Mercedes-Benz ML350 Fuel Injector Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(407)

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.

Customer Ratings

(407)

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a Mercedes-Benz ML350 Fuel Injector Replacement is $836 with $731 for parts and $104 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 Mercedes-Benz ML350V6-3.0L Turbo DieselService typeFuel Injector ReplacementEstimate$6616.09Shop/Dealer Price$8257.74 - $13139.38
2008 Mercedes-Benz ML350V6-3.5LService typeFuel Injector ReplacementEstimate$1671.04Shop/Dealer Price$2075.13 - $3200.60
2007 Mercedes-Benz ML350V6-3.5LService typeFuel Injector ReplacementEstimate$1671.04Shop/Dealer Price$2075.12 - $3200.59
2006 Mercedes-Benz ML350V6-3.5LService typeFuel Injector ReplacementEstimate$1671.04Shop/Dealer Price$2075.03 - $3200.44
2010 Mercedes-Benz ML350V6-3.0L Turbo DieselService typeFuel Injector ReplacementEstimate$5418.49Shop/Dealer Price$6755.79 - $10657.05
2011 Mercedes-Benz ML350V6-3.5LService typeFuel Injector ReplacementEstimate$1671.04Shop/Dealer Price$2075.12 - $3200.59
2011 Mercedes-Benz ML350V6-3.0L Turbo DieselService typeFuel Injector ReplacementEstimate$5432.49Shop/Dealer Price$6769.04 - $10669.75
2010 Mercedes-Benz ML350V6-3.5LService typeFuel Injector ReplacementEstimate$1682.04Shop/Dealer Price$2087.03 - $3213.19
Show example Mercedes-Benz ML350 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

(407)

Rating Summary
386
8
3
1
9
386
8
3
1
9

Michael

40 years of experience
131 reviews
Michael
40 years of experience
Mercedes-Benz ML350 V6-3.5L - Brake Light Bulb Replacement (Driver Side, Passenger Side) - Columbus, Ohio
Michael was great to work with and super friendly. He did a thorough inspection and was easy to talk to about the service. I highly recommend using him.

Jason

12 years of experience
13 reviews
Jason
12 years of experience
Mercedes-Benz ML350 V6-3.5L - Oil Change - Gwynn Oak, Maryland
I would recommend Jason to anybody who wants great service and who does excellent work.

Bryant

12 years of experience
596 reviews
Bryant
12 years of experience
Mercedes-Benz ML350 V6-3.7L - Power steering fluid is leaking - Fishers, Indiana
Bryant quickly diagnosed the issue and resolved the problem and also offered advice on some other vehicle related topics which was much appreciated!

Jose

10 years of experience
285 reviews
Jose
10 years of experience
Mercedes-Benz ML350 V6-3.5L - Oil Change - Thonotosassa, Florida
Jose is knowledgeable and confident in his work. He is very professional and trustworthy. Very impressed.

Excellent Rating

(407)

Rating Summary
386
8
3
1
9
386
8
3
1
9
Number of Mercedes-Benz ML350 services completed
4477+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

2007 Nissan Versa vs. 2007 Saturn Ion: Which One Should I Buy?
Compact cars as a class are generally meant to be commuter vehicles: with excellent gas mileage, an entry-level price point, and decent safety ratings for those who are on the road the majority of their time. These cars also make...
Symptoms of a Bad or Failing Mirror Control Switch
Common signs include mirrors not adjusting side to side or up and down, not adjusting at all, or not adjusting from the slave (passenger) switch.
Symptoms of a Bad or Failing Pinion Shaft Oil Seal
Common signs include leaking, low fluid in the differential, and grinding noises when the vehicle is running.

Clear liquid is leaking from the right side of the car, where could this be coming from?

It sounds like you may have an axle seal (https://www.yourmechanic.com/services/axle-shaft-seal-replacement) leaking. This may or may not have been caused by the axle replacement, or the seal could simply be hard and brittle. Any seal can become hard and brittle over...

What could be causing the serious vibrations in the steering column and front end when the truck exceeds 35 mph?

Hello, thank you for writing in. The most common issues with vibrations at higher speeds are related to the tires or suspension. The first place to start is having the tires inspected. Make sure the tread is deep enough, the...

Steering wheels move to the right when applied the brake.

Causes of brake pull include worn or warped rotors, a stuck caliper, a collapsed brake hose, worn suspension parts and uneven tire inflation. Vibration on braking is typically due to excessive thickness variation in the brake rotor, pad defects, or...

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