BMW 640i 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

(4)

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

(4)

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a BMW 640i Fuel Injector Replacement is $1381 with $863 for parts and $518 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2015 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$2299.06Shop/Dealer Price$2753.76 - $4065.41
2012 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$4196.52Shop/Dealer Price$5122.49 - $7873.66
2016 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$2265.72Shop/Dealer Price$2709.15 - $4012.35
2017 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$2265.72Shop/Dealer Price$2703.99 - $4003.31
2013 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$4196.52Shop/Dealer Price$5132.18 - $7890.63
2014 BMW 640iL6-3.0L TurboService typeFuel Injector ReplacementEstimate$2265.72Shop/Dealer Price$2710.05 - $4013.93
Show example BMW 640i 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

(4)

Rating Summary
3
0
0
1
0
3
0
0
1
0

Tinashe

14 years of experience
781 reviews
Tinashe
14 years of experience
BMW 640i L6-3.0L Turbo - Oil Change - Smyrna, Georgia


Omar

13 years of experience
287 reviews
Omar
13 years of experience
BMW 640i L6-3.0L Turbo - Creaking noise when turning the steering wheel - Fort Lauderdale, Florida
Knowledgeable, professional.

Jacob

13 years of experience
329 reviews
Jacob
13 years of experience
BMW 640i L6-3.0L Turbo - Brake Warning Light is on - Dallas, Texas
Jacob was outstanding!!! He provided a detail account of the services rendered and was very professional. He has a fantastic personality and is an asset to “Your Mechanic”. Very honest knowledgeable and trustworthy which are traits you don’t find often in the car service business.

Marco

30 years of experience
329 reviews
Marco
30 years of experience
BMW 328i L6-2.8L - Fuel Injector - Chino, California
Did fuel injector replacement and helped with a vacuum leak, thank you for your help!

Excellent Rating

(4)

Rating Summary
3
0
0
1
0
3
0
0
1
0
Number of BMW 640i services completed
44+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform

Recent articles & questions

Is Rustproofing Your Car a Good Idea?
Rustproofing Rustproofing and undercoating your vehicle can protect it from corrosion and rust (https://www.yourmechanic.com/article/how-to-repair-a-rust-hole-in-your-car). This is especially important for the undercarriage of your vehicle, which commonly comes into contact with substances such as water, chemicals such as salt, and other...
How Often Should Brakes Be Replaced?
Brake pads and brake rotors wear out over time. How long brakes last depends on the brake material, as well as your driving patterns.
How to Take the Doors Off Your Jeep
Jeeps Jeeps have been around since before WWII, and they’ve been modifiable since the very beginning. Because of their unique nature, Jeeps sit in a class all of their own: a coupe, a convertible, and a capable off-roader, all in...

What does the key reminder chime mean?

The key reminder chime sounds inside your vehicle when the driver’s door is opened, but the car is not yet turned off. This is an important safety feature that can keep you from locking your keys inside your car.

Car vibration when accelerating and cornering

Hello. This is typically either an engine mount (https://www.yourmechanic.com/services/engine-mount-replacement) or a cv axle problem. Both of these will cause this. Most of the time it starts out as a motor mount issue which will end up causing a failure in...

Hi Ben, there was no leakage before I went for an oil change. The service center replace a nut at the oil pan and its leaking oil

If you went to a service center, in all probability the work that they performed is covered under a warranty of some sort. Additionally, if you paid by credit card, for sure you are covered if you have encountered 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 (855) 347-2779 · hi@yourmechanic.com