How to Replace the Battery in a 2002 Audi A4 Key Fob

How to Replace the Battery in a 2002 Audi A4 Key Fob

Remote key fob allow easy access to your A4. When the key battery is dead or weak you will lose your fob’s ability to use remote opportunities. It's not complicated to change the battery in your keyless entry remote DIY. Everything you need is outlined below.

What size battery does 2002 Audi A4 key fob take

Changing battery in keyless entry remote require 1xCR2032 battery and flat head screwdriver. Prepare these materials and tools before opening and make sure to match the size of your fob’s batteries.
  • 1xCR2032 battery
  • flat head screwdriver

Step by step instruction

A tiny button cell battery installed inside the your key fob. Open key before you try to pry apart the keyless entry remote. Your key fob key can be unmounted with slide.

Carefully try to disassemble your key fob with flat head screwdriver. Replace one CR2032 battery with flat head screwdriver.

Now it's time to install new battery in fob’s shell. Battery must be installed with the same position as was a previous. Your remote key fob will not work if you mistakenly place battery wrong way.

After the new battery installed, verify keyless entry remote functionality by pressing buttons. If everything working good, assemble your fob’s case in reverse order.

The last thing to do is put your cover back on fob. Gently try to assemble the two halves in place by hands from top to bottom. Check your remote key fob shell for gaps. If it is not tightly closed try to repeat last step.

Video of key fob disassembly

2004 Audi A4 key fob battery replacement

Still not working? Buy new one


Key fob of Audi A4 use 1xCR2032 batteries. Most CR2032 batteries are under $6 depending on the size packaging, type and brand you buy. Take your old battery to the store, to find a proper replacement.

Often, after key fob battery replace, reprogramming not required. Don't be scare of this procedure, because often it's described in user's manual.

Changing your keyless entry remote battery is easy to do in 2002 Audi A4. Most of car manufacturers think about clients and make a special hole for key fob disassembly.

Dealer service pricing for change the battery in remote key fob is from $30 to as high as $500 depending on the make.

You should change batteries inside remote key fob of Audi A4 at least once in 4 years. The term of battery vary on their amount of use, operating conditions and quality.

If your auto signal strength reduced, fob's battery more than 4 years old, key fob buttons not working or has low key battery indicator on dashboard, it's probably battery replace in key fob needed. Currently installed battery is weak 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: MYT8Z0837231
  2. Models: 2002-2005 Audi A4