Central locking and key programming

Central locking and key programming

Central locking is one of those small comforts you take for granted — until it stops working. Then it quickly becomes impractical: a door that has to be locked manually with the key, a boot lid that won't open, or an alarm that triggers itself in the middle of the night. We diagnose, repair and program everything from purely mechanical lock faults to modern key systems with chips and rolling codes.

Central locking faults and how we solve them

On older cars (typically pre-2005), central locking is often driven by a vacuum pump — a small compressor unit that sucks or blows air to pull lock cylinders in and out. These pumps wear out over the years, hoses crack or become porous, and the result is that some doors lock while others stay open. We repair hoses, valves and replace the pump where needed.

On newer cars each door is equipped with its own electric motor inside the lock. These actuators have a typical life of 10–15 years and the symptoms are classic: one door doesn't respond to the remote, the lock howls when opening/closing, or the door lock sticks in one position. Replacing the actuator in one door typically takes 30–60 minutes and is a relatively inexpensive repair.

Key programming — new or spare

Almost all cars newer than around 2000 have a transponder chip in the key that has to be recognised by the immobiliser before the engine will start. If you have lost a key or ordered a spare, the new key has to be paired with the car using diagnostic equipment. The programming itself is quick — typically 30–60 minutes — but the key blank and chip cost more than you might think.

A spare key is generally affordable if you still have the original — we can then copy both the physical cut and program the chip from the working key. If you have lost all keys, we have to go via the VIN number and the car's immobiliser module, and the procedure becomes considerably more involved — and more expensive.

Symptoms of key or lock faults

Common signs are: the key doesn't work at all (check the remote battery first!), remote locking has stopped but the key still starts the car, the alarm triggers even though the car is locked, the engine won't start even though all electrical systems work (immobiliser fault), or the car thinks the key is too far away even though it's in your pocket (on keyless systems).

Time estimate and price

Programming a spare key when you have the original: typically 30–60 minutes, NOK 1,000–2,500 incl. key blank and chip. Replacement key when all are lost: 2–4 hours, NOK 3,000–8,000 depending on brand. Repair of a central locking actuator in one door: 1–2 hours, NOK 1,500–3,500. We always provide a fixed quote before starting.

Book an electrical repair online or call us on 41 17 32 24.