Mercedes-Benz S430 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 S430 Fuel Injector Replacement is $1691 with $1327 for parts and $364 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2000 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3160.22	Shop/Dealer Price$3865.91 - $5946.11
2004 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3092.79	Shop/Dealer Price$3766.12 - $5764.46
2005 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3092.79	Shop/Dealer Price$3766.26 - $5764.69
2001 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3092.79	Shop/Dealer Price$3766.25 - $5764.68
2003 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3092.79	Shop/Dealer Price$3773.98 - $5778.22
2002 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3092.79	Shop/Dealer Price$3766.99 - $5765.97
2006 Mercedes-Benz S430V8-4.3L	Service typeFuel Injector Replacement	Estimate$3154.07	Shop/Dealer Price$3842.93 - $5887.38

Show example Mercedes-Benz S430 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

(87)

Rating Summary

83

2

1

0

1

83

2

1

0

1

SEE REVIEWS NEAR ME

Caz

18 years of experience

146 reviews

Caz

18 years of experience

by Richard

Mercedes-Benz S430 V8-4.3L - Fuel Injector - Acworth, Georgia

Knowledgeable and professional.

Joshua

12 years of experience

4 reviews

Joshua

12 years of experience

by Rajesh

Mercedes-Benz S430 V8-4.3L - Pre-purchase Car Inspection - Woodland Hills, California

I have bad experience for The mechanic since the first scheduled mechanic is not came in on time and postpone my first car checkup.

Steven

22 years of experience

200 reviews

Steven

22 years of experience

by Tikina

Mercedes-Benz S430 V8-4.3L - Car Battery Replacement - Cedar Hill, Texas

Great service. Great personality. I would refer him to a friend.

Armando

11 years of experience

37 reviews

Request Armando

Armando

11 years of experience

Request Armando

by Jeffrey

Mercedes-Benz S430 V8-4.3L - Brakes, Steering and Suspension System - Miami, Florida

Had my 2002 Mercedes serviced. Was very professional. Went over the véhicle and gave me a détailed report of what needed to be done to keep it in top condition. Would use again and recommended to others.

Excellent Rating

(87)

Rating Summary

83

2

1

0

1

83

2

1

0

1

SEE REVIEWS NEAR ME

Recent articles & questions

P0571 OBD-II Trouble Code: Cruise Control/Brake Switch A Circuit Malfunction

P0571 means there is a problem with the switch that that deactivates the cruise control system which causes the cruise control to not function.

Symptoms of a Bad or Failing Parking Brake Warning Switch

If your car's Brake Warning Light comes on, especially if it gets brighter, you may need to replace the parking brake warning switch.

Symptoms of Bad or Failing Spring Insulators

Common signs include the vehicle bottoming out, excessive road noise, grinding noises while turning, and damage to front tires and brakes.

Automatic transmission issues, high RPM at low speeds

Hello, thanks for writing in about your 2000 Chrysler Cirrus. The transmission control module would need to be scanned to see if the codes stored may indicate the shifting problem you are having. You may have an internal shift solenoid...

I have a p0300 code changed all but the cat could that cause the code at all I fixed egr and spark plugs already and the cat smoke

The catalytic converter may certainly cause the P0300 random misfire code to show up due to the inability for the exhaust to properly breathe, which can cause un-burnt exhaust gases to reignite inside the catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement). A clogged or...

I have a 99 Ford [Taurus](/topics-taurus/) it starts without key in ignition. I put in new ignition switch and [starter](/topics-starter-ford/) but still starts when connecting battery

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 (844) 997-3624 · hi@yourmechanic.com