Audi A4 Fuel Injector Replacement Costs

Estimate price near me

Service Location

Customer Ratings

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

See availability

Customer Ratings

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a Audi A4 Fuel Injector Replacement is $566 with $471 for parts and $95 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2017 Audi A4L4-2.0L Turbo	Service typeFuel Injector Replacement	Estimate$1917.99	Shop/Dealer Price$2341.25 - $3543.52
2006 Audi A4L4-1.8L Turbo	Service typeFuel Injector Replacement	Estimate$1814.75	Shop/Dealer Price$2260.36 - $3545.90
2003 Audi A4V6-3.0L	Service typeFuel Injector Replacement	Estimate$3171.27	Shop/Dealer Price$3954.76 - $6246.06
2018 Audi A4L4-2.0L Turbo	Service typeFuel Injector Replacement	Estimate$1857.31	Shop/Dealer Price$2280.38 - $3482.12
1997 Audi A4V6-2.8L	Service typeFuel Injector Replacement	Estimate$1644.87	Shop/Dealer Price$2046.80 - $3193.34
2007 Audi A4V6-3.2L	Service typeFuel Injector Replacement	Estimate$3258.84	Shop/Dealer Price$4058.00 - $6356.89
2002 Audi A4V6-3.0L	Service typeFuel Injector Replacement	Estimate$3178.77	Shop/Dealer Price$3961.90 - $6252.94
1997 Audi A4L4-1.8L Turbo	Service typeFuel Injector Replacement	Estimate$2016.61	Shop/Dealer Price$2513.71 - $3964.63

Show example Audi A4 Fuel Injector Replacement prices

What is a fuel injector and how does it work?

A fuel injector is a fuel metering device that sprays atomized droplets of fuel in a specific pattern into the engine’s intake manifold or directly into the combustion chamber. The injector has a solenoid and valve within and the operation, or pulsing, of the solenoid is controlled by the powertrain control module (PCM). The PCM controls the solenoid’s “on” time in order to keep the air-fuel ratio optimized while the engine load and operating conditions constantly change. Fuel injectors are usually connected to a fuel rail located on the top of the engine and the fuel rail, in turn, is supplied with fuel under pressure from the fuel pump located in the fuel tank.

When to consider replacing a fuel injector:

Rough idle, loss of power, or misfiring. Poor engine operation has many causes but faults in the fuel injection system, including the fuel injectors, are high on the list of possibilities.
Odor of raw gas or visible leaks. Fuel injectors should not leak fuel into the intake manifold when the car is off. If you notice any fuel odor around your car, the possibility of a leaking fuel injector should be considered. There should be no external leak from a fuel injector. If an externally-leaking injector is suspected, do not start your car due to the fire hazard.
Check engine light. Some fuel injection failures, for example, a faulty solenoid, may cause a trouble code to be set in the PCM and that will cause the check engine light to illuminate. The codes are read and the fuel injector is tested directly, as needed.
Major engine repairs, engine replacement, or lengthy storage. All fuel injectors will have deposits given enough mileage. These deposits can cause an imbalance in the performance of the injectors from cylinder to cylinder. When an engine is already disassembled, or if you are installing a new engine, that is a perfect time to service the injectors as a set. All injectors have tiny internal filter baskets. A professional injector service facility will clean each injector ultrasonically and replace these filters for a relatively low cost.

How do mechanics replace a fuel injector?

Injectors can be serviced once removed from the car or replaced outright with new injectors. If the injectors are serviced, specialized cleaning and test equipment are required. The choice to repair versus replace will depend on exactly what is wrong with the injector as well as customer preference. Either option requires removing the injector from the car and the following procedure is typical:

Once the engine is cold, the pressure within the fuel rail is relieved by briefly running the engine with the fuel pump fuse out.
The upper plenum on the intake manifold is removed along with any cables, hoses, or wiring that restricts access.
The supply and return lines are removed from the fuel rail. The electrical connectors to each fuel injector are unlocked and removed. The fuel rail is then unbolted and removed from the intake manifold.
The injector(s) requiring replacement are removed from the fuel rail, taking care to not allow any debris to enter the exposed openings. An O-ring seal usually holds the injector very firmly in a finely polished bore in the fuel rail.
Using a new O-ring, the serviced or replaced injector is re-inserted into the fuel rail — using engine oil on the O-ring to prevent damaging it. O-rings in this application fit very tight to prevent fuel leaks.
The fuel rail is re-installed and the supply and return lines are re-connected. The plenum is re-installed along with all cables, hoses, or wiring.
Finally, the engine is run, there is a careful check for leaks, and the vehicle is road tested.

