The facelifted second-generation C4 received the 1.2 PureTech three-cylinder turbo from 2015, available as 110 hp with a five-speed manual or 130 hp with a six-speed manual or EAT6 automatic. The engine brought better fuel economy than the outgoing 1.6 VTi it replaced, and the C4 continued to offer a comfortable ride and good cabin space for the compact segment. Reliability is dominated by the well-documented wet timing belt issue that affects all PureTech turbo engines from this era.· more· less
Wet timing belt degradation riskElectrical system prone to faults
Buy if: You want a comfortable compact with low fuel costs and can verify the wet timing belt has been replaced or the Stellantis extended warranty applies.
Avoid if: You mainly make short urban trips (accelerates belt degradation and oil dilution) or the car has no documented service history.
Price & maintenance
Used price
€7,000
median asking price, typically 100,000 km
Typical range€5,200 – €8,500
Kilometres drivenAll
Maintenance cost
€750 – €1,400/year
at 15,000 km/year
Fixed costsservice, tyres, brakes€450 – €750 /yr
Risk bufferunplanned repairs€300 – €650 /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.
Belt material breaks down in oil, releasing particles that clog lubrication system and can cause engine damage · more· less
The 1.2 PureTech uses a timing belt immersed in engine oil (wet belt). Over time, the belt material swells and degrades, especially in cars driven mostly on short trips where fuel dilution of the oil accelerates the process. Belt particles circulate through the lubrication system, clogging the oil pump strainer, variable valve timing solenoids, and vacuum pump. If caught early, a preventive belt replacement costs around €700-900 at an independent garage. If the belt degrades enough to cause oil starvation, the resulting engine damage can cost €3,000-5,000 or require complete engine replacement. Pre-2017 models are most affected as they had the original belt material. PSA issued a recall (code HFC for Citroën) primarily as a software update to detect vacuum pump failure earlier, but this did not replace the belt itself. Stellantis now offers an extended warranty covering 10 years / 180,000 km for belt and oil consumption issues, provided the car was serviced regularly. The recommended preventive replacement interval is 100,000 km or 6 years, but real-world failures have been seen as early as 40,000 km on short-trip cars.
Excessive oil consumption
€200 - 3,0002 of 5
Piston ring carbon buildup causes oil burning, some engines use 1 litre every 1,500-2,000 km · more· less
Many 1.2 PureTech engines consume oil at higher than normal rates. The oil control rings on the pistons can become clogged with carbon deposits, allowing excess oil to pass into the combustion chamber and burn. Consumption rates of 0.5-1 litre per 2,000 km are widely reported. If caught early, an engine flush and oil change with the correct 0W-20 specification can reduce consumption. In severe cases, piston ring replacement (around €2,000-3,000) or engine replacement may be necessary. Short urban trips and extended oil change intervals significantly worsen this issue. Regular oil level checks between services are essential. The Stellantis extended warranty covers this issue if the maintenance schedule was followed.
Turbo failure
€1,200 - 2,5003 of 5
Turbo bearings wear or wastegate actuator sticks, often linked to oil quality issues · more· less
The turbocharger on the 1.2 PureTech can fail due to oil starvation caused by timing belt debris blocking the oil feed, or from extended use of degraded oil. Wastegate actuator sticking is also reported, particularly on cars driven gently for extended periods, as carbon deposits build up on the wastegate valve. Symptoms include loss of power, excessive smoke, whining noises from the turbo, or an engine warning light with turbo-related fault codes. A full turbo replacement runs €1,200-2,000 at an independent shop, rising to €2,500 at a Citroën dealer. Preventive measures include using the correct oil specification and performing annual oil changes.
Infotainment touchscreen freezing or failure
€400 - 1,0004 of 5
SMEG touchscreen unit freezes, reboots, or goes blank, affecting climate and navigation controls · more· less
The C4 Mk2 facelift uses a 7-inch SMEG touchscreen that controls climate, navigation, and audio functions. Reported issues include random freezes requiring engine restart, continuous rebooting loops, and complete screen failure. A software reset sometimes resolves temporary glitches, but hardware failure requires unit replacement. Repair of an existing unit costs approximately €400-600, while a new replacement unit runs €800-1,000 fitted. Aftermarket alternatives are available for around €500. Since many functions rely on the touchscreen, a malfunctioning unit significantly impacts daily usability.
