Can I change a headlight bulb myself, or should a garage do it?
It depends entirely on which car you drive, and anyone who gives you a blanket answer is guessing. A garage charges £20-60 to fit a bulb that costs £8-25 a pair. On a Fiesta that's five minutes of your own time. On some French cars the front bumper has to come off to reach the bulb, and if your car has sealed LED headlights there's no bulb at all, just a £100-300 unit swap that's a garage job full stop.
How hard is it really? (It depends on the car)
Spend two minutes on YouTube searching your exact model and "headlight bulb" before you buy anything. That one search tells you which of three camps you're in.
Camp one: easy. You open the bonnet, reach behind the headlight, pull off a rubber dust cover, unclip a wire spring, and swap the bulb. Fiestas, Corsas, most Golfs, plenty of Japanese cars. Five to ten minutes, no tools.
Camp two: fiddly. The bulb's accessible but something's in the way, an air intake, the battery, a washer bottle neck, and you're working blind by feel with a scraped knuckle for company. Doable, annoying, half an hour.
Camp three: forget it. Some Renaults and Peugeots, among others, want the front bumper or the whole headlight unit off to reach a £5 bulb. That's a garage job unless you enjoy trim clips pinging into the hedge.
One rule for every camp: never touch the glass of a halogen bulb with bare fingers. Skin grease creates a hot spot that kills the bulb in weeks. Handle it by the metal base, and if you do touch it, clean it with alcohol before fitting. If yours turns out to be an easy one, a decent pair of branded bulbs is £8-25; check the handbook for your fitting first, H7 and H4 are the common ones but there are dozens.
What a garage charges vs the bulb itself
| Garage, fitted | Bulbs only (pair) | You save |
|---|---|---|
| £20-60 | £8-25 | up to £52 |
The £20 end is a quick reach-in job at an independent. The £60 end is a car where things have to come apart, and honestly, at that point the money's fair. Halfords will fit bulbs bought from them for a small fee too, usually under £15, which suits camp two cars nicely.
When you should NOT DIY this
Three cases. Sealed LED headlights: no serviceable bulb inside, the whole unit gets replaced, £100-300 fitted and sometimes needing coding to the car, so that's garage or dealer territory. Xenon (HID) bulbs: these run off a ballast at very high voltage, enough to give you a serious belt if the system isn't properly powered down, so unless you know what you're doing, don't. And any bumper-off car, where the labour you'd avoid is the whole cost of the job anyway.
Paying a garage without getting stung
£20-60 at an independent is fair, scaled to how buried the bulb is. Where you need your wits: a £150 quote for "a headlight bulb" that's actually a unit replacement can be legitimate on an LED car, so ask them to say which it is in writing. And if a dealer quotes £90 for a five-minute reach-in bulb swap, that's padding, plain and simple. Our guide to garage overcharging covers how to query a bill like that without a row.
Common questions
Should I replace headlight bulbs in pairs?
Ideally, yes. Bulbs dim as they age, and two bulbs fitted together fail close together. If one's gone, its twin is on borrowed time, and a mismatched new-old pair gives uneven light. Since access is the hard part on many cars, doing both while you're in there just makes sense.
Can I be fined for driving with a headlight bulb out?
Yes. Police can issue a fixed penalty of £50-100 for a defective light, though you'll often just get a roadside warning to fix it. A blown headlight bulb is also an MOT fail. Either way it's an £8 part, so it's not worth the gamble of leaving it.
Are brighter aftermarket bulbs legal in the UK?
Brighter halogen bulbs (like +150% ranges) are road legal because they're still standard wattage. What's not legal is fitting LED retrofit bulbs into headlights designed for halogens; they currently fail the MOT. If you want proper LED light, it has to be a headlight designed for it.
Why can't I touch a halogen bulb with my fingers?
The glass runs extremely hot, and oil from your skin creates a hot spot on the surface. That weak point makes the bulb fail early, sometimes within weeks. Handle bulbs by the metal base only, and if you slip, wipe the glass clean with alcohol before you fit it.
How much does it cost to replace a xenon or LED headlight?
Xenon bulbs cost more than halogens (£30-80 each) and the high-voltage system means fitting is best left to a garage. Sealed LED units have no replaceable bulb: the whole headlight is swapped, typically £100-300 fitted at an independent, and considerably more at a main dealer.