2008 BMW 3-Series Key Fob Battery Replacement Guide

2008 BMW 3-Series Key Fob Battery Replacement Guide

If your car key is not working perfectly, the cell battery surely needs to be replaced. In this article, we are going to tell you how to open BMW key fob and change a weak battery yourself. If you decide to do it at home near 3-Series, follow our guide, but first make sure you have all you need before you start.

What is the battery remote key fob use

Replacing battery in keyless entry remote require box cutter, flat head screwdriver, 1 CR2032 battery and super glue. Prepare these materials and tools before opening and make sure to match the type of your keyless entry fob's batteries.
  • 1xCR2032 battery
  • glue
  • razor knife
  • flat head screwdriver

Simple steps to replace the battery in your car's key fob

Inside of your remote key fob installed tiny button cell battery. Remove any internal key before you try to pry apart the keyless entry remote. To open this keyless entry remote you need scoring the edges with razor knife first.

Accurately try to open your key with flat head screwdriver. Replace CR2032 battery with flat head screwdriver.

Now it's time to install new battery inside keyless entry fob's body. Battery must be installed with the same position as was an old. Your remote key fob will not work if you mistakenly place battery wrong way.

When the new battery installed, check keyless entry remote by pressing buttons. If all functions works, assemble your keyless entry fob's body in reverse order.

The last thing to do is put your cover back on fob. Delicately try to put the two halves in place by hands from top to bottom. Inspect your key fob body for gaps. If it is not tightly closed try to repeat last step. Glue the back of the keyless entry remote.

Key Fob Battery Replacement 2008 BMW 3-Series Video

2008 BMW Key Fob Battery Replacement

Still not working? Buy new one


Keyless entry remote of BMW 3-Series require 1xCR2032 batteries. Most CR2032 batteries are under $6 build upon the size packaging, brand and type you buy. You can take old battery to the store, to be sure.

Remote key fob in most of cases reprogramming not needed after battery replace. If your keyless entry remote not working, recheck new battery voltage. Otherwise, read user's manual or contact local dealer.

Replacing your keyless entry remote battery is easy to do in 2008 BMW 3-Series. Most of car manufacturers think about customers and make a special hole for keyless entry remote disassembly.

Auto repair shop's cost for change the battery in keyless entry remote is from 50 to 600 dollars depending on the brand.

You should replace batteries inside remote key fob of BMW 3-Series at least every three or four years. lifespan of battery vary on their amount of use, operating conditions and quality.

If your 3-Series has low key battery indicator on dashboard, key fob buttons not working, fob's battery more than 4 years old or signal strength reduced, it's probably battery replace inside key fob required. Currently installed battery is dead or weak with a high probability, but if it's not fix, key fob replace or repair required.
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Fob Compatibility:

  1. FCC ID: KR55WK49147
  2. Models: 2006-2011 BMW 3-Series