Hi, first of two questions.

‘66 Plate Octavia Mk.3

One remote key fob stopped working yesterday. I unlocked the car normally, drove to my daughter’s house, went to lock the car - no joy. Had to take off the exterior cover and lock manually with the blade.

Ordered replacement 2025 battery - no joy.

Is it a matter of re-syncing the key to the car or do I need a replacement key fob and re-coding of the new fob?

If so, what do I need to search for locally as I suspect the dealer will charge north of £150-200?

I see you can buy uncoded fobs for £15-20

Cheers

Zaph

Edited 29 January29 Jan by ZaphodB
Additional details added

2 hours ago, ZaphodB said:

Ordered replacement 2025 battery - no joy.

Is it a matter of re-syncing the key to the car or do I need a replacement key fob and re-coding of the new fob?

Try a 2032 as it's a bit thicker.

Sounds like loose contacts

Mine did the same, just replaced with a 2032 (a good one, so maybe your new battery is flat too) and it worked.

Didn't need to recode

Thanks.

Turns out that there was a sticker (to do with kid safety) on the underside of the new battery (a Duracell 2025 dated March 2035)

Incidentally, the 2025 and 2032 codes refer to the diameter (20mm) and thickness (2.5 and 3.2mm respectively). Also CR indicates a Lithium battery, SR indicates a Silver Oxide which contain heavy metals and LR indicates an Alkaline battery. so a CR2032 is a lithium battery, 20mm in diameter and 3.2mm thick. Specifically C means a primary lithium battery (i.e. a non-rechargeable battery), R means round, S means silver primary and L alkaline primary. Coding also works for Lithium Polymer batteries such as the common 18650 (means 18mm diameter and 65.0mm long)

Now works fine. Feel stupid not noticing the sticker earlier.

Zaph

Edited 30 January30 Jan by ZaphodB

1 hour ago, ZaphodB said:

Feel stupid not noticing the sticker earlier

Packaging - not made for humans. ROFL. Easy mistake to make.

11 hours ago, varaderoguy said:

Packaging - not made for humans. ROFL. Easy mistake to make.

Yup - you're in good company Zaph. Easy mistake that many of us won't admit to

Gaz

15 hours ago, Gaz said:

Yup - you're in good company Zaph. Easy mistake that many of us won't admit to

Gaz

Thanks Gaz,

To be fair, it wasn't obvious. However, I'm not too proud to admit that sometimes I give a brick a good run for its money in the IQ department!

Zaph 😆

Edited 31 January31 Jan by ZaphodB