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Hassle-free knock sensor replacement

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knock sensor replacement
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up to 30% cheaper than average

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Manufacturer-equivalent

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How much does knock sensor replacement cost?

How much does knock sensor replacement cost?

Honest, upfront quotes and savings up to 30%

A typical knock sensor replacement in the UK costs around £180.34 - £231.61. Depending on your car brand, model and engine, and whether you live in a big city or a small one, the price of a knock sensor replacement on your vehicle can be higher or lower. We have computed prices for some of the best-selling cars in the UK in order to give you an idea of how much the knock sensor replacement should cost.

Car make and modelDealers
average price
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exclusive price
Instant savings

Ford Granada

1.6 litres

£254.52from £208.6218%

Seat Arona

1.6 litres

£275.97from £228.0717%

Saab 9-5

1.6 litres

£243.88from £201.5517%

Chevrolet Aveo

1.6 litres

£265.27from £219.2317%

Hyundai Terracan

1.6 litres

£278.11from £229.8417%

Hyundai S-coupe

1.6 litres

£276.25from £221.0020%

Landrover Discovery-ii

1.6 litres

£212.80from £180.3415%

Mitsubishi Starion

1.6 litres

£266.35from £231.6113%

Maserati Granturismo-s-semi-auto

1.6 litres

£258.69from £219.2315%

Rover 3500

1.6 litres

£262.99from £221.0016%

Rover 3500

1.6 litres

£262.99from £221.0016%

Mitsubishi Starion

1.6 litres

£266.35from £231.6113%

Hyundai S-coupe

1.6 litres

£276.25from £221.0020%

Chevrolet Aveo

1.6 litres

£265.27from £219.2317%

Ford Granada

1.6 litres

£254.52from £208.6218%

* The cost of your knock sensor replacement depends on your car make and model and may vary depending on your location.

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

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COVID-19 Update - Thursday, 5 August 2021

We fix your car, while you stay safe

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Contact-free collection
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Our trusted and certified garages

MILLENNIUM GARAGES

MILLENNIUM GARAGES

London, UK
stars-4
11 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-4
20 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-4.5
17 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
24 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-5
18 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 bu...
UNIVERSAL AUTOMOBILE ENGINEERS

UNIVERSAL AUTOMOBILE ENGINEERS

London, UK
stars-5
23 reviews
Universal Automobile Engineers Ltd in Stratford, East London. We are a local, independent garage, serving Stratford and the surrounding area. We are ...

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    from Cheadle
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    I was a little sceptical when I first discovered 'Fixter' .. £19 for an MOT ?? but, I was more than pleasantly surprised ... I arranged everything online, and my car was picked up from my home address, taken to a fairly local garage for it's MOT .. 'Passed', and was brought back to me by the s...

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    from London
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    First time I used them - MOT. Collection was on time, the car was taken to a reputable local garage, and passed the test without any extra work. They even did a basic valeting - all for £19. Impressive. Only little problem was that delivery back to me was 2 hours late and I wasn't told. I'd take hal...

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    from Brentford
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    Fixter collected my car, were very honest in their prices and feedback about any extra work needed. And recommended other areas needed attention at a later date. The whoile process was very efficient and reasonable cos-wise. My car is driving like a dream witrh new wheel bearings and a major service...

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    from Manchester
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    Fantastic service today. The car was collected and returned exactly to the times I wished and the extra job I requested had been carried out. The car had been cleaned inside and out also. Great work.

  • Margaret Haywood
    from Liverpool
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    Excellent service . Great value . Would certainly recommend it to anybody Will be using them again. Thanks so much.

  • Michael
    from Liverpool
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    Great and quick service

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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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

Find your car make

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Expert mechanics

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

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Collection to your door

Our fully insured Fixter Heroes collect and deliver to your door, with flexible time slots that suit you

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In-house expert advisors

Our friendly team of specialists will support you every step of the way and take care of your car from start to finish

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