BMW M3 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 BMW M3 Fuel Injector Replacement is $488 with $348 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2012 BMW M3V8-4.0L	Service typeFuel Injector Replacement	Estimate$5080.56	Shop/Dealer Price$6252.53 - $9701.60
2001 BMW M3L6-3.2L	Service typeFuel Injector Replacement	Estimate$3020.07	Shop/Dealer Price$3730.40 - $5846.98
2008 BMW M3V8-4.0L	Service typeFuel Injector Replacement	Estimate$5147.85	Shop/Dealer Price$6329.71 - $9840.77
1994 BMW M3L6-3.0L	Service typeFuel Injector Replacement	Estimate$1495.77	Shop/Dealer Price$1837.86 - $2853.68
2013 BMW M3V8-4.0L	Service typeFuel Injector Replacement	Estimate$5067.73	Shop/Dealer Price$6241.70 - $9701.78
1995 BMW M3L6-3.0L	Service typeFuel Injector Replacement	Estimate$2357.51	Shop/Dealer Price$2915.39 - $4577.77
2011 BMW M3V8-4.0L	Service typeFuel Injector Replacement	Estimate$5050.83	Shop/Dealer Price$6208.55 - $9646.94
2010 BMW M3V8-4.0L	Service typeFuel Injector Replacement	Estimate$5050.83	Shop/Dealer Price$6208.42 - $9646.71

Show example BMW M3 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 BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(81)

Rating Summary

74

5

2

0

0

74

5

2

0

0

SEE REVIEWS NEAR ME

Matthew

12 years of experience

53 reviews

Request Matthew

Matthew

12 years of experience

Request Matthew

by ronald

BMW M3 L6-3.0L - Shock Absorber Replacement (Rear) - Alhambra, California

mathew was a great qualified mechanic., he was knowledgeable, and efficient.

Jesse

10 years of experience

12 reviews

Jesse

10 years of experience

by Wayne

BMW M3 L6-3.2L - Pre-purchase Car Inspection - Sarasota, Florida

Professional, Thorough, Courteous!!! Highly recommend his services!

Tom

43 years of experience

205 reviews

Tom

43 years of experience

by Omar

BMW M3 L6-3.2L - Door does not lock or open - San Jose, California

Tom is a very easy to work with. He appears to have lots of experience.

Mark

12 years of experience

349 reviews

Mark

12 years of experience

by Ron

BMW M3 L6-3.2L - Oil Change - Mountain View, California

Great guy

Excellent Rating

(81)

Rating Summary

74

5

2

0

0

74

5

2

0

0

SEE REVIEWS NEAR ME

Recent articles & questions

The Guide to Legal Car Modifications in New Hampshire

ARENA Creative / Shutterstock.com Whether you live in New Hampshire or plan to move there in the near future, you need to understand the laws surrounding vehicle modification. Understanding the following regulations will ensure that your vehicle...

P0283 OBD-II Trouble Code: Cylinder 8 Injector Circuit High

P0283 P0283 code definition The P0283 Trouble Code refers to cylinder 8 injector circuit high. What the P0283 code means If the P0283 code appears and is stored on your vehicle, it means that the engine cylinder 8 is not...

A Buyer's Guide to the 2012 Audi Q5

The The 2012 Audi Q5 is a compact SUV that is packed with features, both inside and under the hood. While it might not be the right choice for large families, most should definitely consider test-driving this vehicle. Key Features...

Can you drive with only 2 lug nuts instead of 3?

Hi thanks for your question. My advice is that this is very dangerous and the car should not be driven with only 2 lug nuts. If any of the remaining two were to also snap, this would cause catastrophic damage...

My car makes a weird squeaking sound when I hit the accelerator.

This is a common sign of a loose or worn belt. Over time, your car's engine belts may become worn causing them to stretch. When this happens as you press the gas pedal and the belt goes from a relatively...

2008 jeep grand Cherokee keeps going into limp mode

It's possible that water or dirt has infiltrated an electrical connection to a key sensor. That could cause the vehicle to go into limp mode or reduced power. The issue you are writing in about is common enough that a...

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