Mercedes-Benz C240 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 Mercedes-Benz C240 Fuel Injector Replacement is $961 with $714 for parts and $247 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2001 Mercedes-Benz C240V6-2.6L	Service typeFuel Injector Replacement	Estimate$1726.09	Shop/Dealer Price$2128.38 - $3232.85
2003 Mercedes-Benz C240V6-2.6L	Service typeFuel Injector Replacement	Estimate$1674.09	Shop/Dealer Price$2076.46 - $3180.99
2004 Mercedes-Benz C240V6-2.6L	Service typeFuel Injector Replacement	Estimate$1674.09	Shop/Dealer Price$2076.45 - $3180.98
2005 Mercedes-Benz C240V6-2.6L	Service typeFuel Injector Replacement	Estimate$1674.09	Shop/Dealer Price$2076.35 - $3180.80
2002 Mercedes-Benz C240V6-2.6L	Service typeFuel Injector Replacement	Estimate$1674.09	Shop/Dealer Price$2076.53 - $3181.11

Show example Mercedes-Benz C240 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 Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(124)

Rating Summary

117

4

2

1

0

117

4

2

1

0

SEE REVIEWS NEAR ME

James

30 years of experience

873 reviews

James

30 years of experience

by Agustine

Mercedes-Benz C240 V6-2.6L - Car is not starting - Orlando, Florida

Very knowledgeable mechanic.

Adrian

12 years of experience

15 reviews

Adrian

12 years of experience

by Elena

Mercedes-Benz C240 V6-2.6L - Crankshaft Position Sensor - Miami, Florida

Adrian was great.

Ricardo

14 years of experience

339 reviews

Request Ricardo

Ricardo

14 years of experience

Request Ricardo

by Arnell

Mercedes-Benz C240 V6-2.6L - Brake Pads Replacement (Front, Rear) - Inglewood, California

Showed up even though I felt bad for the second time that it was raining with a smile! Ricardo does a great job in a timely manner and has good communication skills.

Jason

15 years of experience

344 reviews

Jason

15 years of experience

by jose

Mercedes-Benz C240 V6-2.6L - Brake Pads Replacement (Front, Rear) - Brooklyn, New York

Very informative, honest and willing to answer all my questions..thanks

Excellent Rating

(124)

Rating Summary

117

4

2

1

0

117

4

2

1

0

SEE REVIEWS NEAR ME

Recent articles & questions

How to Use Your Car Lights to Stay Safe and Legal

Following Following the rules of the road, including using your vehicle's various lights in appropriate situations, makes driving safer for you, your passengers, and other drivers. In addition to the headlights, vehicles come equipped with turn signals (https://www.yourmechanic.com/article/3-essential-things-to-know-about-your-car-s-turn-signal), brake lights...

How to Get Audi Dealership Certified

Audi car dealerships offer automotive technician jobs to mechanics who are Audi certified through the Audi Academy Technician Training Program.

How Does a Diesel Engine Work?

Diesel engines are growing in popularity as an option for cars. With diesel service, you will drive more efficiently and quietly.

valve tick on driver's side - 1971 Dodge Charger

Hello. This is very normal for nearly every car. When your car's engine is cold and has been sitting for a while, the oil that is brought to the top of the motor when the engine is running will slowly...

I have a2007 Mazda cx7 and the serpentine belt broke causing power steering to go out this is the second time this has happened in

The coolant that got on the belt and pulleys caused the belt to come off. You should have all the pulleys cleaned off of coolant and replace the belt. Check all the pulleys and tensioner for any problems before installing...

Transmission won't shift into park - 1988 Chevrolet S10

Hi and thanks for contacting YourMechanic. If your vehicle has a linkage, there should be an adjustment nut to adjust how long or short the linkage should be. Check for the nut and adjust the linkage to make the transmission...

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