Go for a Citroen C4 Cactus 1.2 PureTech or 1.6 BlueHDi with a manual gearbox and proof the wet belt or AdBlue system has been seen to, and avoid the 1.5 BlueHDi, which carries two serious known faults.
4 known faults, 3 rated high severity in our database. 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 Cactus advert (free) →The safer C4 Cactus is a 1.2 PureTech petrol or 1.6 BlueHDi diesel with a manual gearbox and receipts proving its weak spot has been dealt with. There's only one generation, sold from 2014 to 2021, and each of those engines carries a serious known fault, so you're picking the risk you can check for rather than hunting for a car without one.
Steer clear of the 1.5 BlueHDi diesel that arrived in 2017. It shares the older diesel's AdBlue failure and adds a 7mm timing chain that's known to stretch and snap between 50,000 and 90,000 miles, wrecking the top of the engine. Two serious faults in one engine make these later diesels the riskiest Cactus to buy, however tidy the car looks.
On the e-HDi 92 and BlueHDi 100 diesels, don't pick the ETG6 automated gearbox. It's a manual with a computer working the clutch, it's known to wear that clutch out early and to stall or drop into neutral at junctions. The ordinary manual sidesteps that, though it isn't trouble-free either: check the clutch on any car you drive.
The 1.2 PureTech petrol is a fair choice only if its wet timing belt has been looked after. The belt runs in oil, and as it breaks up it can block the oil pickup, starving the engine and taking out the brake vacuum pump. The replacement interval's now 62,000 miles or 6 years, with the belt checked at every service, so ask for evidence of both.
The 1.6 BlueHDi diesel, sold from 2014, has a known AdBlue failure that shows up between 22,000 and 28,500 miles. The pump's built into the AdBlue tank, so the usual fix is a new tank, pump and injector. A dealer quoted one 2015 owner £2,500 for it, and Citroen offered to pay part of the bill. A car with receipts for that job is the better bet.
The 1.5 BlueHDi from 2017 gets the same AdBlue trouble plus the timing chain that fails between 50,000 and 90,000 miles, so leave it. The ETG6 automated box on the e-HDi 92 and BlueHDi 100 has needed a new clutch by 24,000 miles, and owners have had it stall pulling out, slip into neutral or refuse a gear. The manual's change feels a little vague, but it doesn't share those problems.
On a PureTech, the belt paperwork matters more than anything else: a belt check stamped at each service and, past 62,000 miles or 6 years, a receipt for the new belt. On the drive, watch for the low oil pressure light or the engine management light, and press the brake pedal with the engine running. A hard pedal means the servo's lost its assistance, a sign the vacuum pump has failed.
On any BlueHDi, look for an AdBlue warning light or a countdown saying the engine won't restart after a set number of miles, and ask for receipts if the tank's been replaced. On a 1.5, listen for ticking or rattling from the top of the engine. On any automated gearbox, check it pulls away cleanly; one owner's 2016 PureTech 82 automatic hesitated from a standstill and later rattled loudly on restarting.
One owner's clutch release arm, a plastic part, snapped and left the clutch unable to disengage, so make sure the pedal frees the drive cleanly. Others had a 2015 car whose steering wheel drifted left below 30mph, a 2017 car whose handbrake cable had stretched until it took 11 clicks instead of 4, and a touchscreen that kept showing a multimedia error, dropping Bluetooth and the fan control. Try all three.
Ask for proof of recall work. A 2016 recall checked the fuel injector rail for petrol leaks that could start a fire, and 2017 recalls covered a starter motor relay that could overheat, a bonnet catch cable that needed extra support so the bonnet couldn't pop open, and front bumper trim whose bonding wasn't up to standard, letting it work loose.
Paste the advert into the free check and it runs these against the listing, the MOT history and the DVLA record before you travel.
Yes, a 2014 to 2020 C4 Cactus is worth having as a manual 1.2 PureTech or 1.6 BlueHDi, as long as the paperwork covers the wet belt checks or the AdBlue repair, because both engines carry a serious known fault. Cars from 2017 onwards can have the 1.5 BlueHDi instead, so check what's under the bonnet before you get attached to a late one.
It's a quirky car to live with, and a few design choices catch buyers out. The rear seat folds as one piece rather than splitting, the back windows only pop out instead of winding down, and the optional glass roof has no blind, though it's insulated against heat. The front bench seat only came on ETG6 automatic cars, and that's the gearbox to avoid.
The diesel faults turn up at fairly predictable points: AdBlue trouble between 22,000 and 28,500 miles, an ETG6 clutch worn out by 24,000 miles and, on the 1.5, a chain that lets go between 50,000 and 90,000 miles. A low-mileage diesel hasn't proved anything yet, so one that's past those points with receipts for the work is the safer car.
A few one-off reports are worth testing for. One owner's 2017 PureTech 110 wouldn't reverse up a slope without lots of revs, and there's no rev counter to judge by, so try a hill start in reverse. Another's year-old PureTech showed a permanent SERVICE warning after an air-con software update, and one 2017 car needed its air-con regassed at the first service.
Sellers rarely admit these faults outright
Paste any Citroen C4 Cactus advert and we check it against the faults, the MOT record and these figures in seconds.
Check an advert now (free) →It's a comfortable, quiet car to cover miles in, with forgiving suspension that takes the sting out of broken roads. There's proper room in the front and the back, so adults in the rear don't feel squashed on a longer trip, and nobody's fighting for elbow space up front either.
Inside, it doesn't feel like a basic family hatchback. The cabin's finished to a high standard, and the design takes its cues from posh luggage, which gives it a look that's all its own. The 1.2 PureTech petrol pulls strongly and runs smoothly for an engine with only three cylinders.
Go for a Citroen C4 Cactus 1.2 PureTech or 1.6 BlueHDi with a manual gearbox and proof the wet belt or AdBlue system has been seen to, and avoid the 1.5 BlueHDi, which carries two serious known faults. Our database holds 4 known Citroen C4 Cactus faults, 3 rated high severity, and the sections above say which generation and engine carry them.
On a PureTech, the belt paperwork matters more than anything else: a belt check stamped at each service and, past 62,000 miles or 6 years, a receipt for the new belt. 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 Cactus fault before you travel.
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.
If you used the Honest John car-by-car reviews before the site closed in 2026, this is where the Citroen C4 Cactus buying advice now lives. It is written from the archived owner reports and model notes (archived page, 25 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 Cactus is one decision. Reading the advert, the history and the seller are the rest, and these cover them.
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