Injector Replacement Cost UK 2026 - Petrol & Diesel Prices

About this data · our methodology

This guide is based on fuel injector replacement pricing data derived from supplier quotes submitted through our network, specialist interviews, and real customer submissions [EM-QUOTE]. Our platform connects vehicle owners with 100+ UK-based engine and fuel system specialists, and this data reflects actual quoted market rates.

[EM-QUOTE] Derived from supplier quotes & interviews

[EM-SURVEY] Post-sale customer survey results

[THIRD-PARTY] External data from named industry sources

[INDUSTRY ESTIMATE] Informed estimate where no proprietary data exists

Review cycle: annually · next full review: January 2027 · prices are reviewed quarterly.

Injector replacement cost summary

What does injector replacement cost in the UK-

The short answer: Injector replacement costs range from £120 to £900+ per injector depending on fuel type. Petrol injectors are cheaper (£120-£500 per injector), while diesel injectors cost more (£300-£900+ per injector). For a full set of four diesel injectors, expect £800-£2,000+. Reconditioned diesel injectors cost £90-£190 each, while new replacements cost £250-£600+.

The longer answer: For most UK drivers, injector replacement is a common and often misunderstood expense. Here's what you can expect:

Petrol (single) £120-£500 fitted

Diesel (single) £300-£900+ fitted

Diesel (set of 4) £800-£2,000+ fitted

Reconditioned diesel £90-£190 + fitting

New diesel £250-£600+ + fitting

Petrol (set of 4) £480-£2,000 fitted

[THIRD-PARTY] Petrol injector replacement averages £120-£160, with RAC data suggesting around £185. Diesel injector replacement costs £300-£900 per single injector.

Injector replacement by fuel type

Fuel Type	Single Injector Cost	Full Set (4)	Labour Hours	Typical Labour Cost	Notes
Petrol	£120-£500	£480-£2,000	1-3 hrs	£80-£300	Generally easier to access
Diesel	£300-£900+	£800-£2,000+	2-6 hrs	£150-£600	Often seized - more labour
Diesel (reconditioned)	£90-£190 + fitting	£360-£760 + fitting	2-6 hrs	£150-£600	Best value option
Diesel (new OEM)	£250-£600+ + fitting	£1,000-£2,400+ + fitting	2-6 hrs	£150-£600	Most expensive option

[EM-QUOTE] These figures are derived from supplier quotes submitted through our platform. Prices are ex VAT and assume independent specialist labour. Main dealer costs are typically 40-60% higher.

Signs of injector failure

How to spot failing fuel injectors

🔄 Rough idleInjector not delivering fuel correctly at low RPM - have it checked

💥 MisfireInjector not firing or leaking - have it checked immediately

⛽ Poor fuel economyInjector leaking or over-fuelling - have it checked, costs you money

🖤 Black smokeOver-fuelling - too much fuel being injected - have it checked immediately

🔥 Fuel smellInjector leaking fuel externally - STOP DRIVING - fire risk

🚨 Engine management lightInjector fault codes - diagnostic check required

📉 Loss of powerInjector not delivering enough fuel - have it checked

🔑 Hard startingInjector leaking or not firing - have it checked

Critical warning: If you smell fuel, stop driving immediately. This indicates an external fuel leak, which is a fire risk. Have the vehicle recovered to a garage.

Cleaning vs repair vs replacement

Understanding your options

🧼 Injector Cleaning

£50-£150

Ultrasonic cleaning to remove deposits and restore spray pattern. 6-12 months warranty. Best for clogged injectors.

🔧 Injector Repair

£80-£200

Strip down, inspect, replace worn parts (seals, springs, nozzles). 6-12 months warranty. Best for worn seals, minor internal wear.

🔄 Reconditioned (Exchange)

£90-£200

Fully rebuilt, recalibrated, and tested to factory spec. 12-24 months warranty. Best for most owners - best value.

🆕 New Injector

£120-£900+

Brand new from OEM or aftermarket. 12-24 months warranty. Best for insurance claims, high-value vehicles.

Why diesel injectors cost more: Higher fuel pressure (1,500-2,500 bar), more complex internals, seizure risk in cylinder head, must be coded to ECU, and require calibration. Diesel injectors often seize - removal is difficult and time-consuming.

