How to Replace the Battery in a 1994 BMW 3-Series Key Fob

How to Replace the Battery in a 1994 BMW 3-Series Key Fob

Keyless entry remote grant easy access to your auto. When the key fob battery is dead you lose your keyless entry fob's ability to control distance opening function. In this post, we walks you through how to disassembly your key fob and replace your BMW key battery step by step.

What size battery does 1994 BMW 3-Series key fob take

Before you start to open keyless entry remote check all that you need: flat head screwdriver, phillips head screwdriver and 1 CR2025 battery.
  • 1xCR2025 battery
  • flat head screwdriver
  • phillips head screwdriver

Simple steps to replace the battery in your 3-Series's keyless entry remote

A tiny coin battery installed inside the your keyless entry remote. Remove screw on the back of the remote key fob. Spin the keyless entry remote over and look for at least one fastener holding in the plastic.

Delicately try to open your remote key fob with hands or flat head screwdriver. Remove CR2025 battery with flat head screwdriver.

Get new battery and install it in keyless entry fob's shell. Battery must be placed with the same polarity as was a previous. Your remote key fob will not work if you mistakenly place battery wrong way.

Before assembling fob’s case, check that all functions works by pressing buttons on circuit board.

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. If your remote key fob body tightly closed, we done. If not, repeat the last step. Screw the back of the remote key fob.

How to change the battery video instruction

How To Replace BMW 325 Key Fob Battery 1994 1995 2001 2002 2003 2004

Still not working? Buy new one

FAQ

Keyless entry remote of BMW 3-Series require 1xCR2025 batteries. Most CR2025 batteries are under $4-6 build upon the brand, type and size packaging you buy. You can take old battery to the store, to be sure.

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

Replacing your remote key fob battery is simple to do in 1994 BMW 3-Series. Most of car manufacturers think of the clients and make a special hole for key fob disassembly.

Dealer service cost for change the battery in keyless entry remote is from $30 to as high as $500 depending on the brand.

Remote key fob batteries in BMW 3-Series should be replaced once in 3-4 years, also this will differ based on usage and battery quality. If your keyless entry remote shortened signal strength, you should replace batteries before it stop open doors and make trouble for you.

These signs will alert you that it's perhaps time to change battery in your 1994 BMW 3-Series: multiple clicks to unlock or lock doors required, key fob buttons not working, low key battery indicator on dashboard and you didn't change battery more than 4 years.
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Fob Compatibility:

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