logo

BMW 740Li xDrive Car Battery 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

(442)

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

(442)

Car Battery Replacement Service

How much does a Car Battery Replacement cost?

On average, the cost for a BMW 740Li xDrive Car Battery Replacement is $390 with $250 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 BMW 740Li xDriveL6-3.0L TurboService typeCar Battery ReplacementEstimate$655.36Shop/Dealer Price$786.75 - $1166.75
2015 BMW 740Li xDriveL6-3.0L TurboService typeCar Battery ReplacementEstimate$646.35Shop/Dealer Price$774.65 - $1152.33
2014 BMW 740Li xDriveL6-3.0L TurboService typeCar Battery ReplacementEstimate$646.35Shop/Dealer Price$774.69 - $1152.40
Show example BMW 740Li xDrive Car Battery Replacement prices

What are car batteries and how do they work?

A car battery is an energy storage device that relies on a chemical reaction within the battery to produce electricity. The stored electrical energy is used to initially operate the starter motor, ignition system, and fuel system on your vehicle. Once your car engine is running, the alternator supplies the electricity needed for all vehicle systems and charges the battery to replace the electric energy used when starting a car.

Most electric vehicles have a traction battery which is in addition to the standard 12 volt battery that is used to start the car engine. Traction batteries also convert chemical energy to supply electrical energy but operate at higher voltages and often are monitored by the PCM (Powertrain Control Module).

Battery

When to replace a car battery?

  • Your car doesn’t start. A new battery has a specified capacity to provide power. This capacity is referred to as the cranking amps rating of the battery. As a battery ages, the actual amps that a battery can supply becomes lower than its original rating Once the cranking amps fall below a critical threshold, it will be difficult or impossible to start your car.
  • Battery or charging system warning light is illuminated. Should a battery or charging system warning light illuminate, a mechanic should perform a few basic tests to determine if a battery replacement is needed.
  • Electrical components don’t work. Once a battery has started to fail, and the voltage produced by the battery drops, then vehicle electrical components can malfunction, such as the security system. If you are experiencing electrical malfunctions, it’s a smart idea to have the battery tested.

How do mechanics replace the battery?

  • A temporary power source might be installed to avoid the possibility of losing radio presets or stored data in the PCM while the battery is out. When the battery is already completely dead, this step is unnecessary.
  • The vehicle’s negative cable is removed from the battery, followed by the positive cable. The battery tie down system is loosened and the old battery removed.
  • Cable ends and wiring are carefully inspected to ensure cleanliness and no corrosion. In some cases, corrosion can be extreme and the cable may need to be replaced or wiring repaired.
  • The new battery is installed and the tie down system is reinstalled. Anti-corrosion compound is applied to the battery terminals. The positive terminal is reconnected followed by the negative terminal.
  • Some vehicles, for example some models of BMW, VW, and Audi, may require PCM programming to input battery parameters. This step, performed using a specialized scan tool, is necessary to maximize battery life and prevent electrical system malfunctions.
  • The car is started and charging system output is measured and compared against the factory OEM specification to ensure that the new battery will properly recharge. Generally, charging output will be in the range of 13.8 to 14.8 volts but the exact specifications vary by make and model.

Is it safe to drive with a battery problem?

Yes, but if you have a weak battery you might be left stranded somewhere if the battery dies completely and you cannot start your car. A faulty battery may also needlessly overload the alternator and could adversely affect the operation of the vehicle’s electrical system, including the vehicle security system and the shift interlock.

When replacing the battery keep in mind:

  • The quality of the electrical connections to the battery posts is important. Connections must be clean, free of corrosion and properly tightened.
  • Batteries store a large amount of energy and if short-circuited a battery could explode and can create intense discharges that can damage your eyesight. Insulated tools should be used to attach cabling to battery terminals. Otherwise, the battery’s positive cable can be shorted to ground or the positive and negative posts can be directly shorted. Batteries can only be safely installed from a positive terminal to positive wiring and from a negative terminal to body ground. If the polarity is reversed damage will likely occur to the vehicle’s electrical system.
  • Generally, a car battery will have a service life of 4 to 7 years. If a load test on a battery reveals a significant reduction in the capacity of the battery to provide power, you should buy a new battery rather than wait for the old battery to fail completely.
  • Batteries should only be disconnected if the engine is off and the alternator is not running. Disconnecting a car battery while the alternator is running can cause a voltage spike that will damage sensitive electronic components in the vehicle, such as the PCM.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Number of BMW Car Battery Replacement services completed
4862+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(442)
Rating Summary
429
6
4
2
1
429
6
4
2
1

Eduardo

13 years of experience
41 reviews
Request Eduardo
Eduardo
13 years of experience
Request Eduardo
by Mariano
BMW 740Li xDrive L6-3.0L Turbo - Pre-purchase Car Inspection - Villa Park, California
Eduardo is a top rate professional. I had him do a pre-purchase inspection on an out of state BMW 7 series that I am considering purchasing. He is very knowledgable, a great communicator and is willing to go the extra mile to ensure that I understood all aspects of this car, good or bad prior to making a decision to purchase. I will definitely use him again.

Christopher

6 years of experience
11 reviews
Request Christopher
Christopher
6 years of experience
Request Christopher
by Orlando
BMW 740Li xDrive L6-3.0L Turbo - Trunk Lift Support Shocks - Sacramento, California
Punctual and professional. Christopher is a good mechanic, he explained what he’s working on and how long the work is.

Joe

1 years of experience
13 reviews
Request Joe
Joe
1 years of experience
Request Joe
by Chris
BMW 740Li xDrive L6-3.0L Turbo - Serpentine/Drive Belt - Norman, Oklahoma
Phenomenal mechanic and an even better person. I’ll be recommending Joe to all family and friends.

Joshua

28 years of experience
709 reviews
Request Joshua
Joshua
28 years of experience
Request Joshua
by Ludwik
BMW 650i V8-4.8L - Battery - Hercules, California

Excellent Rating

(442)
Rating Summary
429
6
4
2
1
429
6
4
2
1
Number of BMW Car Battery Replacement services completed
4862+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

Recent articles & questions

P0374 OBD-II Trouble Code: Timing Reference High Resolution Signal A No Pulses
What What the P0374 code means The Powertrain Control Module (PCM) has discovered a problem in the high-resolution timing reference signal. What causes the P0374 code? There may be one or more causes for the P0374 code: A defective camshaft,...
Read more
How to Repair Dashboard Lights
Vehicle dashboard (https://www.yourmechanic.com/article/5-essential-things-to-know-about-your-car-s-dashboard) lights assist the driver in monitoring the various gauges of their car. These important lights include the...
Read more
How to Buy a Personalized License Plate in Kentucky
Adding Adding a personalized license plate can be a fun way to add a unique touch to your vehicle. You can use a personalized license plate to say something important to you, such as the name of your dog or...
Read more

Side mirror control switches not working

Hello. If these both stopped working at the same time, then you may have a power failure to the switches or a wiring problem in the door. It is common for the wiring that enters the door to get pinched...
Read more

Buzzing noise wheels steering

Hello. This can be caused by a number of things. Most of the time it is due to a brake pad sensor rubbing on the rotor. Once it does this long enough, it will break and the noise will stop....
Read more

TPMS Service light

Hello. Thank you for writing in. The vehicle is having issues recognizing the tires that were switched. These monitoring systems can be sensitive to changes and the smallest of damages. Chances are they just need to be reset. A technician...
Read more
  1. Home
  2. Estimates
  3. BMW
  4. 740Li xDrive
  5. Car Battery Replacement

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

Read FAQ
GET A QUOTE