How to Replace the Battery in a 1993 BMW 3-Series Key Fob

How to Replace the Battery in a 1993 BMW 3-Series Key Fob

If your car key fob is no longer open doors correct, the battery probably needs to be replaced. Below, we outlined how to disassembly your car key fob and change your BMW key battery step by step.

What kind of battery keyless entry remote require

Before beginning disassembly remote key fob check all that you need: one CR2025 battery, phillips head screwdriver and flat head screwdriver.
  • flat head screwdriver
  • phillips head screwdriver
  • 1xCR2025 battery

Simple steps to replace the battery in your 3-Series's remote key fob

Inside of your keyless entry remote installed button cell battery. Remove fasteners on the back of the keyless entry remote. Spin the remote key fob over and find for at least one screw holding in the plastic.

Accurately try to pry apart your remote key fob with pry tools. Remove 1 CR2025 battery with flat head screwdriver.

Replace old battery with new one CR2025. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check polarity on battery, by "+" mark.

Before assembling fob’s case, make sure that all functions works by pressing buttons on key fob.

At this point squeeze keyless entry fob's back cover together. Line your shell pieces together and put it together by hands from top to bottom. Check your key fob body for gaps. If it is not firmly closed try to repeat last step. Screw fastener in the back of the remote key fob.

Video of key fob disassembly

Key Battery BMW HOW TO Change

Still not working? Buy new one


Key fob of BMW 3-Series require 1xCR2025 batteries. Price for CR2025 batteries are under $4-6 depending on the brand, size packaging and type you buy. Take your old battery to the store, to find a proper replacement.

Often, after remote key fob battery replace, reprogramming not required. Key fob reprogramming procedure often described in user's manual of your vehicle.

Yes, you can change battery in your 1993 BMW 3-Series keyless entry remote yourself. Most hard part is to disassembly fob’s case. It's pretty easy with our guide.

The price to replace the battery inside key fob is in range $50-600 depending on the car and the service station.

You should replace batteries inside key fob of BMW 3-Series at least every three years. lifespan of battery differ on usage time, operating conditions and quality.

If your car has low key battery indicator on dashboard, need multiple clicks to unlock or lock doors, signal strength reduced or fob's battery more than 4 years old, in most cases battery change in keyless entry remote required. Installed battery is discharged with a high probability, but if it's not help, keyless entry remote replace or repair needed.
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Fob Compatibility:

  1. FCC ID: A269ZUA071
  2. Models: 1993-1995 BMW 3-Series