New Battery

[PhilT]

The X6 has started to show ‘increased battery discharge’ so I’m thinking the battery’s getting weak - has anyone replaced the original battery, and if so what with?

The original one doesn’t say if it’s an AGM so I’m unsure if I need to go for an AGM or not. Also, the original is 900CCA but all the replacements on Eurocarparts are less than that - will that be a problem?

I’d be grateful for any help or advice.

[X5Sport]

First you’ll need to code the replacement battery as the E71 also has the Intelligent Battery System fitted.

People have used Bosch Silver series AGM though there seems to have a been a bad batch given the number of premature failures a couple of years back.  Exide look to be a reasonable option.  I expect mine to start failing soon given the car is now 7.  I keep hooking a conditioner up to it as it isn’t being used much.

ECP website isn’t playing nicely at the mo, however Realoem states that the original 92Ah battery must be replaced with a 90Ah one.  That may bring the CCA down a bit?

[PhilT]

Cheers for the reply, mines around the same age. It fires up fine but seems to shut off certain options when it recognises low charge state - stuff like the lights don’t come in when I unlock the car etc.

I’ve got the Carly app & adaper so no problem with the coding.

So presumably it’s ok to replace with an AGM even if the original isn’t one?

[X5Sport]

Original should be an AGM.  Mine is.  I think the coding allows you to change the type and Ah rating - which simply tells the IBS what voltages and charge profile to use.

[PhilT]

Had a look on the labelling but couldn’t find any indication that it was AGM.

Thanks for the help - will give the Exide a try.