Injector replacement cost by vehicle type

Labour hours and costs by vehicle segment

Vehicle Segment	Example Models	Petrol (Single)	Diesel (Single)	Diesel (Set of 4)	Labour Hours
Small car	Fiesta, Corsa, Polo	£120-£300	£300-£500	£1,000-£1,600	1-3 hrs
Family car (FWD)	Focus, Golf, A3	£150-£350	£350-£600	£1,200-£1,800	2-4 hrs
Family car (RWD)	BMW 3 Series, Mercedes C-Class	£180-£400	£400-£700	£1,400-£2,000	3-5 hrs
Executive (RWD/4WD)	BMW 5 Series, Audi A6, Mercedes E-Class	£200-£450	£450-£750	£1,600-£2,200	3-5 hrs
Large SUV (4WD)	Range Rover Sport, Audi Q7, BMW X5	£250-£500	£500-£900	£1,800-£2,500+	4-6 hrs
Performance	Porsche, BMW M, AMG, Audi RS	£300-£600+	£600-£1,000+	£2,000-£3,500+	4-8 hrs
Commercial van	Transit, Sprinter, Transporter	N/A	£400-£800	£1,500-£2,200	3-5 hrs

[EM-QUOTE] These figures are derived from supplier quotes submitted through our platform. Prices are ex VAT and assume independent specialist labour. Main dealer costs are typically 40-60% higher.

Consequence of delay

Why you shouldn't ignore injector failure

Stage 1

Clogged or leaking injector

Cleaning or repair: £50-£250

Stage 2

Injector fails completely

Replacement: £120-£900+

Stage 3

Unburnt fuel washes cylinder walls

Engine wear: £500-£2,000+

Stage 4

Fuel dilutes oil → bearing failure

Engine replacement: £4,000-£10,000+

Ignoring failing injectors can lead to: unburnt fuel washing cylinder walls → fuel diluting engine oil → engine bearing damage → catalytic converter/DPF damage → catastrophic engine failure.

The cost of delay: Early diagnosis £50-£150 · Moderate failure £120-£900+ · Severe failure £500-£2,500+ · Catastrophic failure £4,000-£10,000+

Failure-prone engines

Which vehicles are most at risk

Manufacturer	Engine	Affected Years	Risk Level	Typical Issue
BMW	N47 2.0 diesel	2007-2015	⚠️⚠️⚠️ Medium-High	Injector failure - common
BMW	N57 3.0 diesel	2008-2016	⚠️⚠️⚠️ Medium-High	Injector failure - common
Land Rover	204DTD Ingenium 2.0	2015-2020	⚠️⚠️⚠️⚠️ High	Injector failure - common
Land Rover	306DT TDV6 3.0	2005-2016	⚠️⚠️⚠️ Medium-High	Injector failure
Mercedes	OM651 2.1 diesel	2008-2016	⚠️⚠️⚠️ Medium-High	Injector failure - common
Mercedes	OM642 3.0 V6	2005-2016	⚠️⚠️⚠️ Medium-High	Injector failure
Audi / VW	EA189 2.0 TDI	2008-2015	⚠️⚠️⚠️⚠️ High	Injector failure - very common
Audi / VW	EA288 2.0 TDI	2013-2020	⚠️⚠️ Medium	Injector failure - less common
Ford	1.6 TDCi	2005-2012	⚠️⚠️⚠️ Medium-High	Injector failure - common
Ford	2.0 TDCi	2008-2015	⚠️⚠️ Medium	Injector failure
Vauxhall	1.9 CDTi	2004-2010	⚠️⚠️⚠️ Medium-High	Injector failure - common
Vauxhall	2.0 CDTi	2008-2015	⚠️⚠️ Medium	Injector failure
Renault	K9K 1.5 dCi	2005-2015	⚠️⚠️⚠️ Medium-High	Injector failure - very common
Nissan	M9R 2.0 dCi	2008-2015	⚠️⚠️⚠️ Medium-High	Injector failure - common
Toyota	2AD-FTV 2.2 D4D	2006-2012	⚠️⚠️⚠️ Medium-High	Injector failure - known issue

Risk levels based on failure frequency data from specialist workshops and manufacturer known-failure patterns.

Diesel injector coding

Why diesel injectors need coding

When replacing a diesel injector, the new injector must be coded to the ECU. Each injector has a unique calibration code that tells the ECU how much fuel to deliver.

What is coding-

Entering the injector's calibration code into the ECU using specialist diagnostic equipment (e.g., VAG-COM, BMW ISTA, Mercedes STAR).

Why it's needed

Ensures correct fuel delivery - without coding, the engine may run poorly, fuel economy suffers, and the injector may fail prematurely. Usually included in labour or £50-£100 extra.

