Toyota Aygo Common Faults: What to Check on an Aygo, C1 or 107 (2005-2014)

If you’re shopping for a cheap first car, you’ve almost certainly bumped into the Toyota Aygo, Citroën C1 and Peugeot 107. They’re everywhere, they’re tiny, and they’re cheap to run. Fewer buyers realise they’re the same car underneath — which means the faults are shared too.

Here’s what actually goes wrong, what it costs, and how to tell a bargain from somebody else’s problem.

One car, three badges

From 2005 to 2014, all three rolled off the same line at the TPCA factory in Kolín, Czech Republic: same 1.0-litre three-cylinder petrol engine (Toyota’s 1KR-FE), same five-speed manual, same body. Differences come down to trim, badges, lights and a bit of suspension tuning. So when someone searches for ‘Toyota Aygo common faults’, they’re really reading about all three cars.

The engine makes 68bhp and will happily return 50mpg. Just note that the first generation is a four-seater, not a five.

Engine faults on the 1.0 VVT-i

The 1KR-FE has a strong reputation, but it has known weak spots.

Water pump leaks

This is the most commonly reported engine issue. The pump bearing wears, starts rumbling, then seeps coolant. Watch for:

• A dry, grinding rumble at idle
• Pink or orange crusty residue around the pump and thermostat housing
• Coolant level slowly dropping with no puddle underneath
• The temperature gauge creeping up in traffic

Budget £150–£300 fitted, and consider doing it alongside the timing chain if the car is near 100,000 miles.

Timing chain noise

It’s chain-driven, so there’s no cambelt interval — good news. Chains and tensioners do eventually wear, though. Listen for a rattle on cold start that fades after a few seconds. A chain kit is £400–£600 fitted. Rare on these engines, but expensive if ignored.

Oil leaks and overheating

Rocker cover and timing cover gaskets can weep with age. More seriously, these alloy engines don’t forgive overheating. Check the coolant, look for mayo under the oil filler cap (short town journeys can cause a little condensation anyway), and make sure the heater blows hot. A car with a head gasket repair in its history is one to leave alone.

Clutch and gearbox wear

The clutch

On a city car that’s spent its life in traffic, the clutch is a wear item, and 60,000–80,000 miles is a typical lifespan. On a test drive, check for:

• A high, vague bite point
• Juddering when pulling away
• Slip in third or fourth going uphill
• A whine when you press the pedal (release bearing)

A replacement is £300–£500 — not a deal-breaker, but a solid negotiating point.

The five-speed manual

Generally tough, but listen for whine in third and fourth (worn bearings) and crunching into second (worn synchros). Both suggest abuse.

The MMT automatic

Some cars came with Toyota’s MultiMode Transmission — an automated manual, not a true automatic. It’s jerky, hesitant, and the clutch actuator is costly to replace. A faulty MMT on a £2,000 car is usually a walk-away.

Rust — where these cars really fall down

Rust, not mileage, is what kills Aygos, C1s and 107s.

Rear axle beam corrosion

The big one. The rear beam axle corrodes from the inside out, especially around the trailing arms and spring seats. Get on your hands and knees with a torch and give it a proper poke — not a polite tap. If metal flakes off in layers, walk away. It’s an MOT failure and a genuine safety issue, and a replacement beam is £300–£600 used plus labour, often more than the car is worth.

Sills, arches and crossmember

Check the sills, rear wheel arches, front crossmember and brake pipes. These cars rust from the bottom up, and a 2007 example that’s never been undersealed will show it.

Exhaust corrosion

Rear boxes and flanges rot through. A new rear box fitted is £80–£150, so it’s haggling material rather than a deal-breaker.

Boot leaks and water ingress

Pull the boot carpet and the spare wheel out and feel for damp. Water gets in through tired rear light gaskets and boot seals, and on early cars through blocked scuttle drains. Seals cost £20–£40, but standing water means a damp, smelly cabin and a rusting boot floor — check what damage has already been done.

Quick pre-purchase checklist

• Coolant level, condition, and any crust around the water pump
• Cold-start rattle from the timing chain
• Clutch bite point, judder or slip
• Gearbox whine or crunching
• Rear axle beam — poke it properly
• Sills, arches, crossmember and brake pipes
• Boot floor and spare wheel well for damp
• Exhaust condition
• Electric windows, central locking and rear light clusters
• A free MOT history check online — look for repeat corrosion advisories

Running costs

Road tax is cheap, with most of these sitting in the lowest bands at roughly £20–£35 a year. Insurance for new drivers is famously reasonable, fuel returns of 50mpg-plus are normal, and parts are plentiful. That combination is exactly why they’re such popular first cars.

Deal-breakers versus haggling points

Walk away from: a rotten rear axle beam, structural sill or floor corrosion, a history of overheating or head gasket work, a faulty MMT gearbox, or a high-mileage car with no service history.

Negotiate on: a worn clutch, a tired exhaust, leaking boot seals, worn drop links and minor cosmetic rust.

The takeaway

A well-cared-for Aygo, C1 or 107 is one of the cheapest and most sensible first cars in Britain. Buy on condition rather than mileage, and be ruthless about rust. Saving £500 on a rusty car will cost you more than that within a year.

When you’re ready to make the change, UpCars.uk is a good place to look — the cars there are checked over properly before they’re listed, which takes a lot of the guesswork out of buying one of these little city cars.