Common problems

MG GS common problems

What MOT testers find on the MG GS: the parts that fail or get advisories most often at each age, against all cars of the same age. From 10,561 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

At 6 years, the most tested age

Lights and electrics fails per 100 MOTs (n=2,862)9.5

All cars at 6 years (n=10,382,720)4.7

Tyres advisories and minor defects per 100 MOTs (n=2,862)27.7

All cars, same age (n=10,382,720)24.3

What stands out

Lights and electrics fails show up on 9.5 of every 100 MOTs of a MG GS at 6 years old (n=2,862), against 4.7 for all cars of that age (n=10,382,720).
Suspension fails are less common: 1.1 per 100 MOTs against 2.9 for all cars at the same age.
The fail item testers record most often at 6 years: headlamp aim: too low, on 4.8 per 100 MOTs (all cars 0.8).
The most common advisory or minor defect: tyre condition: slightly damaged/cracking or perishing, on 16.9 per 100 MOTs.

Problems by part at 6 years

How many of every 100 MOTs found a fail, or an advisory or minor defect, in each area. A test with faults in two areas counts in both.

MG GS at 6 years (n=2,862) against all cars at 6 years (n=10,382,720). Per 100 MOTs.
Area	Fails	All cars	Advisories	All cars
Lights and electrics	9.5	4.7	2.9	1.9
Brakes	7.2	3.5	22.2	16.9
Tyres	6.7	5.6	27.7	24.3
Exhaust, emissions and leaks	2.6	1.3	1.3	1.2
Seat belts and airbags	2.1	0.4	0.3	0.2
Windscreen, wipers and mirrors	1.9	3.3	3.1	3.1
Body and structure	1.3	0.8	1.6	1.2
Suspension	1.1	2.9	4.6	6.1
Number plates and VIN	0.3	0.2	0.8	1.0
Steering	0.1	0.5	0.5	0.8
Road wheels	0.1	0.2	0.1	0.6

What testers fail most on the GS at 6 years

Fail items on the MG GS at 6 years (n=2,862), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	Typical repair (estimate)
Headlamp aim: too low	Lights and electrics	4.8	0.8	£16 to £39 per car (rough guide)
Brake pads under 1.5 mm	Brakes	2.8	1.9	£72 to £174 per axle (rough guide)
Anti-lock braking system: warning lamp indicates an ABS fault	Brakes	2.8	0.1	diagnosis from £59 (rough guide)
Tyre pressure monitoring system: malfunctioning or obviously inoperative	Tyres	2.7	0.5	£53 to £125 per wheel (rough guide)
Tyre tread below 1.6 mm	Tyres	2.4	2.0	£88 to £145 per tyre
Electronic stability control: warning lamp indicates a fault	Brakes	1.9	0.1
Airbag (SRS) warning light on	Seat belts and airbags	1.8	0.2	diagnosis from £39 (rough guide)
Headlight aimed too high	Lights and electrics	1.4	0.6	£16 to £39 per car (rough guide)
Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits	Exhaust, emissions and leaks	1.2	0.1
Wipers not clearing screen	Windscreen, wipers and mirrors	1.0	1.8	£15 to £30 per blade

Early warnings: advisories and minor defects at 6 years

Advisories and minor defects are recorded, but the car still passes. Across all cars, a part with an advisory or minor defect failed at the next MOT 5.5 times in 100 (n=88,666,940 pairs of consecutive MOTs), against 0.3 times in 100 when the same part had none (n=12,936,860,350).

