AGM Battery needed?
- Thread starter ashwales
- Start date
Well I’m going to disagree,lol.
My sister has a 2009 Petrol Mini Cooper with start /stop which she absolutely loathes and never , ever uses.
She had a few problems with a warning light about 2 years ago which turned out to be a steering sensor (which cured itself) and as part of the process of trying to find the source of the fault she decided to change the factory AGM battery.
After consultation with her we decided to fit a conventional lead acid battery ( bought a Bosch item) and all has been well for the last few years....
Am not saying this is the technically correct thing to do but it’s made absolutely no difference to the running of the car, not yet anyway.......
I know my brother-in-law had to have a new battery on his 2010 320d and not only did he have to have a new AGM fitted but he had to pay a BMW dealer to programme it to the car!
I guess it’s how ‘advanced’ the system is on the A3?
My sister has a 2009 Petrol Mini Cooper with start /stop which she absolutely loathes and never , ever uses.
She had a few problems with a warning light about 2 years ago which turned out to be a steering sensor (which cured itself) and as part of the process of trying to find the source of the fault she decided to change the factory AGM battery.
After consultation with her we decided to fit a conventional lead acid battery ( bought a Bosch item) and all has been well for the last few years....
Am not saying this is the technically correct thing to do but it’s made absolutely no difference to the running of the car, not yet anyway.......
I know my brother-in-law had to have a new battery on his 2010 320d and not only did he have to have a new AGM fitted but he had to pay a BMW dealer to programme it to the car!
I guess it’s how ‘advanced’ the system is on the A3?
If the car has stop start then it will have battery management which will mean that you should have to code a new battery using VAG-COM. If you replace the battery with one of the same size /type you will be OK though.
The coding has 3 parts to it. The manufacturer, the battery type number which is the technology and size of the battery, and a serial number for the battery. The serial number is only there because if you replace a battery with an identical spec item changing the serial number the battery manager knows it has a new battery. Changing any single digit in the existing serial number the battery manager thinks it's got a new battery.
AGM batteries have a different charging profile than a normal flooded cell battery. Part of the reason the battery is coded is to tell the battery manager what the battery size is and the battery type. It then knows the capacity of the battery and how it should be charged.
You can put a non AGM battery in and of course it will work. However don't expect the same life from the battery .
Varta silvers are the best battery to buy. Places like Tayna have pretty good prices.
https://www.tayna.co.uk/
I don't understand why people have such an aversion to stop/start systems. The wifes polo has it and It works fine.
The coding has 3 parts to it. The manufacturer, the battery type number which is the technology and size of the battery, and a serial number for the battery. The serial number is only there because if you replace a battery with an identical spec item changing the serial number the battery manager knows it has a new battery. Changing any single digit in the existing serial number the battery manager thinks it's got a new battery.
AGM batteries have a different charging profile than a normal flooded cell battery. Part of the reason the battery is coded is to tell the battery manager what the battery size is and the battery type. It then knows the capacity of the battery and how it should be charged.
You can put a non AGM battery in and of course it will work. However don't expect the same life from the battery .
Varta silvers are the best battery to buy. Places like Tayna have pretty good prices.
https://www.tayna.co.uk/
I don't understand why people have such an aversion to stop/start systems. The wifes polo has it and It works fine.
The stop/start systems in my experience are horrible!
Fine perhaps if you have a manual but my mum has a new automatic diesel Merc and with the system engaged no sooner does it halt than the engine cuts out.....damned awful when you really would like to creep forward at a tricky junction and suddenly nip out.
Might be ok though in city driving where you’re in a constant queue...
Fine perhaps if you have a manual but my mum has a new automatic diesel Merc and with the system engaged no sooner does it halt than the engine cuts out.....damned awful when you really would like to creep forward at a tricky junction and suddenly nip out.
Might be ok though in city driving where you’re in a constant queue...
What would happen if I don't get it coded with a new battery? I don't think the OEM battery in the car is a AGM one.
If it has stop start it will be AGM or EFB. I ma pretty sure they never made stop start cars with normal batteries. Post a picture of the top of the battery.
That is a standard battery. What year is your car ? Looks like the original battery.
It's a fairly large battery for an A3 probably just fitted the largest one that will fit.
I think they are 096 size. Measure the physical size to check should be
Length 278 mm
Width 175 mm
Height inc. terms 190 mm
I would fit a Varta silver, You wouldn't need to alter the coding.
https://www.tayna.co.uk/E44-Varta-Silver-Dynamic-Car-Battery-P7726.html
https://www.ebay.co.uk/itm/577400078-5-year-warranty-096-varta-battery-77ah-780a-e44/122740354915?
It's a fairly large battery for an A3 probably just fitted the largest one that will fit.
I think they are 096 size. Measure the physical size to check should be
Length 278 mm
Width 175 mm
Height inc. terms 190 mm
I would fit a Varta silver, You wouldn't need to alter the coding.
https://www.tayna.co.uk/E44-Varta-Silver-Dynamic-Car-Battery-P7726.html
https://www.ebay.co.uk/itm/577400078-5-year-warranty-096-varta-battery-77ah-780a-e44/122740354915?
