If you’ve found a nail in your tyre, don’t pull it out. Check if the tyre is still holding air, drive slowly and carefully to a garage or tyre fitter if it is, and call for roadside assistance if the tyre is flat or losing air fast. Pulling the nail out yourself can turn a slow leak into a sudden blowout.
You’ve just spotted it in the tread, or your TPMS light came on and you found the cause. Either way, the next few minutes matter more than you’d think. What you do right now decides whether this is a £25 repair or a full tyre replacement.
Here’s exactly what to check, what to avoid, and when a nail actually means the tyre is finished.
Step 1: Check If the Tyre Is Still Holding Air
Look at the tyre before you touch anything. If it still looks properly inflated and the car isn’t pulling to one side, the nail may be sealing its own hole for now.
This happens more often than people expect. A nail can act like a plug, especially if it’s still lodged in place. That doesn’t mean it’s safe long-term, but it usually means you have time to get to a garage rather than needing an emergency callout.
Step 2: Do Not Remove the Nail Yourself
This is the most common mistake. Pulling the nail out releases whatever air pressure the nail was holding back, and a slow leak can become a flat within minutes.
Leave it exactly where it is. Even if it looks small, let a professional assess it. Tyre fitters have the tools to remove it safely and check the hole properly before deciding on a repair.
Step 3: Check the Location of the Puncture
Where the nail is matters more than how big it is. A puncture in the central tread area is often repairable, but a puncture in the shoulder or sidewall almost always means the tyre needs replacing.
The sidewall flexes constantly as you drive. A repair there won’t hold under normal driving stress, and most tyre fitters won’t legally repair it for safety reasons.
Step 4: Decide If It’s Safe to Drive
This depends on how the tyre is behaving right now, not on how you feel about it.
If the tyre is fully inflated and the nail is small, drive slowly and directly to the nearest garage. Avoid motorways and high speeds. Check the tyre again once you arrive.
If the tyre is visibly low or the car is pulling to one side, don’t drive on it. Call for roadside assistance or use your spare if you have one and know how to fit it safely.
If the tyre is completely flat, don’t drive on it at all, even for a short distance. Driving on a flat damages the wheel rim and can destroy the tyre beyond repair.
Step 5: Get It Properly Inspected
Even if the tyre seems fine, a nail puncture should always be checked by a professional, since a slow leak isn’t always obvious just from looking at the tyre.
A tyre fitter will remove the nail, inspect the hole from the inside, and tell you whether a plug-and-patch repair is possible or if you need a replacement.
When a Repair Is Possible
Most fitters use the “plug and patch” method for eligible punctures. This involves sealing the hole from both the inside and outside of the tyre. A proper repair typically costs between £15 and £30 and takes under 30 minutes.
For a repair to be approved, the puncture usually needs to be:
- Located in the central tread area, not the shoulder or sidewall
- No larger than 6mm in diameter
- The tyre hasn’t been driven on while flat, which can cause internal damage you can’t see
When You’ll Need a New Tyre Instead
A repair isn’t always possible, and driving on a tyre that shouldn’t be repaired is a real safety risk.
You’ll likely need a replacement if:
- The puncture is in the sidewall or shoulder area
- The tyre was driven on while flat or badly under-inflated, which can damage the internal structure
- There’s more than one puncture, or the tread is already worn close to the legal limit
- The tyre has existing damage, like cracking or bulges, in addition to the puncture
Does a Nail in Your Tyre Count as an MOT Fail?
It can. A puncture that’s currently causing a leak, or repair work that hasn’t been done to standard, can result in an MOT failure under tyre condition rules. If you’re due an MOT soon, get the puncture checked and repaired beforehand rather than risking it.
What About a Nail That Doesn’t Seem to Be Leaking?
Some drivers notice a nail and the tyre seems completely fine, with no pressure loss at all. Don’t assume this means it’s not a problem. The nail could be sitting in a spot that hasn’t broken through the inner liner yet, and it can start leaking days or weeks later. Get it checked as soon as you reasonably can, rather than waiting for the tyre to start losing pressure.
The Bottom Line
A nail in your tyre isn’t automatically an emergency, but it isn’t something to ignore either. Leave the nail in place, check how the tyre is holding up, and drive carefully to a garage rather than pulling over on a busy road to inspect it yourself. Whether it’s a quick repair or a full replacement depends on where the nail landed and how the tyre held up before you noticed it.
