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VW Passat Key Fob Battery Replacement Guide
How to change the battery in the key fob remote control for a 2012 to 2015 Volkswagen Passat with the part number.

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2015 Passat Key Fob
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Back Side of Remote Control

This automotive maintenance tutorial was specifically written to assist owners of the NMS (new midsize sedan) 2012, 2013, 2014, 2015 and the revised 2016 Volkswagen Passat sedan in changing the battery in the key fob remote control for the keyless entry system.

Owners of other VW Group vehicles such as the Beetle, CC, Tiguan, Golf, Touareg, Jetta, GTI, SportWagen, Eos, Rabbit, Bora, Vento, Lavida, Coccinelle, Maggiolino, Fusca, Audi A3, A4, S4, A6, S6, A7, A8, Q5, Q7, A5, S5, and TT may also find these DIY instructions to be helpful.

A replacement coin cell (A.K.A. "button" or "watch") battery is part number CR2032 which is available from various manufacturers such as Panasonic, Sony, Energizer, Duracell, and Maxell.

No tools are required to replace the battery. A small flathead screwdriver can be useful for opening the cover or prying out the old battery.

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Press Chrome Button
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Release Switchblade Key
Press the chrome silver button on the front of the key fob just above the "Lock" button to release the metal ignition key.

Insert your thumb in to the notch where the ignition key used to reside.

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Place Thumb In Notch
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Pop Out Battery Cover

Gently pop off the rectangular battery compartment cover on the rear of the fob.

If you have trouble removing the cover, you can try using a flathead screwdriver, plastic pry bar tool, coin, key, butter knife, nail file to carefully pry off the cover.

Set the battery cover aside in a safe place.

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Old Battery Exposed
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Pry Out With Screwdriver
Turn over the key fob and try to gently tap out the old battery.

If necessary, carefully use a small flathead screwdriver to pry out the old battery from the socket.



 

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Old Battery Removed
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Panasonic CR2032 3V
Try to avoid damaging the metal electrical contacts or the green plastic circuit board.
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Insert New CR 2032
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New Battery Installed
Gently pop in a new CR2032 3 volt coin cell battery in to the socket with the "+" positive side facing up towards you.

Make sure that the new battery is securely seated in the holder.

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Line Up Battery Cover
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Snap On Battery Cover
Line up the battery compartment cover over the back side of the key fob.

Gently pop the cover back in to place.

Make sure that the rear cover is flush with the key fob at every edge.

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Secure Ignition Key
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Test New Key Fob Battery
Swing the switchblade style metal ignition key back in to place.

To test the new key fob battery, stand in front of your Passat and press the "Unlock" or "Lock" buttons.

If the new battery is working properly, you should see the parking lights flashing and hear the door locks opening or closing.

For more, check out all of my Volkswagen Passat DIY Repair & Maintenance Guides.
 

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