The Citroen C4 to go for is a manual Mk2 (2010 to 2018) with the 1.6 HDi diesel and receipts for any turbo work, but skip the EGS automated manual, whose clutch can be worn out by 24,000 miles.
6 known faults, 3 rated high severity in our database; owners report 51.2 mpg, 84% of the official figure. Everything below is built from that data and the archived owner history, not from a press car.
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Check a Citroen C4 advert (free) →A manual Mk2, sold from 2010 to 2018, with the 1.6 HDi diesel is the C4 to aim for, because its HDi diesels are a strength. It isn't trouble-free: carbon in the turbo's oil feed is a known fault on 1.6 HDi 16v cars up to 2011, killing turbos anywhere from 30,000 to 100,000 miles, so ask for receipts showing any new turbo came with a new oil feed pipe. Owners have also reported suspect injectors, a DPF additive top-up and clutch and flywheel failures on earlier cars.
A BlueHDi diesel from 2014 on needs more care. It's covered by a High known fault where the AdBlue system fails, between 22,000 and 28,500 miles on owners' cars, and with the pump inside the tank the usual fix is a new tank, pump and injector, so ask for proof of that job. If you're offered a 1.6 THP petrol, that engine has a High known fault for timing chain stretch and tensioner failure on 2009 to 2018 cars, and it's only worth it with receipts for the chain.
The Mk1, sold from 2004 to 2010, has the longer list of trouble on record: flywheel and clutch failures on 2006 1.6 HDi cars and the EGS automated manual wearing out clutches. Should a Mk1 automatic turn out to have the four-speed AL4, that box has a known fault of its own. It's only worth it as a manual with paperwork for the jobs covered below, and be wary of cars rejected by earlier buyers and resold, especially at auction.
There's very little on record about the C4 sold from 2021, which isn't the same as a clean record. Its boot isn't anything special and entry-level cars don't come with an alarm. If one has the 1.5 BlueHDi diesel, its years fall inside both of that engine's High known faults, the AdBlue tank pump and the camshaft chain, so a newer car isn't a reason to skip those checks.
The 1.6 HDi diesel is the lesser risk, as long as any turbo work on it was done properly. On cars up to 2011, carbon clogging the turbo's oil feed is a known fault that's killed turbos anywhere from 30,000 to 100,000 miles, and fitting only a new turbo doesn't cure it: the oil pipe, pump and pick-up need doing too, or the replacement can fail within 10,000 miles. Its cambelt is due at 87,000 miles or 120 months, with a new water pump every time.
The BlueHDi diesels are harder to trust. On the 1.6 BlueHDi from 2014, and the 1.5 if you find one, the AdBlue system can fail well before 30,000 miles, lighting the AdBlue warning and counting down to the engine refusing to restart. Should you come across a 1.5 BlueHDi, its 7mm camshaft chain can stretch and snap between 50,000 and 90,000 miles, and that engine also has a dry cambelt due at 60,000 miles or 60 months.
If you're offered a 1.6 THP petrol, treat it as one to avoid unless there's proof its timing chain and tensioner have been replaced, since both can fail between 40,000 and 80,000 miles and let the timing jump. The 1.2 PureTech runs its cambelt in oil. It's due at 62,000 miles or 72 months and should be checked at every service, a schedule cut from the original 10 years, so ask for receipts.
A manual gearbox is the one to have. The EGS automated manual can wear its clutch out in as little as 24,000 miles, and owners have reported stalling at junctions, clicking back into neutral and refusing to find reverse. If a car has the four-speed AL4 automatic, it can lose pressure between 60,000 and 100,000 miles when its fluid's been neglected, so it shifts harshly or sticks in third. Little's on record about the later EAT6 automatic.
Hear the engine start from cold. A loud metallic rattle on a THP petrol points to the timing chain, and a ticking from the top of a 1.5 BlueHDi is the chain warning too. On any BlueHDi, check the AdBlue light is off and there's no restart countdown on the dash. A Mk1 diesel that drops into limp mode can have sticking throttle butterflies, and one owner's Mk1 needed a new clutch after it turned heavy and gritty in traffic.
Under the bonnet of a 1.6 HDi, look at the rubber fuel return pipes, which can swell and pop off, and make sure the plastic dipstick's still in one piece, because a broken tip ends up in the sump. On the drive, listen for knocks from the front ball joints and rear dampers, and check the power steering doesn't go heavy. Brake discs on the Mk1 wear quickly, so look at the lip on each one.
Try every electrical item. Failed reversing lights can be the first sign of a corroded rear wiring loom, and it's worth checking the cruise control, both sides of the climate control and the tailgate lock on a Mk1 coupe. Look for water inside the rear lights and damp in the passenger footwell. On a Mk2, watch that the radio and sat nav don't keep shutting down and restarting.
Ask for stamped oil changes on any diesel, a receipt for the cambelt at the interval above, and proof of any AdBlue tank or THP timing chain work. Get proof the recalls were done: leaking fuel return pipes and braking recalls on the Mk1, and the fuel rail and starter wire recalls on the Mk2. On an EGS car, ask whether the clutch actuator has been adjusted for wear.
Paste the advert into the free check and it runs these against the listing, the MOT history and the DVLA record before you travel.
