Audi S7 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 S7 Fuel Injector Replacement is $3107 with $2701 for parts and $406 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2015 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$5850.88	Shop/Dealer Price$7227.33 - $11297.94
2013 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$5824.75	Shop/Dealer Price$7188.39 - $11249.39
2016 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$6330.35	Shop/Dealer Price$7820.58 - $12260.92
2014 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$5824.75	Shop/Dealer Price$7188.56 - $11249.70
2018 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$6329.67	Shop/Dealer Price$7815.91 - $12252.88
2017 Audi S7V8-4.0L Turbo	Service typeFuel Injector Replacement	Estimate$6330.35	Shop/Dealer Price$7812.89 - $12247.47

Show example Audi S7 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

(6)

Rating Summary

6

0

0

0

0

6

0

0

0

0

SEE REVIEWS NEAR ME

AL

13 years of experience

245 reviews

AL

13 years of experience

by Jesus

Audi S7 V8-4.0L Turbo - Spark Plugs - Denver, Colorado

Al was extremely friendly and knows exactly what he is doing. Gave me a few pointers to keep an eye on to keep the car running healthy Thank you again!

Leslie

25 years of experience

100 reviews

Leslie

25 years of experience

by Eric

Audi S7 V8-4.0L Turbo - Pre-purchase Car Inspection - Newtown Square, Pennsylvania

Leslie did a pre-purchase car inspection for me and I was very happy with his communication and the report. He arrived early and promptly called me once the inspection was done to let me know the results.

Christopher

11 years of experience

125 reviews

Request Christopher

Christopher

11 years of experience

Request Christopher

by Justin

Audi S7 V8-4.0L Turbo - Brake Rotor/Disc Replacement (Front) - Katy, Texas

Friendly and timely.

Nazareth

28 years of experience

345 reviews

Request Nazareth

Nazareth

28 years of experience

Request Nazareth

by Liam

Audi S7 V8-4.0L Turbo - Battery - El Monte, California

Excellent and very professional. Highly recommended!!! Took care of my Audi S7 and solved my problem with the car.

Excellent Rating

(6)

Rating Summary

6

0

0

0

0

6

0

0

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

Symptoms of a Bad or Failing Fuel Filler Neck

Common signs include a fuel smell coming from the car, the Check Engine Light coming on, and fuel leaks.

How to Replace a Positive Crankcase Ventilation (PCV) Valve

A positive crankcase ventilation valve improves emissions in modern engines. Signs of PCV valve failure include oil leaks and poor engine performance.

Rules of the Road For Tennessee Drivers

Whether Whether you’ve recently moved to Tennessee, you’re visiting on vacation, or you’ve lived in this beautiful state your whole life, you might be surprised at some of the specific state traffic laws you’ll find here. To make sure you’re...

Why would a truck crank but not start until a plug wire is removed?

The engine may have a shorted spark plug (https://www.yourmechanic.com/services/spark-plugs-replacement) that is shorting the coil (https://www.yourmechanic.com/services/ignition-coil-replacement) out. I would recommend replacing the spark plugs first then replace the coil pack if it continues to not start. If you need help with...

The back end of my car is sitting lower than it should and won't move more than a foot in drive or reverse.

Hello. From what you describe it would appear that your vehicle may be experiencing more than one issue. If the rear of your vehicle is noticeably lower than the front, it may be possible that some sort of suspension problem...

Just changed power steering fluid now car is making a roaring sound when I drive

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