2009 Audi A3 Key Fob Battery Replacement Instructions

2009 Audi A3 Key Fob Battery Replacement Instructions

If your A3 keyless entry remote isn't open doors correct, the battery most likely needs to be replaced. In this post, we demonstrate how to open Audi keyless entry remote and change a weak battery DIY. If you decide to do it at home near A3, use this instruction, but don't forget to check all you need before you start.

What type battery keyless entry remote require

Don't forget before disassembly remote key fob make sure that you have all recommended tools and materials: 1xCR2032 battery and flat head screwdriver.
  • flat head screwdriver
  • 1xCR2032 battery

Step by step instruction

Inside of your key fob installed small button cell battery. Open key before you try to pry apart the keyless entry remote.

Gently try to open your key with hands or flat head screwdriver. Replace 1xCR2032 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 keyless entry remote will not work if you by mistake place battery wrong way.

When the new battery installed, verify key fob functionality 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. Carefully try to assemble the two halves together 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 opening


Still not working? Buy new one


Key fob of Audi A3 use 1xCR2032 batteries. Most CR2032 batteries are under $4 depending on the size packaging, brand and type you buy. Take your old battery to the store, to be sure.

Often, after keyless entry remote battery change, you do not need to reprogram. Keyless entry remote reprogramming procedure often described in user's manual of your vehicle.

Yes, you can change battery in your 2009 Audi A3 remote key fob yourself. Most difficult part is to open fob’s case. It's pretty easy with our step by step guide.

Dealer service price for change the battery in fob is from $30 to as high as $500 depending on the car.

You should replace batteries inside keyless entry remote of Audi A3 at least once in four years. The lifetime of battery vary on usage time, operating conditions and quality. Lithium cells normally will last longer.

If your A3 need multiple clicks to unlock or lock doors, fob's battery more than 4 years old, has low key battery indicator on dashboard or signal strength reduced, in most cases battery replace inside key fob required. Current battery is weak with a high probability, but if it's not fix problem, key replace or repair required.
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Fob Compatibility:

  1. FCC ID: NBG 009272 T
  2. Models: 2007-2010 Audi A3