Only as a manual with receipts for its weak spots, because the Mk1's got a long list of complaints on record and the EGS automated manual's clutch has lasted as little as 24,000 miles. An automatic with the four-speed AL4 carries a known fault for harsh shifts and limp mode between 60,000 and 100,000 miles. A 1.6 THP petrol from 2009 falls inside that engine's High known fault, timing chain stretch and tensioner failure between 40,000 and 80,000 miles.
The 1.6 HDi diesel has its own list of trouble. Flywheels and clutches failed on 2006 cars and were still going in 2009, and the turbo can starve of oil anywhere from 30,000 to 100,000 miles. One owner paid £468 to top up the DPF additive on a 2007 1.6 HDi at 32,000 miles, and another's 2005 car showed a depollution system warning that a long motorway run didn't clear.
One owner's list of repairs ran to worn front ball joints, new rear dampers, a heater flap motor, an airbag connector under the driver's seat and a cruise control switch pack, while one 2008 car lost its power steering and a front spring at 18,500 miles. One 2006 car had total electrical failure at 83,000 miles. Wiper blades could come off and scratch the screen, and some 2006 cars got clipped blades to stop it.
Recalls covered leaking diesel fuel return pipes on 2004 and 2005 cars, a rear brake pipe check, an airbag computer check, a possible loss of ABS and ESP on 2004 to 2006 cars, and reduced braking performance on 2005 and 2006 cars. Some cars were rejected by earlier buyers as faulty and sold on again, so take extra care over any Mk1 bought at auction.
Real-world economy on this generation: Citroen C4 48.4 mpg.
Yes, a manual Mk2 with the 1.6 HDi diesel is the one to buy, if any replacement turbo came with a new oil feed pipe. A BlueHDi from 2014 on carries a High known fault: its AdBlue system has failed at 22,000 to 28,500 miles, needing a new tank, pump and injector. On a 1.6 THP petrol, the timing chain and tensioner have a High known fault between 40,000 and 80,000 miles; a 1.5 BlueHDi from 2017 adds a camshaft chain that can snap between 50,000 and 90,000 miles.
One owner's 1.6 HDi lost power and shuddered, with the injectors suspected. A 2011 car at 17,000 miles needed a new temperature sensor for the fan, and its owner paid £815 for a new oil electrovalve that had been leaking oil onto the wiring. Another 2012 car flashed an ECO deactivated engine fault message after a battery change that nobody could trace.
The EGS automated manual is still the gearbox to avoid. A 2013 1.6 EGS slipped its clutch at 40,000 miles, though a specialist can reset the clutch actuator's software to allow for the wear rather than fit a new clutch, and a 2012 car sometimes dropped back into neutral and was slow to find second and third. One owner's 1.2 EAT6 had the radio and sat nav rebooting every 3 to 4 minutes.
One recall checked the fuel injector supply rail, which could leak, upset the stop-start and spray petrol under the bonnet. Another repositioned the starter motor's supply terminal so its wire couldn't chafe and short. One 2017 PureTech 130 EAT6 had an engine software update for injection and knock control, and a late 2016 car had a footwell seal checked for water leaks under a service bulletin.
Real-world economy on this generation: Citroen C4 54.0 mpg.
Sellers rarely admit these faults outright
Paste any Citroen C4 advert and we check it against the faults, the MOT record and these figures in seconds.
Check an advert now (free) →Owners report 51.2 mpg across the Citroen C4 engines with data, about 84% of the official figure, from 738 submissions.
Citroen C4 Real MPG by engine →The Mk2 is quiet and comfortable on the move, and its boot's big and easy to use. Build quality took a big step forward from the first C4, and even within the Mk1, one owner found a 2008 2.0 HDi a sturdier car than the 2005 one they'd had before it, calling it a big improvement.
The C4 sold from 2021 rides on cushioned hydraulic suspension that soaks up broken, bumpy surfaces, so rough roads don't spoil the journey. Inside, the cabin's a clear cut above what Citroen had been fitting to its cars before, and it feels like a nicer place to sit than older C4s.
The Citroen C4 to go for is a manual Mk2 (2010 to 2018) with the 1.6 HDi diesel and receipts for any turbo work, but skip the EGS automated manual, whose clutch can be worn out by 24,000 miles. Our database holds 6 known Citroen C4 faults, 3 rated high severity, and the sections above say which generation and engine carry them.
Hear the engine start from cold. Read the MOT history for repeat advisories and ask for invoices for any work the seller mentions. Then paste the advert into the free check, which reads it against every known Citroen C4 fault before you travel.
Owners report 51.2 mpg on average, about 84% of the official figure, from 738 submissions. Wet belt (1.2 PURETECH, 1.2 VTI): 62,000 miles or 6 years, whichever comes first, so budget for it if the history does not show it done. The known faults page lists a rough repair cost against each fault. Citroen C4 Real MPG by engine.
If you used the Honest John car-by-car reviews before the site closed in 2026, this is where the Citroen C4 buying advice now lives. It is written from the archived owner reports and model notes (archived page, 64 items read for this model), our own known-faults database, the confirmed service intervals and the Real MPG figures. Every number on the page comes from that data, not from the text. The same data feeds our free advert check.
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The Citroen C4 is one decision. Reading the advert, the history and the seller are the rest, and these cover them.
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