If your car has pressure sensors inside the wheels, a puncture repair involves more than the tyre. The sensor is bolted or banded to the rim right at the valve, and it is the single easiest thing to break when a tyre comes off. Force the bead over the sensor and you snap the stem. Reuse the old rubber grommet, washer and nut and you get a slow leak from the valve on a tyre that has just been repaired, which is a maddening way to spend a second call out.
So the correct process is to break the bead well away from the valve, work the tyre off with the sensor protected, and fit a fresh service kit before the tyre goes back on. The nut is torqued rather than nipped up, because overtightening cracks the stem. Afterwards the system may need a relearn so the car knows which sensor is where. All of that happens beside your car in Friern Barnet, on the drive or at the kerb near Friary Park, and it is included rather than being something we discover halfway through.
DVSA-compliant is not marketing language, it is a description of the method. We do it that way every time, at the car anywhere in N11, and where the damage falls outside what the standard allows we say so and fit a replacement instead. Old tyres leave Friary Park, New Southgate and N11 with us, every time. You watch it happen in Colney Hatch, or at the kerb in Whetstone.
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Permit parking fills the residential grid around Friern Barnet Road, and the last thing anyone wants after finally sorting a puncture is a warning light that will not go out. Doing the sensor properly the first time is a few minutes and a handful of small parts. We carry both, so it happens at the kerb rather than becoming a second appointment somewhere else.
A car near Woodhouse Road arrived with a broken sensor from a previous tyre change. The tyre was fine, the warning light was permanent, and the owner had assumed it was a fault with the car.
A vehicle off Colney Hatch Lane had a slow leak at the valve after a repair somewhere else. The service kit had not been renewed. A handful of small parts and it sealed properly.
A driver near Friern Barnet Town Hall had a light stay on after a wheel went back on. The sensor positions needed relearning, which took a couple of minutes once we knew that was the issue.
The small set of parts that seal the sensor to the wheel: the grommet or seal, the washer, the nut and usually a new core and cap. They are single use and should be renewed every time the tyre comes off.
Either the sensor was damaged, the service kit was not renewed and it is leaking slowly, or the system needs relearning so the car knows which wheel each sensor is on. All three are common after a rushed job.
No, but the tyre has to come off around it without touching it. That means breaking the bead away from the valve and working carefully, which is why it takes a little longer than it looks.
Yes, service kits and valves travel on the van as standard. It is not something we go away and come back for.
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