGS 6-speed automated manual gearbox, be aware of known clutch and gear actuator problems. Symptoms include jerky gear changes (especially when cold), hesitation from standstill, and dashboard gearbox fault warnings. The actuator can malfunction due to internal wear, water ingress, or electrical faults. A clutch actuator replacement costs around 500-800 for the part, with total repair bills including labour reaching 1,000-1,500 at specialists and up to 2,000-3,000 at dealers if a complete clutch assembly with flywheel is also needed. PSA discontinued the EGS in favour of the EAT6 torque converter automatic, acknowledging the design's limitations. Manual gearbox models avoid this issue entirely.
Electric power steering pump failure
€500 - 1,2006 of 8
Electric power steering pump motor burns out or ECU fails, causing heavy or completely lost steering · more· less
The C4 Picasso Mk1 uses an electric power steering pump that can drain the battery even when the car is switched off, as the unit sometimes stays powered. This continuous draw can burn out the motor or its controlling electronics over time. Symptoms range from intermittent heavy steering to complete loss of power assistance. The fault code C1178 may indicate an ECU software update could help, but if no code is present, the pump itself typically needs replacement. A reconditioned pump costs around 250-450, with fitting adding 150-300 in labour. A new OEM pump with fitting at a dealer runs 800-1,200. Some specialist refurbishment services can repair the internal electronics for 200-400.
Thermostat housing and coolant leaks
€300 - 7007 of 8
Integrated electronic thermostat housing cracks from heat cycling, causing coolant loss · more· less
The EP6 engine uses a combined electronic thermostat and sensor housing located between the cylinder head and the air filter box. The plastic housing deteriorates with heat cycles and can crack, leading to coolant loss. If not caught early, overheating can cause head gasket failure or cylinder head warping. The combined thermostat/sensor unit costs approximately 100-200, with labour of 150-300 due to tight access. Additionally, the oil filter cooler gasket can be another source of coolant leaks. Total repair runs 300-500 at an independent garage, 500-700 at a dealer.
Air conditioning compressor premature wear
€500 - 1,0008 of 8
AC compressor fails prematurely, often after just 50,000 km on THP-equipped models · more· less
The 1.6 THP variant is specifically reported for premature air conditioning compressor failure, sometimes as early as 50,000 km. Symptoms include gradually declining cooling performance followed by complete AC failure. The compressor clutch may fail to engage, or internal components can seize. A replacement compressor costs 300-500 for an aftermarket unit, with labour of 200-300 including system evacuation and recharge. An OEM unit at a dealer runs 700-1,000 installed. The issue appears linked to higher thermal stress in the engine bay on THP models compared to diesel variants.
High-maintenance engine requires strict servicing and proactive repairs
The EP6DT Prince engine in the C4 Picasso Mk1 is widely regarded as a demanding powertrain. Timing chain, turbo, high-pressure fuel pump, and carbon buildup are all well-documented failure areas, with the timing chain being the most critical. Pre-2012 cars are most at risk. Short oil change intervals (every 10,000 km or annually with quality 5W-30 synthetic), preventive diverter valve replacement, and regular intake valve cleaning all help extend component life. EGS gearbox models add another layer of risk. Manual gearbox versions are notably more reliable. A well-maintained example with a recently replaced timing chain and full service history can provide acceptable service, but deferred maintenance on these engines tends to cascade into expensive compound failures.
Service history
Complete Citroën dealer or specialist records essential. Verify oil changes at maximum 12-month or 10,000 km intervals with correct 5W-30 fully synthetic oil.
Tires
Check tread depth, age (date codes), and uneven wear patterns. Standard tire size is 215/55 R16.
Cold start
Must start engine completely cold. Listen carefully for any rattling or chain noise in the first 30 seconds.
Test drive
Minimum 20 minutes including motorway speeds. Check for smooth power delivery, absence of warning lights, and gearbox behaviour.
Specific for this vehicle
Cold start timing chain rattle
Start engine completely cold and listen for rattling in first 5-30 seconds. Any audible chain noise indicates the tensioner is worn and the full timing chain kit needs replacing.
Turbo boost response and exhaust smoke
Accelerate firmly in 2nd and 3rd gear from 2,000 rpm. Power should build smoothly without hesitation. Blue or white smoke from the exhaust indicates turbo seal failure or oil consumption.
EGS gearbox operation (if equipped)
Drive for at least 15 minutes. Feel for jerky shifts, hesitation from standstill, or 'gearbox fault' warnings on the dashboard. Cold shunting is an early sign of actuator problems.
+ 4 more checksShow less
Power steering feel
Turn the steering wheel fully in both directions at low speed. Any sudden heaviness, groaning noises, or intermittent loss of assistance points to a failing electric power steering pump.
Check coolant level and condition
Low coolant suggests thermostat housing or oil cooler gasket leak. Brown or milky coolant indicates potential head gasket contamination.
Test air conditioning
Run the AC at maximum cold for 5 minutes. If cooling is weak or the compressor clutch cycles rapidly, compressor failure is likely. Known to fail early on THP models.
Run an OBD2 diagnostic scan
Check for stored and pending fault codes. Look for misfire codes (P1337, P1339, P1340), camshaft position codes (P000A, P000B), and fuel system codes indicating HPFP issues.
Recalls and Technical Service Bulletins
Starter motor wiring harness chafing (2006-2010 production) causing fire riskCritical - verify completed
Starter motor relay internal component nonconformity, risk of overheating (2006-2010 production)Verify completed
Electric parking brake cable insufficient holding force (2008 recall)Verify completed
Front seatbelt buckle malfunction on power-adjustable seats (2007 recall)Verify completed
Panoramic sunroof bonding defect, risk of detachment (367 vehicles affected, 2008)Verify if applicable
Contact a Citroën dealer with the VIN to verify all recalls have been completed. The starter motor wiring recall and Takata airbag recall are particularly important safety items. The Takata recall is a stop-drive order for affected vehicles until the repair is completed.
Warranty Status
Factory warranty (2 years)Expired on all Mk1 C4 Picassos
Extended timing chain coverageUp to 7 years if fully dealer-serviced (now expired for all Mk1)
Rust perforation warranty (12 years)May still apply to 2013-2014 models
All Mk1 C4 Picassos are well outside their original 2-year factory warranty. The extended timing chain coverage Citroën offered has also expired for all first-generation models. Third-party warranties are available but typically exclude known EP6 engine weak points.
Sources: Research draws on model-specific owner forums and owner communities, recall information from official authorities, German automotive press, and multiple workshop cost references cross-checked against each other.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.