Electrical system faults (ABS, airbag, climate control)
€200 - 8005 of 5
Various electrical gremlins common on all C4 Mk2 models, including sensor and module failures · more· less
The C4 Mk2 ranks poorly in reliability surveys partly due to recurring electrical issues. Common problems include ABS module failures causing warning lights and uneven braking, airbag warning lights from seat occupancy sensor faults, climate control malfunctions, and central locking intermittent operation. Individual fixes range from €100-300 for sensor replacements to €500-800 for ABS module repairs. While no single electrical fault is catastrophic, the cumulative effect of multiple minor issues can be frustrating and expensive over time. Post-2016 cars show fewer reported electrical issues than 2015 models.
Wet belt demands vigilance, otherwise a practical car
The 1.2 PureTech in the C4 Mk2 carries the same well-known wet timing belt risk as all PSA PureTech turbo engines from this era. With documented service history, annual oil changes using the correct 0W-20 oil, and preventive belt replacement at or before 100,000 km, many owners report trouble-free motoring. The Stellantis extended warranty (10 years / 180,000 km) provides meaningful protection if the conditions are met. Cars used predominantly for short urban trips are at significantly higher risk of belt degradation and oil consumption issues.
Service history
Complete Citroën dealer or specialist records essential. Annual oil changes are critical for the wet belt.
Tires
Check tread depth, age (date codes on sidewall), and uneven wear patterns.
Cold start
Start the engine cold. Listen for unusual rattling or tapping sounds in the first 30 seconds.
Test drive
Drive for at least 20 minutes. Include varied speeds to test gearbox and turbo response.
Specific for this vehicle
Check oil level and condition on dipstick
Oil below minimum or dark/gritty oil indicates poor maintenance. Check for belt debris (fine dark particles) on the dipstick.
Verify timing belt replacement or condition
Ask for documentation of wet belt replacement. If not replaced, check if Stellantis extended warranty (10 years / 180,000 km) still applies. Cars over 100,000 km without belt replacement are high risk.
Test all touchscreen functions
Press every menu option on the SMEG touchscreen. Check for freezing, delayed response, or reboot loops. Climate controls depend on this screen.
+ 3 more checksShow less
Check for warning lights (ABS, airbag, engine)
All warning lights should illuminate briefly at startup then switch off. Persistent lights indicate unresolved faults.
Listen for turbo whistle and check for smoke
Under hard acceleration, listen for excessive turbo whine or rattling. Blue or white smoke from the exhaust indicates oil burning or turbo seal failure.
Verify vacuum pump recall (HFC) completed
Cars built March 2013 to April 2017 with 1.2 PureTech 110/130 hp are affected. Contact Citroën with VIN to confirm recall work done.
Recalls and Technical Service Bulletins
Brake vacuum pump failure from timing belt debris (2013-2017 production, 1.2 PureTech 110/130 hp)Critical - verify completed
Starter motor cable contact with exhaust (2014-2017 production)Verify completed
Front suspension loosening (selected 2015-2018 models)Verify completed
Contact a Citroën dealer with the VIN to verify all recalls have been completed. The vacuum pump recall is particularly important as it affects braking assistance. Note that the recall fix was primarily a software update to detect failures earlier, not a belt replacement.
Warranty Status
Factory warranty (2 years)Expired on all used C4 Mk2 models
Stellantis PureTech extended warranty10 years / 180,000 km for timing belt and oil consumption (conditions apply)
Rust perforation warranty (12 years)May still apply on 2015-2018 models
The Stellantis extended warranty for PureTech engines covers 100% of parts and labor for timing belt degradation and excessive oil consumption, provided the car was serviced according to the manufacturer schedule. Diagnosis and repair must be performed through the authorized dealer network. If you previously paid for these repairs between January 2022 and December 2024, you may claim compensation through the Stellantis online platform.
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.
