Fuel Injector Replacement Cost
Most people replace injectors they only needed to clean. Here is how to tell the difference and what everything actually costs.
Quick answer
$150 to $350 per injector
But cleaning ($50 to $100 total) fixes the problem 60% of the time. Try a $10 fuel system additive first. Then professional ultrasonic cleaning. Replace only if those both fail.
Fuel Injector Replacement Cost Estimator
Get a personalized estimate based on your vehicle and injector type.
Replacing all injectors at once saves on repeat labor
Estimated Total (1 injector)
$90
Range: $76 to $108
Parts
$60
Labor (0.3 hrs)
$30
DIY Savings
$30
Parts only: $60
You save vs dealership
$39
Clean or Replace?
Work through this in order. Most injector problems do not need replacement. The decision tree below saves most people $200 to $800.
Fuel system cleaner additive
$10 to $15Add one bottle to a full tank. Brands like Chevron Techron or Sea Foam work well. Drive 100 to 200 miles normally. If the rough idle or misfire clears up, you are done. This works when injectors are partially clogged with varnish deposits.
Professional ultrasonic cleaning
$50 to $100 for the full setA shop removes all injectors, tests flow rate, ultrasonically cleans each one, and flow-tests again. This restores injectors to near-new condition. Most injector specialists charge $10 to $20 per injector. If one injector fails the flow test after cleaning, only replace that one.
Single injector replacement
$150 to $350Only do this if the injector has failed the flow test after cleaning, or has a confirmed electrical fault (wiring or solenoid failure). On a low-mileage engine, replacing just the failed one makes sense.
Full set replacement
$400 to $1,200 (4-cyl) / $600 to $1,800 (V6)Makes sense on a high-mileage engine (over 100,000 miles) when one has failed and the rest are marginal on the flow test. Labor to access them is mostly the same whether you replace one or all. Replacing the set at once avoids a repeat labor bill in 12 to 24 months.
Direct Injection vs Port Injection
Which type your engine has makes a big difference to replacement cost. Most vehicles made after 2015 have direct injection.
$80 to $200 per injector
- +Operates at 30 to 60 PSI
- +Sprays into the intake manifold before the valve
- +Simpler design, widely available parts, easy to replace
- +Common on vehicles made before 2012 and many older engines still in production
$200 to $500 per injector
- !Operates at 1,500 to 2,900 PSI
- !Sprays directly into the combustion chamber
- !Precise engineering required, OEM parts often necessary
- !Standard on most post-2015 vehicles. Carbon buildup on intake valves is a separate known issue
How to check which type you have
Look up your engine code online or ask a shop to check. Many modern engines use both systems together (GDI + port injection) to reduce carbon buildup. If your vehicle has both, injector costs depend on which set has the fault.
Symptoms of Bad Fuel Injectors
These symptoms overlap with other faults. A scan tool reading cylinder-specific misfires is the fastest way to confirm an injector is the cause before spending money.
Rough idle
A clogged or leaking injector delivers uneven fuel to one cylinder. The engine shakes or hunts at idle because one cylinder is not firing cleanly.
Misfires on a specific cylinder
A P030X code (P0301, P0302, etc.) points to a specific cylinder. If swapping spark plugs and coils does not clear the code, the injector on that cylinder is the next thing to test.
Fuel smell
A leaking injector that drips fuel when the engine is off produces a strong petrol smell inside the car or in the engine bay. This is also a fire risk and should be addressed promptly.
Poor fuel economy
A stuck-open injector constantly over-fuels one cylinder. Fuel economy can drop 10 to 25%. You may also notice black smoke from the exhaust and a rich fuel smell from the tailpipe.
Hard starting
Injectors that leak when the engine is off drain fuel rail pressure overnight. The engine cranks longer than usual on cold mornings because it takes extra time to rebuild pressure before firing.
Hesitation under acceleration
A partially clogged injector cannot deliver enough fuel when you demand full power. The engine stumbles or surges rather than accelerating smoothly from low speed.
How to Pay Less
Four things that regularly reduce the final bill by $100 to $500.
Use an injector specialist, not a dealership
Dealerships charge 30 to 50% more than independent mechanics for injector work. A specialist who does fuel system work regularly will be faster and cheaper. For direct injection vehicles, find a shop with an ultrasonic cleaning machine before agreeing to full replacement.
Supply your own parts
Shops mark up parts by 20 to 40%. You can buy OEM or quality aftermarket injectors from RockAuto or Bosch direct for significantly less. Not all shops will fit customer-supplied parts, but many independents will. Ask before booking.
Confirm the fault before authorising work
A $75 diagnostic fee that includes a flow test is worth it. A shop that wants to replace injectors based on symptoms alone, without testing them, may be selling you work you do not need. A flow test takes 20 minutes and proves which injector has failed.
Replace the full set on high-mileage engines
Counter-intuitive, but replacing all four injectors on a 100,000-mile engine often costs less over two years than replacing one now and paying the same labor charge again in 12 months when the next one fails. Get a quote for both options and compare.
Common Questions
How much does it cost to replace one fuel injector?
A single port injector replacement runs $150 to $350 including parts and labor. Direct injection injectors cost more: $350 to $700 each because the parts alone are $200 to $500. Always ask whether the shop will replace all injectors or just the one that failed, since labor to reach them is often the same either way.
Can fuel injector cleaner fix a bad injector?
Fuel system cleaner additives ($10 to $15 a bottle) fix the problem roughly 60% of the time when the injector is partially clogged rather than mechanically failed. Add a bottle to a full tank, drive 100 to 200 miles, and recheck. If the misfire or rough idle clears up, you avoided a $300 repair. If it does not improve, move to professional ultrasonic cleaning before replacing anything.
What is the difference between port and direct injection?
Port injectors spray fuel into the intake manifold before the valve. They operate at 30 to 60 PSI and cost $80 to $200 each. Direct injection sprays fuel directly into the combustion chamber at 2,000 PSI or more. That pressure means the injectors are far more complex and cost $200 to $500 each. Direct injection is now standard on most vehicles made after 2015.
Is it worth replacing all injectors at once?
On a high-mileage engine (over 100,000 miles), yes. The labor to access the injectors is the biggest cost. If one has failed, the others have similar wear. Replacing all four on a 4-cylinder adds $200 to $400 in parts while saving a repeat $200 to $300 labor bill in 12 to 24 months. On a low-mileage engine with one obvious failed injector, replacing just that one is fine.
Prices are based on US national averages as of March 2026. Independent mechanics are typically 30 to 50% cheaper than dealerships for injector work. Always get a written quote that includes a flow test before authorising any replacement.