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
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Still not working? Buy new one