Is it safe to drive with a fuel injector problem?

Yes, so long as there is no external leak of fuel from a broken or malfunctioning injector, it is safe to drive the car. However, if the injector is known to be malfunctioning, it can cause engine misfires, excessive emissions or, in the case of a badly leaking injector, can overload and overheat the catalytic converter. Additionally, fuel efficiency will always be diminished if the fuel injectors are not working properly.

When replacing a fuel injector keep in mind:

Using high quality (Tier One) gasoline may reduce deposits on fuel injectors and prolong their life.
If an injector problem develops that requires removal of one injector, the best practice is to remove and service all of the injectors at the same time. That service might involve replacement of the electrically failed injector along with off-the-car cleaning of the remaining injectors. Serving all injectors at once ensures the injector set will be balanced, in terms of flow rates, and in turn promote smooth operation of the engine.
Do not use fuel system cleaning compounds, or procedures, unless such materials are specified by the manufacturer of your car.
On the car cleaning of fuel injectors is not as effective as off-the-car cleaning because injectors have tiny internal filter baskets that should be replaced as part of the process of servicing a fuel injector.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Meet some of our expert Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating

(388)

Rating Summary

356

15

2

2

13

356

15

2

2

13

SEE REVIEWS NEAR ME

Brian

18 years of experience

35 reviews

Brian

18 years of experience

by Karan

Audi A4 L4-2.0L Turbo - Car is not starting Inspection - Atlanta, Georgia

EXCELLENT mechanic! Went over my vehicle thoroughly and let me know everything that was going on and provided clear explanations. He is meticulous about his work and makes sure that each part of what he does is done well and is functioning properly. Willing to show you what he is doing and answer any and all questions professionally and competently. I highly recommend Brian and would not hesitate to have him work on my vehicle again.

Brett

10 years of experience

197 reviews

Brett

10 years of experience

by Anthony

Audi A4 L4-2.0L Turbo - Trunk Lock Actuator - Austin, Texas

Brett M. was AWESOME! He was originally just supposed to replace my trunk actuator, but he also spent a long time inspecting my engine to identify where my coolant leak was located. Once he examined the engine he found a small oil leak as well. He then went above and beyond to remedy all three problems. The entire time he explained to me what was going on and made it a point to show me what the problems were and how to fix them the right way. Brett is the MOST TRUSTWORTHY mechanic I've ever met. He's extremely knowledgeable, courteous, and informative. I will strongly recommend him to all my friends and family.

Peter

25 years of experience

514 reviews

Peter

25 years of experience

by Saul

Audi A4 L4-2.0L Turbo - Ignition Coil - Simi Valley, California

Very knowledgeable and honest

Chris

22 years of experience

2223 reviews

Chris

22 years of experience

by Derek

Audi A4 L4-2.0L Turbo - 110,000 Miles Maintenance Service - Grand Terrace, California

Awesome

Excellent Rating

(388)

Rating Summary

356

15

2

2

13

356

15

2

2

13

SEE REVIEWS NEAR ME

Recent articles & questions

The Best Used Cars to Buy For Fuel Economy

Saving money on gas is an important factor to consider when buying a car. The Honda Civic, Toyota Prius, and Ford Fusion all have great fuel economy.

How to Register a Car in New York

For For some, moving to New York is a lifelong dream that they will stop at nothing to achieve. While moving to the Big Apple is exciting, there are a number of things that you will need to do. The...

Why ABS Control Module Replacements Can Be Tricky

Replacing the ABS control module can be challenging, as it is likely to be connected to many parts of a motor vehicle.

What is the Security indicator light on the dash?

Your Altima comes from the automaker with a security system built into it. You’ll notice that the Security indicator light blinks in the dash – it should do this when the key is off (or not inserted), when you turn...

Side mirror control switches not working

Hello. If these both stopped working at the same time, then you may have a power failure to the switches or a wiring problem in the door. It is common for the wiring that enters the door to get pinched...

2003 Nissan Altima

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com