Non AGM battery, could this cause an issue On a "modern" BMW

[oooOLLIooo]

Hi all

I have a F11 520D
Could fitting a conventional wet type lead acid battery cause any issue?
I know the car is designed to have an AGM, but I have bought and fitted a non AGM already...

I would not mind reduced battery life (bearing in mind I don't use start/ stop anyway). I just would not want it to cause any other issue (ECU faults etc...)

Battery has been registered with the ECU at my local garage.

Would welcome your thoughts on this

Many thanks

[HustleRussell]

If you aren't using stop / start I can't see it being a particular issue. AGM batteries are used in stop / start cars because they generally provide higher Cold Cranking Amps (CCA), deal with repeated discharge better and recover faster.

[voicey]

If the battery is fitted in the cabin or the boot then an AGM will have been fitted as they don't vent toxic fumes.

[HustleRussell]

Modern maintenence-free lead acid batteries are sealed aren't they?

Back in the day BMW provided a vent pipe which you plugged into the battery...

[Dogwatch]

HustleRussell said:

Modern maintenence-free lead acid batteries are sealed aren't they?

Not completely. If you order one by post/courier there are stern warnings to remove the vent plug before use.

[Matt Seabrook]

Charging system requirements are different for AGM batteries are different. A good calsium battery will deliver about 40,000 starts compared to an AGM,s 360,000 with optimised charging. If the charging system is set up for AGM you may not get the best of a regular battery out of it. I know you have had the battery programmed back to the smart charging but it may not deliver optimal charging for your current battery. If you start getting strange error codes and electrical issues it may be a good idea to fit the correct battery.

[oooOLLIooo]

Thanks all