Thermostat replacement

Fix slow warm-up or overheating caused by a stuck thermostat.

Typically £95 – £138 depending on your car · 1–2 hours

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

About this job

A thermostat stuck open means a cold heater and poor fuel economy; stuck shut, it can overheat the engine. It's a modest job with a big effect.

Signs you might need it

  • Heater slow to warm up
  • Gauge stays low
  • Engine overheats

What's included

  • Replacement thermostat and seal
  • Coolant top-up and bleed

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

Typical prices by car size

Small car (e.g. city car, supermini)£95
Medium car (e.g. family hatchback, saloon)£106
Large car / SUV / MPV£122
Premium or performance car£138
Small van / pickup£127

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

Thermostat replacement prices for popular cars

Questions about thermostat replacement

How long does thermostat replacement take?

Usually 1–2 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.

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