Used car guide

2017 BMW 430: common problems and what to check

What gets flagged at MOT on 2017 BMW 430s, from 2,321 tests in 2025, plus known faults and what to look at before you buy one.

2,321MOT tests in 2025

85%pass first time (all 2017 cars: 78%)

8,000typical miles a year

5.5×the usual rate for steering rack inner joints

What stands out

Parts flagged at MOT more often on 2017 BMW 430s than on all cars registered in 2017.

Steering rack inner joints5.5× usual

BMW 430
3.3% All 2017 cars
0.6%

Failed outright at MOT: 0%, against 0% of all 2017 cars. The rest were advisories or minor defects.

Rough price £100–£450 our estimate

At the viewing: On a straight road the steering wheel should sit straight. Listen for knocks when turning, and check the steering feels even.

By area

The share of 2017 BMW 430 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

Tyres

28% of testsRough price £70–£150

At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
Brakes

14% of testsRough price £150–£350

At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
Suspension

9% of testsRough price £120–£400

At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
Wipers, windscreen and mirrors

5% of testsRough price £15–£250

At the viewing: Check for chips in the driver's view, and test the wipers and washers.
Steering

3% of testsRough price £100–£450

At the viewing: On a straight road the steering wheel should sit straight. Feel for play or knocking when turning.
Lights and electrics

3% of testsRough price £10–£80

At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

Known faults

Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.

Timing chain wear
2.0 petrol and diesel
The four-cylinder petrol and diesel engines (shared with the 3 Series) can suffer timing chain wear, especially with late oil changes. A failed chain is an engine-out repair.

At the viewing: Listen for a rattle or whine from the back of the engine, especially from cold. Ask for oil changes on time.

Source: Parkers: BMW 3 Series (2012-2019) used review (the 4 Series shares its engines and running gear)
Blocked EGR valve or particulate filter (diesel)
Diesel
Diesels used mostly for short trips can block the EGR valve or clog the particulate filter, causing poor running.

At the viewing: Ask what journeys it’s done and watch for warning lights or a lack of power.
If it needs doing: DPF clean or regeneration, about £160–£500. ClickMechanic

Source: Parkers: BMW 3 Series (2012-2019) used review (the 4 Series shares its engines and running gear)
Noisy differential

A whine from the rear as the car passes you can mean the differential has been neglected.

At the viewing: Ask someone to drive it past you slowly and listen for a whine from the back.

Source: Parkers: BMW 3 Series (2012-2019) used review (the 4 Series shares its engines and running gear)

Looking at a BMW 430?

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Other years

Year	MOT tests	Most flagged
2019	1,372	Tyres 26%
2018	2,256	Tyres 26%
2016	2,721	Tyres 28%
2015	2,546	Tyres 29%
2014	1,057	Tyres 27%

Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2017 BMW 430s registered in 2017. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score