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Update...
Strange goings-on with the battery and the data.
After my 100 mile round trip journey yesterday BimmerLink showed the SoC at 43%, which is obviously extremely low.
Today I did various checks :
Battery voltage at 'rest' (i.e. engine not running) was 13.6V.
Started the engine. Alternator output was 17.6V.
Voltage at the primary connections to the battery, engine running, was 17.5V (therefore the alternator output is reaching the battery).
Switched the engine off.
Disconnected the IBS, waited ~30 seconds, then reconnected.
Checked the SoC using BimmerLink. 52%.
Registered the battery again, using BimmerLink.
SoC then displayed as 72%.
Went for a 6 mile round trip drive, using manual mode to keep the revs between 1500-2000rpm so the alternator could work effectively.
SoC now shows as 79%.
Obviously I'll keep an eye on it but even though BimmerLink shows that I definitely registered the battery when it was first installed, perhaps the IBS didn't update correctly for some unknown reason.
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Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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