Rules are strict and drivers might not appreciate the smaller aspects
A viral Reddit post has ignited debate amongst UK motorists after one driver claimed their vehicle failed its MOT due to a tiny sticker on the windscreen, despite it being concealed behind the rear-view mirror and scarcely noticeable. While the tale may seem astonishing, specialists at rental car firm Indigo Car Hire confirm it’s entirely plausible under UK MOT regulations.
During an MOT inspection, examiners must assess the driver’s visibility through the windscreen. The zone cleared by the wipers is separated into sections, and anything obstructing the driver’s view, including stickers, parking permits, dashcam mounts or phone holders, can trigger a failure if it surpasses certain size restrictions.
In the Reddit account, the motorist stated the examiner failed the vehicle because the sticker sat within the swept zone of the windscreen. After peeling it off whilst in the car park, the examiner re-inspected the car and issued a pass certificate moments later. According to motoring specialists, it’s a regulation many drivers remain unaware of.
Cherie Carter, director at Indigo Car Hire, said: “A lot of motorists assume small stickers or permits on the windscreen don’t matter, especially if they’re tucked behind the mirror or out of the way. MOT testers have to follow very specific visibility rules.
“If anything inside the wiper sweep is considered large enough to obstruct the driver’s view, the tester is obliged to fail the vehicle. It often surprises people because the car can otherwise be perfectly roadworthy.”
The sticker problem is merely one of numerous unexpected reasons vehicles fail their MOT annually. Other surprisingly frequent causes include empty windscreen washer bottles – if there’s insufficient fluid to clean the screen, the vehicle can fail – and dashboard warning lights – illuminated engine, airbag or ABS lights result in automatic failures on modern cars.
Experts suggest many of these problems can be resolved fairly easily, yet still catch motorists out on test day. With over 30 million MOT tests conducted each year across the UK, minor oversights such as these can prove the difference between a pass and a frustrating return trip to the garage.


