Citroën C4 X
Highest output of the PureTech three-cylinder with 155 hp and 240 Nm. Direct injection and turbocharging. Wet belt issues of older production years resolved through revised Gen3 design from 2022.
Sporty fastback saloon
155 hp PureTech in the C4 X — the perfect balance of comfort and dynamics in the elegant fastback body.
Engine Weaknesses 6
The oil-bathed timing belt can delaminate in older production years (pre-2022) due to fuel contamination in the oil. From 2022, revised Gen3 engines were introduced.
Symptoms: Oil pressure warning lamp, engine noise, power loss, potential engine damage.
The high-output EB2-ADTX 155 hp shares the known crankshaft end-float issue of all EB2 engines, but is more severely affected due to the higher stress level. At 0.5 mm of play, PSA requires the engine block to be replaced.
Symptoms: Axial knock on load changes, increasing engine noise, timing belt runs at an angle, oil pressure warning from belt debris
The turbocharger on the EB2-ADTX 155 hp is under greater load than in base variants due to the higher power output. The wastegate and bearings wear sooner, particularly when oil dilution is present.
Symptoms: Whistling or rattling under boost, power loss under full load, black smoke under heavy load, boost pressure fault code
Like all EB2-DT variants, the EB2-ADTX 155 suffers from fuel entering the engine oil during short-trip operation. The diluted oil damages both the timing belt and the turbocharger.
Symptoms: Petrol smell when removing the oil filler cap, oil level above maximum mark, oil thin and dark, increased fuel consumption
Turbocharged EB2 engines produced between March 2013 and April 2017 had defective vacuum pumps. The EB2-ADTX 155 is also affected. A failure noticeably weakens brake servo assistance.
Symptoms: Hard brake pedal, extended stopping distance, brake system warning, in the worst case significantly increased braking effort
The three-cylinder direct-injection engine is prone to fuel entry into the engine oil on short trips. Annual oil changes independent of the service interval are recommended.
Symptoms: Increasing oil level fluctuations, fuel smell in oil.
Vehicle Weaknesses 4
Like other C4 models, C4 X owners report rapidly wearing brake discs. The braking system is a known weak point across this generation of Citroën/PSA compact cars.
The MY-Citroën infotainment system on the C4 X shows occasional crashes and faulty Bluetooth/smartphone connections. Remote functions of the Citroën app only work with limited reliability.
Defects in electrically folding door mirrors are reported on the C4 X. Corroded contacts or failed mirror motors prevent folding — a typical problem on Citroën models of this platform.
C4 X owners report that the air conditioning does not cool sufficiently in high outside temperatures. The A/C is a known problem area on PSA compact models; compressor and refrigerant leak are the causes.
