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We have a 2013 1.0 Titanium spec B-Max that has been giving us massive issues with battery drain. It started a few months ago and we originally put it down to lack of use during lockdown. Then problems became more frequent so we decided to replace the battery with a new one from Halfords.
Things seemed better for a few weeks but it was still being driven every few days. The car went into the garage for a (presumed) separate issue of a leak in the boot and an airbag module fault. Both faults were resolved in November.
But the battery drain persisted, and in December it would go from 100% charge to completely flat in less than a week.
The same garage had it in last week and said there was a 0.4A drain on the battery when off. With a 60AH battery, this was consistent with our estimate (6.25 days).
I’ve received a phone call today to say they have reduced the battery drain down to 0.1A, which is obviously better but still seems high to me? This was achieved by a combination of:
1) Replacing the battery (again)
2) Replacing battery wiring/harness (exact part TBC)
3) A software update performed by the main Ford dealer in town
However I have a couple of concerns before I collect it. Firstly, is 0.1A acceptable when off? By my maths, that will still be completely flat within 25 days.
Secondly, I’ve read of water ingress issues with rear parking sensors. Is this common? I mentioned it to the garage, but he’s not said anything specific on this. With our boot leak, it seems that might be connected? Especially when you look at the timing.
And finally, he said the start/stop still isn’t working and it might need a new body control unit. He’s quoting this work for me tomorrow. My main concern was the battery drain, but I assumed the lack of stop/start was linked to the battery fault and would have been fixed at the same time.
The repair costs for this car have mounted considerably in the last few months, so I’d appreciate any guidance you can offer before I contact the garage again.
Thanks in advance!
Things seemed better for a few weeks but it was still being driven every few days. The car went into the garage for a (presumed) separate issue of a leak in the boot and an airbag module fault. Both faults were resolved in November.
But the battery drain persisted, and in December it would go from 100% charge to completely flat in less than a week.
The same garage had it in last week and said there was a 0.4A drain on the battery when off. With a 60AH battery, this was consistent with our estimate (6.25 days).
I’ve received a phone call today to say they have reduced the battery drain down to 0.1A, which is obviously better but still seems high to me? This was achieved by a combination of:
1) Replacing the battery (again)
2) Replacing battery wiring/harness (exact part TBC)
3) A software update performed by the main Ford dealer in town
However I have a couple of concerns before I collect it. Firstly, is 0.1A acceptable when off? By my maths, that will still be completely flat within 25 days.
Secondly, I’ve read of water ingress issues with rear parking sensors. Is this common? I mentioned it to the garage, but he’s not said anything specific on this. With our boot leak, it seems that might be connected? Especially when you look at the timing.
And finally, he said the start/stop still isn’t working and it might need a new body control unit. He’s quoting this work for me tomorrow. My main concern was the battery drain, but I assumed the lack of stop/start was linked to the battery fault and would have been fixed at the same time.
The repair costs for this car have mounted considerably in the last few months, so I’d appreciate any guidance you can offer before I contact the garage again.
Thanks in advance!