Toyota Aygo mechanicals at a Citroen price.
The C1 is the French member of the TPCA triplets, built alongside the Toyota Aygo and Peugeot 107/108 in Kolin, Czech Republic. All three share the Toyota 1KR-FE 1.0-litre engine, but the C1 typically sells for 10-15% less than an equivalent Aygo — identical mechanicals at a lower price. Two generations ran from 2005-2022, with Mk2 (2014-2022) examples from £3,500-£7,000 offering the best value.
We track 7 known issues across the Citroen C1 range, with 4 classified as significant. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Citroen C1? Enter the reg to see which of our 7 known issues apply to that exact car, plus full MOT history and mileage checks.
Mk1 (2005–2014) — Petrol options included the 1.0 3-cylinder, with 1.4 HDi on the diesel side.
Mk2 (2014–2023) — Engine options included the 1.0 VTi, 1.2 VTi.
Brake calipers seize due to corrosion of the sliding pin mechanisms and contamination of brake fluid from infrequent changes. MOT data shows this model fails brake binding tests at 13.5x the fleet average, with failures documented across all engine variants and mileage ranges. The problem affects both front and rear calipers but is most common on the rear axle where the smaller brake components are more susceptible to corrosion.
A seized brake caliper causes uneven braking, excessive brake pad wear, and can lead to brake failure. The affected wheel will show accelerated tyre wear and the brake disc may warp from overheating. Repair typically requires caliper replacement or rebuild, new brake pads, and disc skimming or replacement. Total repair cost ranges from £200-500 per affected corner.
Check brake disc condition for lipping or scoring. Test braking at moderate speed for pulling to one side or vibration through the steering wheel. Review MOT advisories for brake-related items.
Suspension bushes and ball joints wear prematurely due to the lightweight construction and small rubber components used throughout the suspension system. MOT data shows failures at 27.6x the fleet average, with the highest failure rate on 1.4L diesel variants. Common failure points include front wishbone bushes, rear beam bushes, and anti-roll bar drop links. The problem is exacerbated by the car's urban use profile where frequent low-speed manoeuvring accelerates bush degradation.
Worn suspension bushes affect handling, tyre wear, and ride comfort. Severely worn components can cause wheel alignment changes leading to rapid tyre wear and potentially dangerous handling characteristics. Typical repair involves replacing multiple bushes and joints, with costs varying significantly depending on which components have failed.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
Lambda sensors, catalytic converters, and air induction systems deteriorate causing MOT emissions failures at rates up to The 1.2L petrol engine shows the highest failure rates, particularly affecting cars with over 100,000 miles. Common causes include carbon build-up in the intake system, failed lambda sensors, and catalytic converter degradation accelerated by oil consumption from the Toyota 1KR-FE engine. Short urban journeys prevent the catalytic converter reaching optimal operating temperature.
Emissions failures prevent MOT pass and legal road use. Catalytic converter replacement typically costs £400-800, lambda sensors £100-200 each, and air induction system cleaning £150-300. Multiple components often fail simultaneously, leading to repair bills exceeding £1000 on higher mileage cars.
Check for any engine warning lights on the dashboard. Ask about the car's MOT emissions history — repeated failures suggest underlying issues. A pre-purchase diagnostic scan is especially worthwhile to check for stored emissions fault codes.
The electric power steering system fails at 0L petrol models, with highest failure rates on cars over 150,000 miles. The EPS motor and control unit are integrated and typically fail together, causing complete loss of power assistance. The system shows warning lights before complete failure but the car remains steerable with increased effort required. This is a known weakness of the early EPS systems fitted to the first generation C1.
Complete EPS failure makes the car very difficult to manoeuvre at low speeds, particularly for parking. The car remains safe to drive but requires significantly more effort to steer. EPS unit replacement typically costs £800-1200 as the motor and ECU are supplied as a single assembly.
During the test drive, check the steering for excessive play, vibration or pulling to one side. Listen for groaning or whining when turning the wheel at low speed. Power steering fluid level and condition should be checked on hydraulic systems.
The clutch cable stretches with use causing the bite point to gradually move closer to the floor. This is a normal wear characteristic of cable-operated clutch systems and can be adjusted during routine servicing. The C1 uses a simple cable and lever arrangement which is easy to maintain but requires periodic adjustment to maintain optimal clutch operation. Complete cable replacement is typically needed by 100,000-120,000 miles.
An over-stretched or poorly adjusted cable makes gear selection difficult and can cause clutch slip or judder. If left unattended, the cable may snap completely, leaving the clutch inoperable. Adjustment costs £30-50, while cable replacement costs £100-200 including labour.
Check each gear engages smoothly without crunching. Feel the clutch bite point — very high or very low can indicate wear. Listen for bearing noise when the clutch is depressed.
For the full breakdown of all 7 tracked issues with repair costs, see the Citroen C1 common problems page.
Based on 891k real DVSA MOT tests, the Citroen C1 fails more often than average on several items. The biggest outlier is mandatory tell-tale for direction indicators or... at 63x the fleet average, followed by hazard warning lamp tell-tale is not a flashing... (62x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Citroen C1 MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 10k miles) typically costs £60–£90 at an independent garage.
See the full Citroen C1 service schedule for every interval and cost breakdown.
The Citroen C1 is a solid choice on the used market, though not without its quirks. The issues we track are well-understood and largely avoidable if you know what to look for. A thorough inspection and complete service history go a long way. 2016-2019 Mk2 with 1.0 VTi (NOT 1.2 PureTech) — avoids PureTech timing chain tensioner issue entirely, proven Toyota engine, mid-life production quality. 2021-2022 for near-new (97% MOT pass rate). Avoid 2005 first-year Mk1 (69% pass rate, worst in range).
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific Citroen C1, we cross-reference the exact variant, engine and age against our database of 7 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 7 known Citroen C1 issues. We are not affiliated with any source listed.