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How much does it cost to replace an alternator?

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WhoCanFixMyCar has produced a handy guide highlighting some of the common problems with alternators and the likely cost of a replacement

Car repairs can be daunting, particularly when it comes to budgeting. But just how much is an alternator repair and how does alternator repair cost vary across car makes?

An alternator performs one crucial job; to keeping your car battery charged. The battery is of course necessary for starting up the car, spark plugs, lights, electrics, and power steering. Thus, it needs to be maintained and topped up by the alternator.

A failing alternator will cause your car to loose power. Eventually, a car cannot actually start without power in the battery as the starter motor needs electricity to crank the engine.

Common signs of problems with an alternator

  • Headlights may be either overtly bright or dimming

  • Your speedometer may have stopped working

  • A growling or whining noise when driving

  • Alternator warning light will be on – in most cases this is shaped like a battery but some cars will show ‘ALT’ or ‘GEN'

  • Smell of burning rubber

The average cost of alternator replacement by car manufacturer*

The average cost of alternator repair on WhoCanFixMyCar is around the £300 mark. However, the price as always varies across car makes. This is a result of the difference in price for parts for certain manufacturers and labour as the part will be easier to access on certain vehicles. Hence, making the repair a quicker process. Below we have compiled the average cost of alternator repair across the most popular car manufacturers on our roads today.  

Average Cost of Alternator Replacement by Manufacturer
Audi£334.33
BMW£382.19
Citroen£376.89
Ford£305.68
Mercedes-Benz£417.69
MINI£369.71
Nissan£340.32
Peugeot£353.62
Renault£360.88
Toyota£295.92
Vauxhall£306.08
Volkswagen£297.29
Volvo£312.74

*This table uses data from quotes provided on WhoCanFixMyCar.com between 01/07/2021 and 29/09/2021


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