2020–2021 BMW 3 Series (G20)
Browse our directory of 2020–2021 BMW 3 Series (G20) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
Registration Directory
Common Problems & Reliability
The 2020–2021 BMW 3 Series (G20) has 5 known issues. 2 of these are classified as serious faults that could be expensive to repair. 2 are moderate concerns worth inspecting before purchase.
Starter Motor Fire Risk (Recall)
SeriousA significant UK recall affects cars built between 2020 and 2022 where a faulty starter motor switch can overheat.
Symptoms: Burning smell from the engine bay, Car failing to start...
Est. repair cost: £0 (Recall)
Integrated Braking System (IBS) Recall
SeriousA fault in the hydraulic braking assistance unit can lead to a loss of power assistance, requiring much higher pedal force to stop.
Symptoms: Brake warning light on dash, Significantly increased brake pedal effort required...
Est. repair cost: £0 (Recall)
Coolant Loss (B48 & B47 Engines)
ModerateThe plastic oil filter housing and coolant expansion tanks are known to crack or seep, leading to slow coolant loss that can go unnoticed until a warning appears.
Symptoms: Intermittent low coolant warning, Sweet smell from the engine bay after a drive...
Est. repair cost: £150–£600
Rear Differential Weeping
ModerateEarly G20 models often suffer from a weeping rear differential seal, which can lead to oil loss and eventual diff failure if not addressed.
Symptoms: Oil spots on the driveway under the rear axle, Dark, oily residue on the differential casing
Est. repair cost: £300–£500
Infotainment (iDrive 7) Glitches
MinoriDrive 7 can suffer from random reboots, black screens, or GPS location errors. Most are software-related but some telematics modules fail.
Symptoms: Central screen going blank and restarting, Apple CarPlay/Android Auto dropping out...
Est. repair cost: £0–£300
Buying Tips for the 2020–2021 BMW 3 Series (G20)
- ✓Verify that the starter motor fire risk and IBS (Integrated Braking System) recalls have been completed
- ✓Check for inner shoulder wear on the rear tyres, as the G20 can be sensitive to rear alignment
- ✓Listen for wind noise around the A-pillars at motorway speeds, which may require acoustic glass or seal adjustment
- ✓On 330e PHEV models, verify the charging port door operates smoothly and the electric range is as expected
Check Any Vehicle
Don't see your specific car listed? Enter any UK registration number for an instant vehicle history check — including MOT history, tax status, finance check, and write-off data.
Free Vehicle Check