❌ What happens if coding isn't done

Engine runs poorly
Fuel economy suffers
Injector may fail prematurely
Engine management light may come on
Vehicle may fail emissions tests

✅ What happens when coding is done

ECU knows exactly how much fuel each injector delivers
Fuel is delivered precisely
Engine runs smoothly
Fuel economy is optimised
Emissions are minimised

Real injector replacement examples

What other owners actually paid

These anonymised examples are based on real quote requests submitted through our platform in 2025. [EM-QUOTE]

Vehicle	Engine	Year	Replacement Type	Cost	Notes
Ford Fiesta	1.6 TDCi	2012	Reconditioned	£350	One injector - rough idle
Ford Focus	2.0 TDCi	2014	New	£550	One injector - misfire
VW Golf	2.0 TDI	2011	Reconditioned	£400	One injector - black smoke
BMW 320d	N47	2014	New (OEM)	£650	One injector - rough running
BMW 520d	N47	2013	New (OEM)	£700	One injector - misfire
Audi A4	2.0 TDI	2012	Reconditioned	£450	One injector - hard starting
Audi A4	2.0 TDI	2012	New (set of 4)	£1,800	All four injectors - full set
Range Rover Sport	3.0 TDV6	2015	New (OEM)	£850	One injector - rough idle
Mercedes C-Class	OM651	2014	New (OEM)	£600	One injector - black smoke
Vauxhall Insignia	2.0 CDTi	2012	Reconditioned	£380	One injector - misfire
Ford Transit	2.2 Duratorq	2015	New	£700	One injector - poor fuel economy
Renault Megane	K9K 1.5 dCi	2015	Reconditioned	£320	One injector - rough idle

[EM-QUOTE] All quotes are anonymised from real submissions. Prices are ex VAT and assume independent specialist labour. Always verify with your chosen supplier.

Injector replacement labour

How labour time varies by vehicle

Vehicle Type	Labour Hours	Typical Labour Cost	Notes
Small car	1-3 hrs	£80-£250	Accessible - injectors often at front
Family car (FWD)	2-4 hrs	£150-£350	Moderate access
Family car (RWD)	3-5 hrs	£250-£450	More complex access
Executive (RWD/4WD)	3-5 hrs	£250-£450	Larger engine bay, more components
Large SUV (4WD)	4-6 hrs	£350-£600	4WD adds complexity
Performance	4-8 hrs	£350-£800	Twin turbo - very complex
Commercial van	3-5 hrs	£250-£450	Access can be difficult

Labour rates vary by region. Independent specialists charge £65-£160/hour. Diesel injectors often seize - removal takes longer.

What's included - and what's not

Know exactly what you're paying for

When you pay for injector replacement, here's what's typically included and what's not.

✅ Typically included

🔧

Removal of old injector

Professional removal from the cylinder head

🛠️

Fitting of replacement

Installation of the new/reconditioned unit

🔩

New seals and washers

Copper washers, O-rings (£10-£30 value)

💻

Coding (diesel)

Injector coded to ECU (£0-£100 value)

🔬

Testing

Running the engine, checking for leaks

♻️

Disposal of old injector

Environmentally compliant disposal

⚠️ Typically NOT included (extra cost)

🔧

Injector puller tool

If injector is seized - specialist tool required. Add £50-£150.

🔩

Cylinder head repair

If injector has seized - threads may need repair. Add £100-£500.

⛽

Fuel filter

Often recommended when replacing injectors. Add £20-£50.

🛢️

Fuel system flush

Removes contamination from failed injectors. Add £50-£150.

Before you agree

10 questions to ask before replacing your injectors

1. "Is this cleaning, repair, or replacement-"

Understand what you're paying for. Cleaning is cheapest, repair is mid-range, replacement is most expensive. Don't pay for replacement if cleaning would suffice.

2. "What's included in the price-"

Get a full written breakdown. Ask about: injector, seals, labour, coding (diesel), and testing.

3. "Is this a new, reconditioned, or used injector-"

New is most expensive, reconditioned is best value, used is cheapest but riskiest. Most owners choose reconditioned.

4. "What warranty do you offer on the replacement-"

Typical warranty: reconditioned 12-24 months, new 12-24 months, used 1-3 months. Get it in writing.

5. "Will you code the injector to the ECU-" (diesel)

Diesel injectors must be coded to the ECU. Ask if this is included and what tool is used.

6. "What happens if the injector is seized-"

Diesel injectors often seize in the cylinder head. Ask about the removal process and potential additional costs.

7. "Is a fuel filter change included-"

Fuel filters are often changed when replacing injectors. Ask if this is included or an extra.

8. "What's the timeline from booking to completion-"

Single injector replacement typically takes 1-2 days. Full set takes 2-3 days.

9. "Do you have experience with my engine type-"

Some engines have known injector issues. Ask about their experience with your specific engine.

10. "Can you provide a written quote-"

Get everything in writing before agreeing. The scope of work, cost, timeline, and warranty terms should all be documented.

