Almost two-thirds of drivers are at risk of being left in the dark this winter if they do not have any spare headlight bulbs with them when travelling.
New research has found that almost one in five motorists have waited between one and two weeks before getting it changed.
If a driver waits this long to change a blown bulb, they could receive a huge £100 on-the-spot fine.
In more extreme scenarios, the £100 fine could be raised to £1,000 if it is challenged in court.
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The warning is even more urgent given that the clocks will be changing on Sunday October 29, with days getting shorter.
Experts at eBay are warning that drivers will face significantly darker and more dangerous commutes in the months ahead.
A staggering 64 per cent of motorists said they failed to carry spare headlight bulbs in their car, especially during winter months.
While it is not a legal requirement to carry spare bulbs, it does put them at risk of running into problems when their headlight bulbs fail on the road.
Laura Richards, category lead for vehicle parts and accessories at eBay UK, said the data highlights how drivers need to keep spare headlight bulbs with them.
Drivers could see their visibility seriously reduced if they only have one headlight working, especially in rural areas and as the days get shorter.
She continued, saying: “Last year, we experienced spikes in demand for replacement bulbs in November and January.
“We recommend motorists carry a set of spare bulbs in the glove box, so they’re not caught out and, with eBay’s MyGarage registration look-up technology, finding the right bulbs for your car couldn’t be simpler.”
This comes as experts are warning drivers to book their MOT test as soon as possible, with “Nutty November” around the corner.
The AA warned that millions could be scrambling to get any free MOT tests before the end of the year, with November forecast to be the busiest month.
Almost a quarter of drivers admitted to not carrying out any checks on their vehicle before they take it for an MOT test.
Only 36 per cent said they would regularly check the basics like tyres and lights prior to a car check-up.
Motorists are advised to buy spare headlight bulbs by entering their vehicle information to find the parts that work with their car.
When using the MyGarage service, drivers are protected by the Assured Fit promise, with motorists being sure that the part will fit their car.
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Motorists are warned about driving at night if they have issues with their headlights
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In the event that the bulb is not compatible with the car, they can return it for free within 30 days for a full refund.