2020–2023 BMW 4 Series (G22/G23/G26)
Browse our directory of 2020–2023 BMW 4 Series (G22/G23/G26) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 2020–2023 BMW 4 Series (G22/G23/G26) has 3 known issues. 3 are moderate concerns worth inspecting before purchase.
Radar Sensor Misalignment
ModerateThe front radar sensor located in the large kidney grille is vulnerable to even minor "nudges", which can knock it out of alignment and disable the cruise control and safety systems.
Symptoms: "Driver Assistance Restricted" warning on dash, Active Cruise Control refusing to engage...
Est. repair cost: £200–£500
Coolant Loss (B58 Engine)
ModerateThe M440i can suffer from slow coolant loss, often from the expansion tank cap or a minor weep from the water pump or turbo cooling lines.
Symptoms: Low coolant warning on the iDrive, Sweet smell of coolant after a spirited drive...
Est. repair cost: £50–£300
Active Grille Shutter Motor Failure
ModerateThe motorised flaps behind the front grilles can fail to open or close correctly, throwing an engine management light and affecting aerodynamics.
Symptoms: Check Engine Light (EML) with air flap codes, Flaps stuck in one position...
Est. repair cost: £300–£600
Buying Tips for the 2020–2023 BMW 4 Series (G22/G23/G26)
- ✓Check the front grille area carefully for any stone damage or minor impacts, as the radar sensors are very exposed
- ✓On M440i models, monitor the coolant level closely; the B58 engine is generally reliable but can have slow seeps
- ✓Test the convertible roof (G23) and the Gran Coupe (G26) frameless windows for smooth, silent operation
- ✓Verify the latest iDrive 7 or 8 software is installed to avoid known navigation and connectivity bugs
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