Author Topic: Alarm siren  (Read 1111 times)

Offline weejockvw

  • Not said much yet
  • **
  • Posts: 61
Alarm siren
« on: 06 July 2026, 14:23 »
My alarm siren isn’t working on my 2010 gti the part number is 1K8951605 cobra  can I fit 1K0951605c Bosch 

Offline Nino

  • I live here
  • *****
  • Posts: 2,737
  • Insta - F6UGA
Re: Alarm siren
« Reply #1 on: 06 July 2026, 19:27 »
Yes, it should work. The 1K0951605C Bosch siren is effectively the later replacement for the older 1K8951605 (Cobra) unit used on Mk5/Mk6 platform cars. VW superseded the earlier 1K8 part numbers with the 1K0 versions, and they're listed as interchangeable.

Just make sure the connector is the same (3-pin) If your old siren has failed, it's usually because the internal rechargeable battery has leaked and damaged the circuit board, which is a very common Mk5/Mk6 issue

VW Car history - Mk3 1.8 GL - Silver - 5 door, Mk4 1.8t - Silver - 3 door, Mk4 R32 - Black - 5 door, Mk5 GTi - Black - 5 door, Mk4 R32 - Deep Pearl Blue - 3 door, MK6 2.0 TDI - Graphite Blue - 5 door, MK7 GTD - Solid Black - 5 door.
Current - MK6 GTi Edition 35 - Candy White - 3 door.

Offline weejockvw

  • Not said much yet
  • **
  • Posts: 61
Re: Alarm siren
« Reply #2 on: 07 July 2026, 18:04 »
Thanks for your reply your right I cut open the old one and the battery’s leaked I’ll order a new one of the Bosch ones thanks again

Offline Nino

  • I live here
  • *****
  • Posts: 2,737
  • Insta - F6UGA
Re: Alarm siren
« Reply #3 on: 09 July 2026, 10:43 »
No worries, best of luck.

VW Car history - Mk3 1.8 GL - Silver - 5 door, Mk4 1.8t - Silver - 3 door, Mk4 R32 - Black - 5 door, Mk5 GTi - Black - 5 door, Mk4 R32 - Deep Pearl Blue - 3 door, MK6 2.0 TDI - Graphite Blue - 5 door, MK7 GTD - Solid Black - 5 door.
Current - MK6 GTi Edition 35 - Candy White - 3 door.

Online Snoopy

  • Moderator
  • Serious forum addict
  • *****
  • Posts: 7,791
  • Geoff.
Re: Alarm siren
« Reply #4 on: 10 July 2026, 09:03 »
Iirc the replacement i got for mine last year was 1K0 951 605 F
Cost over £200 and the stealers said it replaced both versions.
Garage:
Mk6 Golf GTI --- Mk1 Golf GTI --- Mk1 Leon TDI --- Mk1 Mini variant.
35+ years of GTI ownership.

Offline weejockvw

  • Not said much yet
  • **
  • Posts: 61
Re: Alarm siren
« Reply #5 on: 17 July 2026, 17:16 »
Just a wee reply to say got a 1K0951605C siren and it work great the car is 2010 and I’ve had it for 15 years it doesn’t get used much now I’m retired it’s more of a hobby still as standard as the day it was made and  still love driving it

Offline Nino

  • I live here
  • *****
  • Posts: 2,737
  • Insta - F6UGA
Re: Alarm siren
« Reply #6 on: 18 July 2026, 07:25 »
Just a wee reply to say got a 1K0951605C siren and it work great the car is 2010 and I’ve had it for 15 years it doesn’t get used much now I’m retired it’s more of a hobby still as standard as the day it was made and  still love driving it

That's great to hear, hope you continue to enjoy it for many more years. I have kept my Edition 35 almost standard. I have just replaced the multimedia system to something more in-keeping with today's needs and added a nicer OEM+ feel spoiler addon and rear defuser. Other than that, it's standard.

VW Car history - Mk3 1.8 GL - Silver - 5 door, Mk4 1.8t - Silver - 3 door, Mk4 R32 - Black - 5 door, Mk5 GTi - Black - 5 door, Mk4 R32 - Deep Pearl Blue - 3 door, MK6 2.0 TDI - Graphite Blue - 5 door, MK7 GTD - Solid Black - 5 door.
Current - MK6 GTi Edition 35 - Candy White - 3 door.