However, the choice that I currently consider most balanced in terms of performance/duration/cost is the VARTA Silver Dynamic AGM 95Ah.
Varta working for 6 years
Varta are the best ones I ever used. I use them in my car key too and its the only battery that lasts years instead of 2 months at most.
If you really want to buy this one (I find the price quite high, but I don’t know the specific market in Norway), buy an OBD adapter and EVScanner app on iOS with the BMW module. You can check the SOH of the battery and the general state of it as the replacement could be quite costly (around 1500 per module and you could have to replace up to the six if all fail or the BMS). I’d guess the SOH would be at best around 85%, maybe less. The engine itself is pretty reliable as it’s a detuned B48 from the 330i. Go to the infotainment and check the stats from factory and the percentage of eDrive kilometers (full electric) compared to the total kilometers, it would give you an idea of how the car was used and how much charging it got. This specific model of car is great to drive if you can charge everyday and you drive mainly short distances. I do around 80 km daily, almost all highway and my average consumption on those drives is 3.5 liters and 10 kWh/100, so it’s about 2/3 of the cost of my previous car, while beeing a lot better to drive. I’d still buy a 320 or 330i instead because there will be less things that could fail and I would probably not want to get such a high mileage PHEV without knowing how it’s been previously used. Source: I have a 330e from 2021 with 112k km and the SOH of the battery is 90% with around 1400 cycles. Average consumption since factory is 4.9 l/100 km and about half of the distance have been made fully electric.
I took a drive in my i4 a couple of weeks ago that estimated I'd get home with 4% battery. Guess what I rolled into the garage with..... 4% battery. These modern systems are pretty damn accurate.
I just replaced both batteries in my 2018 740iX. Was original battery (build date was Aug 2017) so actually lasted 8 years which was surprising given other problems I had with the car!
I still use a factory Audi (Varta) from 2014, so 11 years, but I'm not sure it will survive the first -15-25C this winter.
BMW 3 series in the right rear panel. The location is ok, but the box is just enough to slip in a group 49, and there is an air vent hose on the forward side, and a clamp on the rear bottom that is impossible to reach with anything but little elf hands. Then there's also the starter cable, battery management and regular wires running in the same area, all hopelessly in the way..
Dealer measured my 2021 m340xi battery at 700cca last week under load test (vs 850 cca capacity) and said battery needed to be replaced. Terminal was stamped 26th week of 2020.
Aracım 2012 model 1.4 tsi golf 7, aracımın güncel aküsü artık dipleri oynuyordu, marşı 3-4 defa basınca alıyordu, bende bu sebeple aküyü değiştirdim, aynı şekilde mutlu akü yerine efb start/stop destekleyen varta aküden 72 amper aldım, önceki akü de 72 amperdi. Aküyü taktık ve de yakıt dibin dibindeydi, gittim benzin aldım ve aldıktan hemen sonra epc ışığı yaktı, araç epc’yi yakınca gaz yemiyor, max. 20 km’yi geçmiyor. Gaz kelebeğini temizledik, yakıt deposuna kurum temizliği için ilaç döktük ilk etapta söndü ama tekrar yaktı. Ecu’dan aküyü tanımlatıp beyin sıfırlaması yapılması gerekiyormuş sanırsam, bunu henüz yaptırmadım yarın yaptıracağım ama bu aküden sebep midir? Eski o bitik akü’de bile böyle bir problem vermemişti.
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