Advisories and minor defects on the MG GS at 6 years (n=2,862), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	If it needs replacing (estimate)
Tyre condition: slightly damaged/cracking or perishing	Tyres	16.9	9.2	£88 to £145 per tyre
Brake discs: worn, pitted or scored, but not seriously weakened	Brakes	16.0	7.3	£148 to £376 per axle (rough guide)
Tread depth: worn close to legal limit/worn on edge	Tyres	11.9	14.3	£88 to £145 per tyre
Brake pads: wearing thin	Brakes	7.7	9.3	£72 to £174 per axle (rough guide)
Child Seat fitted not allowing full inspection of adult belt	Other	3.7	2.4
Nail in tyre	Other	3.4	2.0
Coil spring: corroded	Suspension	2.6	0.3
Windscreen: damaged but not adversely affecting driver's view	Windscreen, wipers and mirrors	1.7	1.8
Brake discs: worn, but not excessively	Brakes	1.5	2.5	£148 to £376 per axle (rough guide)
Tread depth: worn close to legal limit/worn on edge	Tyres	1.4	2.0	£88 to £145 per tyre

Repair estimates are a guide for an independent garage: labour at the national median local garage rate (median £78 an hour from 65 garages, ONS price quotes) times estimated labour hours, plus a parts band. Labour hours and most parts bands are estimates, not quotes, and prices vary by model, engine and region. A warning light fault shows the cost of the diagnosis only.

How problems change with age

Fails per 100 MOTs in the three most common areas at 6 years. Ages with fewer than 1,000 tests are not shown.
Age	Tests (n)	Lights and electrics	Brakes	Tyres
4 years	1,341	6.5	3.7	3.4
5 years	2,322	8.7	6.1	6.6
6 years	2,862	9.5	7.2	6.7
7 years	2,504	10.5	7.9	7.4
8 years	1,532	12.7	7.2	7.4

What to check on a viewing

On the MG GS, testers most often record headlamp aim: too low; brake pads under 1.5 mm; anti-lock braking system: warning lamp indicates an ABS fault. Look at these first, then the areas below.

Lights and electrics

With someone outside, try every light: dipped and main beam, indicators, brake lights, fog lights and number plate lamps.
Check that the warning lights come on with the ignition and go out once the engine runs.
Look for misted, cracked or yellowed headlamp lenses.

Brakes

On the test drive the car should stop in a straight line without pulling, juddering or grinding.
Look at the discs through the wheels for a deep lip, heavy rust or scoring.
Check that the handbrake or electronic parking brake holds the car on a slope.
Ask when the pads, discs and brake fluid were last changed, and for the receipts.

Tyres

Check the tread across the full width of all four tyres, and the spare if there is one.
Look for cuts, bulges and cracking in the sidewalls.
Wear on one edge only can point to worn suspension or the tracking being out.

Ask for the car's MOT history and service record: advisories that repeat from one year to the next show what has been left. GOV.UK MOT history.

Questions

What are the most common problems on the MG GS?

At 6 years, the age with the most MOT tests (2,862), the fail items testers record most often on the MG GS are headlamp aim: too low (4.8 per 100 MOTs), brake pads under 1.5 mm (2.8 per 100 MOTs), anti-lock braking system: warning lamp indicates an ABS fault (2.8 per 100 MOTs). The most common advisories or minor defects are tyre condition: slightly damaged/cracking or perishing (16.9) and brake discs: worn, pitted or scored, but not seriously weakened (16.0).

Which parts of the MG GS fail more often than on other cars?

At 6 years: lights and electrics (9.5 per 100 MOTs against 4.7 for all cars); brakes (7.2 per 100 MOTs against 3.5 for all cars); seat belts and airbags (2.1 per 100 MOTs against 0.4 for all cars). Compared with 10,382,720 MOTs of all cars the same age.

MG GS problems by area

Other MG models

All MG models · Common problems by make

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

The all cars figures cover all class 4 vehicles (cars and light vans) tested at the same age.

Looking at a MG GS?

These figures describe the model, not the car in front of you. Found one you might buy? See what the VetTheCar Buying Report covers, or use the tools that work without a registration.

See a sample report Car tools · MOT fail rates by model · Compare models by MOT record

Repair estimates: ONS consumer price quotes for local garage labour (09/2025 to 08/2026), the MOT inspection manual for defect wording, and estimated labour hours and parts bands. Not affiliated with or endorsed by ONS.

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources