How much does car electrical repair cost?

Car electrics refers to the electrical components and systems found in a vehicle which can include everything from the battery and starter motor to the headlights and taillights.

Average cost of an electrics repair by location

Car electrical repairs can start from as little as £70 to replace brake lights while an alternator replacement can cost around £250. Hence, the exact cost of an electrical repair will depend on the nature of the faults and the parts that need to be replaced.

Average cost of an electrics repair by manufacturer

How do you know if your car’s electrics need to be repaired?

The music system, door locks, and lights are some electrical components of a car that if malfunctioning can point to a battery or electrical problem. Additionally, these are some common signs that your car electrics may need a repair:

Car won’t start

If the battery is flat or dead, the alternator or starter motor is faulty, this will cause issues with starting the car. When attempting to start a vehicle, a clicking noise is usually heard as a sign of electrical issues. The clicking indicates that there is not enough current flowing in the car's electrical system to start it.

Battery warning light on dashboard

The battery warning light or sometimes even the check engine light can light up which means there is an issue with the electrical system that needs to be fixed.

Faulty windows

Most newer cars have electric or power windows, unlike the older hand-operated windows. If there is a fault with the switches, motor or loose wiring, this will cause the power windows to malfunction

Headlight dimming

Dimming lights typically indicate low system voltage or a failure with the battery connections. This can result in dimly lit headlights, brake lights, tail lights as well as interior lights.

Frequently replacing and fixing blown fuses may also indicate an issue with the wiring system, which will require a specialist electrician to diagnose and fix.

Frequently asked questions about car electricals repair cost

How do I know if my car has an electrical fault?

If your car has an electrical fault, the most likely symptom is that the engine will not start. Other symptoms can include the engine stalling, the headlights and taillights not working, power windows not working and the radio not starting up. If you notice any of these symptoms, it is recommended to get them checked or diagnosed by a qualified technician as soon as possible.

How much is an electric diagnostic?

In the majority of cases, if a car won’t start it is most likely due to an electrical fault. In this case, a “Car Won’t Start” diagnostic carried out by a mechanic will go through the diagnostic error codes and read live data to pinpoint the cause(s) of the issue. The cost for an electrical diagnostic can range from £70-£100 depending on the type of vehicle.

What causes car electrical problems?

Electrical problems in a car are often caused by poor maintenance or a defective or old battery. In some cases, corrosion and loose wiring can result in faulty electrics.

Is it safe to drive a car with electrical problems?

No, it is not safe to drive a car with electrical problems. If there is an issue with the car battery, alternator or starter motor, the car may not run properly or may even stop running altogether which can leave you stranded while on a journey. Driving with faulty lights, especially in low light conditions is a safety hazard and can cause an accident.