What is the Frameless Window & Regulator Issues problem on a 2020 BMW 4 Series (F32/F33/F36)?

Common Problems with the
2020 BMW 4 Series (F32/F33/F36)

We've identified 1 known issue that can affect the 2020 BMW 4 Series (F32/F33/F36). None are considered critical, but they're worth knowing about before you buy.

Known Issues

Serious

Moderate

Minor

The 2020 period has an average number of reported issues compared to other BMW 4 Series (F32/F33/F36) year periods.

All Known Issues

Frameless Window & Regulator Issues

ModerateBodywork & Rust

The windows must drop slightly to clear the trim when opening the door. Faulty regulators or sensors can stop this, leading to trim damage or leaks.

Most affected: Coupe (F32), Convertible (F33), Gran Coupe (F36)

Estimated cost: £150–£350Affects: 2013–2020Often appears around: Age-related

Typical symptoms

•Window refusing to drop when the handle is pulled
•Window "bouncing" back down when trying to close
•Wind noise at speed from poor sealing

What to inspect before you buy

✓Test the window drop on both doors multiple times
✓Check the outer window seals for perishing or tears
✓Inspect the door handle sensors for responsiveness

Buying Tips for the 2020 BMW 4 Series (F32/F33/F36)

✓Check N20 petrol engines (pre-2015 420i/428i) for high-pitched timing chain whine which indicates guide failure
✓Ensure the frameless windows drop slightly when pulling the door handle and seal correctly when closed
✓On Gran Coupe (F36) models, verify the powered tailgate operates smoothly and the seals are intact
✓Check for EGR cooler recalls on all diesel (420d, 430d, 435d) variants, as this is a high-priority safety item

2019 BMW 4 Series (F32/F33/F36)