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Hassle-free knock sensor replacement

Get an instant quote and save up to 30%

knock sensor replacement
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Fair pricing

Fair pricing

We negotiate competitive rates with garages to offer the best prices, on average 30% cheaper than main dealerships.

Vetted garages

Vetted garages

We personally select and vet only the best local garages, fully covered by a 12-month warranty on parts and labour.

Collection from your door

Collection from your door

Our fully insured Fixter Heroes offer a collection and delivery service, with flexible time slots that suit you.

Advisors on your side

Advisors on your side

Our in-house experts make sure any quotes you receive are relevant and fairly priced, so no nasty surprises!

Our expert insights into knock sensor replacement

Our expert insights into knock sensor replacement

What does a knock sensor do?

The knock sensor is bolted directly onto the outside of the engine block and is used to detect vibrations and detonation “knock” noises from the engine to prevent engine damage.

What are the symptoms of a bad knock sensor?

Below are the top three symptoms that could indicate you need to replace your knock sensor:

  • Engine pre-detonation known as “pinking” or knocking
  • Reduced engine power
  • Increased fuel consumption

What happens when we do a knock sensor replacement on your car?

Our certified mechanics will:

  • Perform a diagnostic check to discover any fault codes coming from the knock sensor and other related parts of the engine.
  • Once they confirm that the knock sensor is faulty, they will fit a replacement knock sensor.
  • Once replaced, the mechanic will start the engine and recheck for fault codes.
View more symptomsView more symptoms

How much does it cost to fix my car?

Save up to 30% on your knock sensor replacement. See our table above to browse our honest, upfront prices.


Learn more

Daniel, from London

Hey Fixter, what causes a knock sensor to break?
Daniel
Nav

Nav, Fixter in-house mechanic expert

checked
Collection and delivery — anywhere

What does a knock sensor do?

The knock sensor is bolted directly onto the outside of the engine block and is used to detect vibrations and detonation “knock” noises from the engine to prevent engine damage.

What are the symptoms of a bad knock sensor?

Below are the top three symptoms that could indicate you need to replace your knock sensor:

  • Engine pre-detonation known as “pinking” or knocking
  • Reduced engine power
  • Increased fuel consumption

What happens when we do a knock sensor replacement on your car?

Our certified mechanics will:

  • Perform a diagnostic check to discover any fault codes coming from the knock sensor and other related parts of the engine.
  • Once they confirm that the knock sensor is faulty, they will fit a replacement knock sensor.
  • Once replaced, the mechanic will start the engine and recheck for fault codes.
View more symptomsView more symptoms

How much does it cost to fix my car?

Save up to 30% on your knock sensor replacement. See our table above to browse our honest, upfront prices.


Learn more

Daniel, from London

Hey Fixter, what causes a knock sensor to break?
Daniel
Nav

Nav, Fixter in-house mechanic expert

checked
Collection and delivery — anywhere

Our trusted and certified garages

Millennium Garages

Millennium Garages

London, UK
stars-5
15 reviews
Millennium Garages is based in Southwark, London offering numerous car repair services using state of the art equipment and fully trained staff with o...
Holocene Motor Group

Holocene Motor Group

London, UK
stars-5
28 reviews
Holocene Motor Group take care of your car. Located in Camden Road London, we provide a complete vehicle care package including routine servicing, MOT...
Blenheim Transport Ltd

Blenheim Transport Ltd

London, UK
stars-5
15 reviews
Blenheim Motor’s are a Servicing & Repairs Workshop, Recovery and Class 1, 2 & 4 MOT Testing Station with the 15 years of experience. We have fully eq...
Canning Car Care

Canning Car Care

London, UK
stars-4.5
19 reviews
At our workshop in Canning Town, you can expect friendly and professional customer service with expert technicians delivering quality vehicle services...
Dundalk Motors

Dundalk Motors

London, UK
stars-4
10 reviews
Dundalk Motors London is an established MOT centre and car repairs garage with over twenty-eight years of experience. Based in Brockley we’re in a bus...
Universal Automobile Engineers

Universal Automobile Engineers

London, UK
stars-4.5
26 reviews
Universal Automobile Engineers Ltd in Stratford, East London. We are a local, independent garage, serving Stratford and the surrounding area. We are ...

Here’s what our customers have to say…

  • Customer
    from Oldbury
    star
    star
    star
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    star

    Fantastic service! I received a text first thing saying my driver had been dispatched and was able to track his journey until he called me upon arrival. I was greeted by a polite and professional gentleman who did the checks on my car and told me about the process. I was given a call once my car had...

  • MrBrooks
    from Bury
    star
    star
    star
    star
    star

    Have used Fixter a couple of times in the last 2 months, slick service, easy to use and a great price. Will use again in the future! Highly recommend!

  • LeeM
    from Ashton-under-Lyne
    star
    star
    star
    star
    star

    No problems whatsoever I would certainly recommend fixter to family and friends. Thanks for a very efficient service 👍

  • NEIL WHEELER
    from Manchester
    star
    star
    star
    star
    star

    Exceptional service, value, and communication.

  • Mr Jack Edwards
    from Huddersfield
    star
    star
    star
    star
    star

    fast, reliable and very convenient

  • Customer
    from Huddersfield
    star
    star
    star
    star
    star

    Fast reliable and friendly

Book your next knock sensor replacement in less than 5 minutes.

Book your next knock sensor replacement in less than 5 minutes.

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Try Fixter today

Try Fixter today

mechanic

Your knock sensor replacement is in safe hands with our top-rated mechanics

We personally select every local garage based on our unique 25-point criteria, which includes staff qualifications, equipment standards and customer ratings.

Fully qualified mechanics with 10+ years’ experience 👨‍🔧

Your car is in the UK’s safest expert hands.

Manufacturer-equivalent parts only ⚙️

Identical to your manufacturer’s, but much cheaper!

In-house experts approve all work personally 🔍

Every service carried out by our partner garages is fully reviewed.

12-month warranty on parts and labour 🛠

Any additional work needed will be carried out for free.

Your knock sensor replacement is in safe hands with our top-rated mechanics

mechanic

We personally select every local garage based on our unique 25-point criteria, which includes staff qualifications, equipment standards and customer ratings.

Fully qualified mechanics with 10+ years’ experience 👨‍🔧

Your car is in the UK’s safest expert hands.

Manufacturer-equivalent parts only ⚙️

Identical to your manufacturer’s, but much cheaper!

In-house experts approve all work personally 🔍

Every service carried out by our partner garages is fully reviewed.

12-month warranty on parts and labour 🛠

Any additional work needed will be carried out for free.

Want to learn more about knock sensor replacement?

Want to learn more about knock sensor replacement?

We cover all makes and models — anywhere in the UK

We cover all makes and models — anywhere in the UK

We're here to help!

Our customer service team are available Monday to Friday, 9am to 5:30pm.