Audi A4 Quattro Fuel Injector Replacement at your home or office.

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Fuel Injector Replacement Estimate for Audi A4 Quattro

Audi A4 Quattro Fuel Injector Replacement costs $1107 on average.

CarServiceEstimateShop/Dealer Price
2009 Audi A4 QuattroV6-3.2LService typeFuel Injector ReplacementEstimate$3343.18Shop/Dealer Price$4183.98 - $6568.57
2008 Audi A4 QuattroV6-3.2LService typeFuel Injector ReplacementEstimate$3221.34Shop/Dealer Price$4031.01 - $6337.78
2011 Audi A4 QuattroL4-2.0L TurboService typeFuel Injector ReplacementEstimate$1181.87Shop/Dealer Price$1482.54 - $2237.86
2003 Audi A4 QuattroV6-3.0LService typeFuel Injector ReplacementEstimate$3148.77Shop/Dealer Price$3938.50 - $6234.49
2007 Audi A4 QuattroV6-3.2LService typeFuel Injector ReplacementEstimate$3221.34Shop/Dealer Price$4031.07 - $6337.89
1999 Audi A4 QuattroL4-1.8L TurboService typeFuel Injector ReplacementEstimate$2655.25Shop/Dealer Price$3320.80 - $5268.54
2001 Audi A4 QuattroV6-2.8LService typeFuel Injector ReplacementEstimate$1629.87Shop/Dealer Price$2037.70 - $3188.66
2014 Audi A4 QuattroL4-2.0L TurboService typeFuel Injector ReplacementEstimate$1197.57Shop/Dealer Price$1499.66 - $2256.43
Show example Audi A4 Quattro Fuel Injector Replacement prices

Fuel Injector Replacement Service

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.

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Sebastian

5 years of experience
6 reviews
Sebastian
5 years of experience
A4 Quattro 2004 - Car is not starting - West Palm Beach, FL
Very helpful ❗️To me and my car would recommend to friends

Zachery

6 years of experience
14 reviews
Zachery
6 years of experience
A4 Quattro 2002 - Battery - Columbus, OH
Zachery was very freindly and courteous. He explained everything in detail and was a very good experience. Will definitely use this service again.

Robert

15 years of experience
1061 reviews
Robert
15 years of experience
A4 Quattro 2003 - Fuel Pump - Arvada, CO
Robert was on time answered any questions

Charles

2 years of experience
72 reviews
Charles
2 years of experience
A4 Quattro 2007 - Fuel Pressure Regulator - Goodlettsville, TN
Well first off Charles showed up 30 minutes earlier than the appointment time which I appreciate he was very knowledgeable very courteous and had me up and running within 30 minutes literally nothing I have to say this is one of the best mechanic experiences I've ever had I would highly recommend Charles if you have any auto problems

Excellent Rating

(429)

Rating Summary
393
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9
393
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