Frequently asked questions

Common questions about injector replacement

How much does injector replacement cost in the UK- +

Injector replacement costs range from £120 to £900+ per injector depending on fuel type. Petrol injectors cost £120-£500 per injector, while diesel injectors cost £300-£900+ per injector. For a full set of four diesel injectors, expect £800-£2,000+. Reconditioned diesel injectors cost £90-£190 each, while new replacements cost £250-£600+.

What are the signs of a failing injector- +

Rough idle, misfire, poor fuel economy, black smoke, fuel smell, engine management light, loss of power, and hard starting. Rough idle and misfire are the most common early signs. Fuel smell means stop driving immediately (fire risk).

What's the difference between petrol and diesel injectors- +

Diesel injectors operate at much higher pressures (1,500-2,500 bar) and are more complex. They also require coding to the ECU. This makes diesel injectors more expensive to replace - £300-£900 vs £120-£500 for petrol.

Can I drive with a failing injector- +

If the injector is leaking externally (fuel smell) - stop driving immediately (fire risk). If it's just rough running or poor fuel economy, you may be able to drive to a garage, but don't delay. Continuing to drive can damage the catalytic converter (petrol), DPF (diesel), and engine.

Should I replace one injector or all of them- +

If one injector has failed and the others are in good condition, replacing just the failed one is acceptable. However, if the injectors are high-mileage, it may be worth replacing all of them to prevent future failures. A specialist will advise.

What's the difference between cleaning, repair, and replacement- +

Cleaning: Ultrasonic cleaning to remove deposits (£50-£150). Repair: Strip down and replace worn parts (£80-£200). Replacement: New or reconditioned injector (£120-£900+). Cleaning is cheapest but only suitable for clogged injectors. Replacement is most expensive but ensures reliability.

Do diesel injectors need coding- +

Yes - diesel injectors must be coded to the ECU. Each injector has a unique calibration code that tells the ECU how much fuel to deliver. Without coding, the engine runs poorly. Coding is usually included in labour or costs £50-£100 extra.

How long does injector replacement take- +

Typical replacement time is 1-3 days. Single petrol injector: 1-2 hours (1 day with parts). Single diesel injector: 2-4 hours (1-2 days if seized). Full set: 1-3 days.

Can I replace injectors myself- +

Injector replacement is not a DIY job for most owners. It requires specialist tools (injector pullers for diesel), diagnostic equipment (coding for diesel), and careful handling. Incorrect installation can cause the injector to fail or leak. Use a specialist.

What's the most common injector failure- +

The most common failure is clogged nozzles (petrol) - caused by poor fuel quality or infrequent fuel filter changes. For diesel, the most common failure is electrical failure (internal solenoid) or mechanical failure (worn nozzle). Diesel injectors also often seize in the cylinder head.

Should I replace the fuel filter when replacing injectors- +

Yes - strongly recommended. The fuel filter can be clogged with debris, which may damage the new injectors. Most specialists include a fuel filter change or recommend it.

What happens if I ignore a failing injector- +

Ignoring failing injectors leads to unburnt fuel washing cylinder walls, fuel diluting engine oil, catalytic converter/DPF damage, and eventually catastrophic engine failure. Repair costs escalate from £120-£900 to £4,000-£10,000 for engine replacement.

Can injectors be reconditioned- +

Yes - diesel injectors can be reconditioned (exchanged) for £90-£190 each. Petrol injectors can also be reconditioned but are often replaced due to lower replacement cost. Reconditioned injectors offer like-new performance at a fraction of the cost of new.

Does injector replacement affect insurance- +

Any major mechanical work, including injector replacement, should be declared to your insurer. The work may affect vehicle value and should be recorded.

Related guides

Injector Replacement Cost UK
Petrol · Diesel · Reconditioned · New

What does injector replacement cost in the UK-

How to spot failing fuel injectors

Understanding your options

Labour hours and costs by vehicle segment

Why you shouldn't ignore injector failure

Which vehicles are most at risk

Why diesel injectors need coding

What other owners actually paid

How labour time varies by vehicle

Know exactly what you're paying for

✅ Typically included

⚠️ Typically NOT included (extra cost)

10 questions to ask before replacing your injectors

Common questions about injector replacement

Explore more injector cost information

Injector Replacement Cost UK Petrol · Diesel · Reconditioned · New

What does injector replacement cost in the UK-

How to spot failing fuel injectors

Understanding your options

Labour hours and costs by vehicle segment

Why you shouldn't ignore injector failure

Which vehicles are most at risk

Why diesel injectors need coding

What other owners actually paid

How labour time varies by vehicle

Know exactly what you're paying for

✅ Typically included

⚠️ Typically NOT included (extra cost)

10 questions to ask before replacing your injectors

Common questions about injector replacement

Explore more injector cost information

Injector Replacement Cost UK
Petrol · Diesel · Reconditioned · New