Finally got the LH Battery put in today.... Had been putting it off for a few months. It went a lot better than I thought it would, all things considered.
OK so today I picked up a battery from EuroCarParts, not a pukka VW one but a 100AH Exide Premium one with 5 year warranty. I've had good luck with Exide before so I was happy to go with it
Agree with everybody on here, change your battery - I had similar problems and others not mentioned, changed the battery and almost all problems disappeared.
AGM power supply/comfort battery replaced. Overall it went without a hitch. I had the choice of an Exide or a Varta AGM from Tayna Baatteries. The Exide with a price discount was about \u00a310 cheaper than the Varta, so I chose that one at \u00a3133 delivered.
Hi Mike, Varta G14 is the retail equivalent, assuming you don't order the OEM one from VW Parts.
I replaced mine also with the G14 and no problem at all, so it should work or your old battery broke becasuse of a defective module jorg
Here is a picture of the left battery that the factory put in my W12 when it was new. As you can see, it is labelled both 'Varta DE' and 'VW AG'.
Been meaning to post an update on this little saga... Eventually decided to get the LH battery replaced about a month ago and has completely cured the electrical problems. The car feels like new again and I love it again.
I purchased a new oem battery today. The 12v 92ah AGM 850A EN/ SAE 520A. Hopefully this solves my current issue. I'll know a little better in the morning on my way to work. At least my key fob works from greater distances now.
installed new Exide EK950 AGM 95AH to replace same model been there 3years. No change, and also former battery checks to be in nearly new condition still with measured 90AH capacity from fully charged to 10,5v 9hours with 10Amp load.
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This part for Volkswagen Phaeton is made around the world. We have reviews for battery manufacturers from countries such as: Germany, Czechia, USA .
In March 2026, the ranking of battery for Volkswagen Phaeton on PartReview included 3 manufacturers. It is based on 14 reviews and 43 votes.
Last month, PartReview users preferred OEM Volkswagen. 41% of positive votes went to this manufacturer.
In second place: battery Varta — 34%.
Third place: Exide with 13% of the votes.
In the overall ranking of battery, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
After seeing which battery owners of Volkswagen Phaeton prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
You can also see what Volkswagen Phaeton owners chose among such parts as: Thermostat, Control arm, and others.
