Alternator replacement

Replace a failing alternator that's no longer charging the battery.

Typically £256 – £369 depending on your car · 1.5–3 hours

Get your exact price

Free, instant and no obligation. You won't be charged until the work is done.

About this job

The alternator charges your battery while you drive. If it fails, the car runs on battery power until it goes flat. The mechanic tests the output first to confirm the fault, then fits a replacement and checks the drive belt.

Signs you might need it

  • Battery warning light while driving
  • Lights dim or flicker
  • New battery keeps going flat

What's included

  • Replacement alternator
  • Drive belt check
  • Charging output test

Plus travel, disposal of old parts and a 12-month guarantee.

Typical prices by car size

Small car (e.g. city car, supermini)£256
Medium car (e.g. family hatchback, saloon)£284
Large car / SUV / MPV£327
Premium or performance car£369
Small van / pickup£341

Prices shown are starter estimates and are being finalised. The price on your quote is the price you pay.

Alternator replacement prices for popular cars

Questions about alternator replacement

How long does alternator replacement take?

Usually 1.5–3 hours. Your mechanic will tell you if your car needs longer.

Can it be done at my home?

In most cases, yes. Mobile mechanics need a safe, level place to park, such as a driveway or quiet street. If your job needs a workshop we'll let you know before you pay anything.

Is the price fixed?

Yes. The price on your quote is what you pay. If the mechanic finds something else, they'll explain it and give you a separate price – nothing extra is done without your OK.

Is the work guaranteed?

Yes – parts and labour are covered for 12 months. See our guarantee page for the details.

Related jobs