Citroën C4
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.
Strongest PureTech
155 hp PureTech in the C4 III — the strongest petrol in the range. Revs enthusiastically and makes the C4 a lively compact.
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
A recall was issued for the C4 III because rear axle springs can detach and fall off. This presents a significant safety risk for other road users.
Citroën issued a recall for the ë-C4 III because the high-voltage wiring harness presents an elevated fire risk. Affects the electric variant of the C4 III; immediate workshop inspection required.
The infotainment system on the C4 III shows occasional software bugs and dropped connections. Smartphone pairing fails, and the system freezes. Remote functions of the app work unreliably.
Several owners report unexpected suspension noises when going over road irregularities. Over severe potholes the damping can bottom out and transmit unpleasant impacts into the body.
