A missing side window can allow exhaust gases from your own or other vehicles to enter the cabin. If a police officer believes carbon monoxide poisoning risk exists, they can prohibit the vehicle under Section 59 of the Road Traffic Act 1988.
| Condition | Illegal? | |-----------|-----------| | Small crack in passenger side window | No | | Missing rear passenger side window (no sharp edges) | No | | Missing driver’s side window, dry day, clear view to mirror | Technically no, but risky | | Missing driver’s side window in rain/fog (vision impaired) | Yes | | Any window with sharp glass edges | Yes | | Any broken window that allows exhaust fumes in | Yes | | Driving to a repair shop after accidental breakage | No (reasonable excuse) | is it illegal to drive with a broken side window uk
Regulation 30(3) states that all glass or transparent material must be maintained so it does not obscure the driver's vision. A missing side window can allow exhaust gases