MG ZS EV MK1 strange behaviour

Daveap

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Driving
I have driven my 70 plate ZS MK1 from new and have 43,0000 miles on the clock.
It has been serviced regularly by MG, it is still on the original tyres and has been very reliable with short 5 mile journeys and occasional 500+ trips too. I am a happy MG owner.

Warranty jobs have included new HVAC fan control unit, rear window washer pipe reattached twice and one key fob replacement. No quibbles from MG.

I have experienced three car initiated emergency stops but with explainable scenarios for cause (camera just confused with street layout). No real concerns there - it’s a technology drawback but I would rather have these rare occurrences than switching off the safety feature.

A few weeks ago I was nearing the end of a short 3 mile journey home when I took my foot off the accelerator waiting for the KER3 setting to gently slow my speed for a left hand turn off a dual carriageway (as I normally do almost every day on this route).

Unexpectedly rather than slowing the car it accelerated. Self preservation kicking and I hit the brakes hard (but not hard enough for the anti-skid to kick in).

Strangely the car then lost all power and stopped at the side of the road. Screens all blank.

A little shaken I powered down the car and then powered up again. All normal again, and drove the remaining 600 metres home.

It has not happened since and hence reluctant to book into MG as “no fault found” is likely scenario (I will certainly take it straight in if it happens again). I am now thinking a few weeks later was this a bad dream?

Has anyone experienced similar or would like to offer a potential explanation etc.?

Interestingly there is a cellular mast close to where the incident occurred but I have literally driven the route 100’s of times without issue.

Dave
 
Dave, are you sure you did not flick "ACC re-engage" on the left bottom lever when signalling left on the indicators?
Of course that doesn't explain the power loss.
I assume you did not push the power off button?
I suppose if you took it to MG they could interrogate the computer which might show something?
 
A few weeks ago I was nearing the end of a short 3 mile journey home when I took my foot off the accelerator waiting for the KER3 setting to gently slow my speed for a left hand turn off a dual carriageway (as I normally do almost every day on this route).

Unexpectedly rather than slowing the car it accelerated. Self preservation kicking and I hit the brakes hard (but not hard enough for the anti-skid to kick in).

Strangely the car then lost all power and stopped at the side of the road. Screens all blank.

Could be many things ... what was the battery charge, if close to 100% (guess it wasn't), KERS is not engaging. Was the KERS in 3 for sure? If KERS failed on that occasion (guess it works fine now?), not sure what else could cause it not to engage....

Guess it was going downhill so the car would accelerate if KERS not engaged... How fast was this acceleration realistically (discounting your panic on KERS not slowing you down 😉) - it wasn't as if you pressed the accelerator hard?

The car losing all power on hard breaking could be safety kicking in with the car assuming it's an emergency stop and shutting down the main battery power to prevent fire risk ?
 
Check your 12v battery connections are tight.

All sorts of issues come from terminals not being tight and weird electrical goings on is just one of them. (ICE and EV).
 
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