Tiny Italian city car, giant character
The Fiat Seicento (1998-2004) was one of the cheapest new cars on sale in the UK, a tiny city car successor to the Cinquecento. On the used market it is now almost disposably cheap, with good Sportings fetching under £2,000. It appeals to budget buyers, new drivers wanting minimal insurance costs, and enthusiasts who appreciate its cheeky Italian character and go-kart handling.
We track 5 known issues across the Fiat Seicento range, including 2 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Fiat Seicento? Enter the reg to see which of our 5 known issues apply to that exact car, plus full MOT history and mileage checks.
178 (1998–2010) — Engine options included the 0.9 FIRE, 1.1 FIRE. Our database flags 5 known issues on this generation, 2 of which are rated as safety-critical. The most significant concern is Subframe mounting point corrosion (£400–£800 to address).
The steel mounting points where the front subframe attaches to the body shell are prone to severe corrosion on the Seicento, particularly around the rear subframe mounting bushes. The thin steel construction and poor factory rust protection mean these critical structural areas corrode through completely, compromising the attachment of suspension components and steering rack. This is a well-documented failure mode that has led to MOT failures at 61.9 times the national fleet average. Once the mounting point structure is compromised, welded repair is often uneconomical relative to the car's value.
Complete structural failure makes the car immediately dangerous to drive as suspension geometry becomes unpredictable and steering components can detach. Professional welded repair typically costs more than the car's value. The vehicle should not be driven once mounting point integrity is compromised.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
The Seicento suffers from multiple brake system defects that cause it to fail MOT brake efficiency tests at up to 172.8 times the national fleet average. The most common causes are seized brake calipers, corroded brake lines, and uneven pad wear leading to brake imbalance across axles. The small brake components and thin brake lines are particularly susceptible to corrosion in UK conditions. This creates a genuine safety hazard as braking distances become unpredictable and the car may pull severely under braking.
Brake system failure creates immediate danger to occupants and other road users. Complete brake failure is possible if corroded lines rupture or calipers seize completely. Repair costs vary widely depending on extent of corrosion but often exceed £500 for comprehensive brake system overhaul.
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.
Front suspension components on the Seicento corrode and fail at 69.4 times the national fleet average. The most commonly affected parts are lower wishbone arms, anti-roll bar links, and track rod ends, all of which use thin steel construction with inadequate rust protection. Corrosion typically begins at ball joint boots and spreads to the main component structure. Failed components cause excessive play in the front suspension, affecting steering precision and potentially leading to complete separation of steering or suspension components.
Failed suspension components compromise vehicle handling and can lead to loss of steering control. Complete component separation is possible in severe cases. Replacement of multiple corroded components typically costs £300-600 depending on extent of damage.
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.
Shock absorbers fail on the Seicento at 51.2 times the national fleet average, typically through seal failure leading to oil leakage. The front MacPherson strut units are particularly prone to seal degradation, while rear shock absorbers often fail due to corrosion of the main body tube. Failed shock absorbers severely compromise ride quality and vehicle stability, particularly during cornering and emergency braking situations.
Failed shock absorbers reduce vehicle stability and increase stopping distances, particularly in emergency situations. Severe leakage can contaminate brake components. Complete shock replacement typically costs £200-400 for a full set including labour.
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.
CV joint boots fail at 28.0 times the national fleet average on the Seicento due to poor quality rubber compounds that deteriorate rapidly in UK weather conditions. Split boots allow water and dirt contamination of the CV joint, leading to accelerated wear and eventual joint failure. This is primarily a maintenance issue but can progress to expensive driveshaft replacement if left unaddressed. The outer CV joints are most commonly affected.
Split boots lead to CV joint contamination and eventual failure requiring complete driveshaft replacement. Early replacement of boots costs £80-150 per side, while full driveshaft replacement costs £200-350 per side. The car remains driveable with split boots but should be repaired promptly.
Listen for clunking or vibration from underneath when pulling away or changing direction. Check for play in the driveshafts by rocking the car in gear with the handbrake on. Worn CV boots are a telltale sign — look for grease splatter around the inner wheel arch.
For the full breakdown of all 5 tracked issues with repair costs, see the Fiat Seicento common problems page.
Based on 12k real DVSA MOT tests, the Fiat Seicento fails more often than average on several items. The biggest outlier is braking effort inadequate at a wheel at 173x the fleet average, followed by anti-roll bar links worn (101x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Fiat Seicento MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 9k miles) typically costs £45–£65 at an independent garage.
The bigger-ticket items to budget for include timing belt and tensioner (£280–£350).
See the full Fiat Seicento service schedule for every interval and cost breakdown.
The Fiat Seicento has some well-documented weak points, including 2 safety-critical issues that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable. Cars from October 2000 onwards all received the superior 1.1-litre Fire engine. The SX-based 'En Suite' special from September 1999 is also a good pick with the 1.1, plus standard power steering and air conditioning. Avoid any car with the Citymatic transmission or the older 899cc engine.
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 Fiat Seicento, we cross-reference the exact variant, engine and age against our database of 5 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 5 known Fiat Seicento issues. We are not affiliated with any source listed.