Battery warranty claim denied

[davman]

My brother in law has a V6 Amarok, and is a DC whizz as well. Had very similar issues that he first noticed with the Start/Stop feature not working correctly. Anyway he went down the same path as checking and isolating battery charge etc etc. He went to the dealer for a new battery, and they tried to fob him off saying that it was his DC additions that were draining the battery. Anyway, long story short, is that the factory had installed the wrong type of Alternator for his vehicle - they had installed one designed for a non stop/start vehicle. Problem disappeared and hasn't returned for nearly 2 years since.

[Dan_3MPS]

If anyone has a link to VW service info, please let me know. I've got reference for BMW and Mercedes, but not for VW.

There should be an electrical system document in amongst this lot I've had bookmarked for a while. Can't remember where I originally found it, credit to original poster if it belongs to someone on here.

Tiguan Owners manual - Google Drive

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[Ozsko]

There is an ongoing lengthy discussion on low voltage/dash cams on the UK Tiguan forum at the moment, it might be worth a read.

[cameleon72]

What is battery model ,brand and model number? Please upload picture here or link of uploaded pic if you can.

[Hillbilly]

There is an ongoing lengthy discussion on low voltage/dash cams on the UK Tiguan forum at the moment, it might be worth a read.

A link would be good if you have been reading it Ta

[harveyspecter1209]

Thanks for your insights and experience. The first thing when i noticed issues was to baseline the car without any accessories, jut so I could take any other factors such as cam or other current drawing devices out of the equation. This issue is not related to any of that. I ran a voltage data logger over the various states of the vehicle to at least confirm that all systems perform as expected. I can also run load tests as well but without the factory specs that doesn't mean much, hence my inquiry on the post for a link to the workshop manual. With the age of the smart alternators, we lost a lot of the simplicity which would have otherwise led you to a logical conclusion in simpler cars. Anyway, I'm 95% sure this is just a tired battery. It's not dead yet, but it's not in great health either.

In terms of dashcam stuff, I've installed a few PowerMagic setups for people and so far only one has come up bad and that was only because it had been badly wired. What I've fixed more of is auxiliary battery devices like the CellLink and people putting in relays where they don't belong. Don't get me wrong - they're good when professionally installed, but hook them up to modern vehicles without the right approach and boy you can create some dramas. You want to see some of the melted wiring I've pulled out.

The problem with getting a dealer to fix anything under warranty is that you have to let them prove the issue exists. A battery that's perhaps 40% degraded will be borderline stuff and as I said - my own stupidity that I handed it over just after charging. They would have needed to log voltage drop over time and map that against specs, which obviously takes time and heck, I won't begrudge them for not doing it. Anyway - I'll let it go for a while longer and hand it back to them when its a bit more run down. They can keep the car overnight next time and see the issue first hand.

If anyone has a link to VW service info, please let me know. I've got reference for BMW and Mercedes, but not for VW.

Visit Theriderbase to find more batteries that you maybe concern.

I dont know if there is the link you need or not, just try
Battery Warranty Coverage | Volkswagen Car Care

[Tob35]

I dont know if there is the link you need or not, just try
Battery Warranty Coverage | Volkswagen Car Care

That's no good... It's the USA website

[adrianb]

Hi DBO,
I also notice you have a BlackVue dash cam and that you use parking mode...

Thanks for your writeup and explanation here - we've got a BlackVue with the PMP and noticed the same thing - auto stop/start stopped working and the battery eventually degraded until it died completely. VW replaced it under warranty but even with the new battery auto stop/start doesn't work.

I'll look into that CellLink or similar battery and I think I'll turn off the parking mode monitoring in the meantime.

Again, thanks for the great writeup and advice!

[IsDon]

My pleasure