Do I need to reset the ECU after replacing the battery?


Sharing is Caring


Most ECUs are self-learning and should reset themselves after learning that a new battery has been installed. If you’re stuck, go to a mechanic for diagnostic assistance.

Can I replace BMW battery myself?

Many people wonder though, whether BMW battery replacement and registration is a simple DIY process or has to be done by an expert technician. We say: you can definitely handle the replacement on your own!

Do BMW batteries need to be programmed?

An often misunderstood and unappreciated point when it comes to replacing the battery in modern, late-model BMW’s is that the new battery has to be “registered” or matched to the onboard ECU for proper operation and battery longevity.

How do I reprogram my BMW after changing the battery?

  1. First of all, turn the ignition key of the BMW car to the accessory position once the lights and radio are on. You have to do this before starting the vehicle.
  2. Again, press the “Trip” button and hold until Reset appears.
  3. Then, press the same button for the third time.

Does it matter what battery I put in my BMW?

Your BMW car batteries should match the specifications of your current model. Most BMW vehicles, including those in the X3, X5, 3, 5, and 7 series, use BCI Group 94 49 H8 batteries. These batteries are also interchangeable, as they have roughly the same dimensions.

What happens if you don’t reprogram BMW battery?

If you don’t register it with the car, it causes the car to charge it too much or too little. Older batteries get more charge sent to it than newer ones, so putting a new battery in will cause the car to overcharge it, which prematurely kills your battery.

Do I need to reprogram my car after battery replacement?

No, you generally don’t have to reprogram your car after changing the battery. However, if your car has an onboard computer, it may need to be reset. Along with, This means that, if your car’s battery needs to be replaced, you can choose any replacement battery that fits your car โ€“ you don’t have to buy a BMW battery.

What happens if you dont code new battery?

A: Disregarding the need to register and code for a new battery may result in improper charging. Over time, improper charging may have detrimental effects on the lifespan of your cars battery and the operation of the vehicles electronics.

What happens if you put the wrong battery in a BMW?

A mismatched battery/alternator combo could cause your alternator to overheat and shorten its life.

How do I reset my car after replacing the battery?

To reset your car, just follow these easy steps: Detach the battery cable for two to three minutes. Reconnect the battery and start the car. Drive the car for at least 10 miles to let the engine control units find any potential problems.

How long does it take for a BMW computer to reset?

You can reset a BMW ECU by unplugging the negative battery cable for 10 to 15 minutes. This should be enough to reset the ECU in most BMW models. If this doesn’t work, you can also try jumpstarting your car to reset it. This will also help if the issue is a drained battery!

What brand battery does BMW use?

BMW does not manufacture batteries but they are manufactured for BMW using AGM technology by a German manufacturer and do have a BMW original equipment label on them and are marketed as BMW original eqipment battery. Exide is maybe an approved replacement,but is not what the car comes with.

What battery company BMW use?

EVE has signed contracts to be BMW’s primary supplier of the battery cells in Europe for its new series of electric vehicles due to hit the market from 2025, said one of the people who has direct knowledge of the deal.

How much does a new BMW battery cost?

How Much Does a BMW Battery Cost? The cost of parts and installation will vary between models, but your BMW battery replacement cost will likely come in between $300 and $500 when you factor in parts and labor.

How do I reset my BMW battery?

YouTube video

How do I know if my BMW needs a new battery?

  1. Dimming headlights.
  2. More frequent need for engine revving or jump starts.
  3. Takes longer to start the engine when you turn the key/push the button.
  4. Unusual power fluctuations.

How do I register my BMW battery?

YouTube video

Why is my car acting weird after a new battery?

This adaptive memory is stored in your vehicle’s volatile random access memory, also referred to as the VRAM. When you go to change your battery, and your car’s computer software is disconnected from the power, there is a chance that you may reset your car’s memory to the original default settings.

Do I need to save memory when changing car battery?

“A memory saver installed while making repairs provides an electrical path through the system and defeats the purpose of removing the battery. They may be okay to use for a simple battery replacement procedure but not during other repairs.”

What scan tools can register a BMW battery?

A battery registration must be performed with a BMW OBD2 scanner (also known as a BMW diagnostic scanner or code reader). The BMW scanner tool is simply plugged into the OBD2 port underneath the dashboard of your vehicle which connects electronically to the engine control module (DME).

Does unplugging battery erase codes?

Leaving the battery disconnected for about 15 minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Secure the negative cable back to the terminal and cover it with the cap (if applicable). Disconnecting the battery will clear the error codes and reset the check engine light.

Is it safe to jump start a BMW?

DO NOT jump-start the car and DO NOT let any roadside assistance service install a new battery in your BMW. It can be the most expensive battery or jump start of your life.

What are the signs of a weak battery?

Bad Battery Symptoms If the cranking of the engine is sluggish, like your vehicle is harder to start on cold mornings, it starts inconsistently, or there’s no sound and interior lights when you try to start, suspect a failing battery, a loose or corroded connection or electrical draw.

Can I use an H6 battery instead of H7?

The H6 and H7 are essentially interchangeable. These are the most common batteries in modern cars and fit most every European cars as well as many of the more modern American cars.

Does BMW need AGM battery?

Most BMW models use AGM batteries as they allow for faster charging and more power. Newer BMW models also have a computer system for the battery, which requires you to register the battery so that the computer knows you installed a new battery.

Craving More Content?

  • How do you flush the coolant on a BMW?

    How often should BMW coolant be changed? Typically, you should have your BMW coolant flush completed every 30,000 miles or every two years. There are some…

  • What is BMW real time traffic information?

    Real Time Traffic Information keeps you updated on the current traffic situation. Our service informs you of traffic congestion, traffic delays and incidents and can suggest…

  • What is BMW oil microfilter?

    Microfilter is one part, or area of BMW’s Conditioned Based Servicing or CBS. BMW/Mini currently use this system to determine whether your vehicle is due for…

Carolina's BMW