Fault File
All models / All cars / Small SUVs / Kia Niro

Kia Niro

All generations and engines together · 80,746 MOT tests in the 2025 data · typical mileage at age 7: 82k

First-time failure at age 7
15.4%
Across 5,395 tests. The average across all tracked models is 19.5%.
Rank at age 7
66 of 239
1 = lowest failure rate among the models tracked.
Typical mileage at age 7
82k miles
Check the mileage view below; low-mileage models can look better by age than they are.

Generation

Split by first-registration year. Cars registered in a changeover year can belong to either generation.

How this model wears

Kia NiroClass average, all tracked models

Known issues

Measured

Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.

What testers flag

Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.

Faults with the car itself

The rows that judge the model rather than its keeper. 17,549 tests in this band.

A suspension pin, bush or joint excessively worn
Advisory
2.1%class 5.9%
Significant brake effort recorded with no brake applied indicating a binding brake
Advisory
1.3%class 0.7%
Service brake efficiency below minimum requirement
Fail
0.8%class 0.1%
Parking brake efficiency below minimum requirement
Fail
0.7%class 0.3%
A suspension joint dust cover severely deteriorated
Minor
0.6%class 1.0%
A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED
Fail
0.6%class 0.8%
Engine MIL illuminated indicating a malfunction
Fail
0.6%class 0.5%

Wear, upkeep and luck

Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.

Tyre tread depth not in accordance with the requirements
Advisory
24.7%class 22.9%
A tyre seriously damaged
Advisory
17.8%class 13.4%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
10.4%class 10.1%
A brake lining or pad worn below 1.5mm
Advisory
3.3%class 8.7%
A tyre seriously damaged
Fail
2.9%class 1.8%
Child Seat fitted not allowing full inspection of adult belt
Advisory
2.8%class 2.2%
Tyre tread depth not in accordance with the requirements
Fail
2.1%class 2.2%
Wiper blade missing or obviously not clearing the windscreen
Fail
1.8%class 1.7%

Unconfirmed issues

Reported

Owner folklore from forums and the motoring press. Most of it never shows up in an MOT, which is why this section exists at all.

Hybrid system "goes to sleep" and refuses to move

Emerging

Owners and Auto Express's own long-term test car have reported the hybrid system randomly refusing to engage drive or reverse, with a warning message that clears itself after a restart. On the magazine's test car it happened around 8,700 miles; the attending RAC technician said it was a known issue on this generation and pointed to a dealer software patch, though no official Kia bulletin has surfaced. It is intermittent and hard to reproduce on a test drive, which is exactly what makes it a bad one to find on your own driveway.

Reported from under 10k miles · sources: Auto Express long-term test, owner reports

Rare timing chain tensioner oil starvation

Disputed

One early hybrid needed a full short-engine replacement under warranty after the timing chain tensioner was starved of oil, with Kia telling the owner it was the only third case they knew of worldwide. It is rare enough that most owners will never see it, and it is disputed whether it counts as a real pattern or a one-off, but it is worth knowing the fix was a full engine swap, not a cheap part.

Reported on a 2017 car at second service · source: Honest John owner report

Early hybrids running rough for no clear reason

Emerging

An early Niro hybrid owner reported the engine running roughly at random intervals, taking four dealer visits before Kia acknowledged it and fitted a new cylinder head and injectors. It reads as a one-off on paper, but combined with the timing chain and hybrid-system software reports above it points to first-model-year niggles on the 1.6 GDI hybrid powertrain that took Kia a while to iron out.

Reported on an early hybrid model · source: Honest John owner report

PHEV heater eats into electric range

PHEV only

On the plug-in hybrid, switching the cabin heater on in winter fires up the petrol engine to provide heat, which can cut the claimed electric-only range roughly in half. It is not a fault as such, just a design trait that catches buyers who bought the PHEV specifically to do short trips on electric power alone.

Applies to PHEV only, all model years · source: Honest John

Electrical relay overheating recall

Confirmed pattern

Kia recalled 5,020 hybrid and plug-in hybrid Niros in the UK over an electrical relay that could overheat. It is an official manufacturer recall rather than forum folklore, so check the car's recall status on the government checker or with a dealer using the VIN before buying, since not every affected car will have had the work done.

Official UK recall, hybrid and PHEV Niro · source: Auto Express

EV faults reported above average in year one

Emerging

Owner satisfaction data on the Niro EV shows roughly a quarter of owners reporting some fault within the first year, above the average for the survey, even though the model still scores well overall and Kia's seven-year warranty covers most of it. It is not tied to one specific part, more a sign the EV drivetrain and its software have had more teething problems than the petrol-hybrid versions.

Around 25% of EV owners reporting a fault in year one, above survey average · source: DrivingElectric

Viewing one? Ask this

Built from the two sections above.

Start the car and try reverse then drive a few times in a row, including after it has sat for a while. Hesitation, a refusal to engage, or a dash warning that clears itself points at the hybrid system software fault.
Ask if any dealer software updates have been applied, and check the service book for them. No record of updates on an older hybrid means the known software gremlins may still be live.
Check the car's recall status using the registration number before agreeing a price. An outstanding electrical relay recall should be fixed free at a dealer before you hand over money.
Cold start the engine and listen for rattling from the timing chain area for the first few seconds. Persistent rattle beyond a couple of seconds is worth an inspection, even though the chain tensioner fault is rare.
On a PHEV, ask the seller to demonstrate electric-only range with the heater on. A big drop from the claimed figure is normal, not a fault, but it matters if you're buying for short electric commutes.
Read the full MOT and service history, not just the current pass. Repeated visits for the same fault, or gaps around the recall period, suggest issues were patched rather than properly fixed.
If it's an EV, ask directly about any faults reported in year one and get any warranty repair paperwork. First-year fault rates on the Niro EV have run above the class average, so a car with no paperwork at all is unusual, not reassuring.

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