MGS5 safety software fault - recall level problem? (reverse after hard stop; merged)

[Alb]

As a matter of interest, were you in OPD mode too?

 

[TimothyN]

Normally, yes.

 

[newMGS5]

We have the same problem !!

I today “discovered” a potential very serious safety bug with our 2 week old MGS5 - the joys of being an early adopter.

Steps to recreate this problem:

1. Drive in OPD mode - get up some speed
2. Do a hard stop/panic stop with the brake pedal
3. Come to a full stop then quickly take your foot off the brake - one would expect the auto-hold feature to hold the car in place
4. Instead the car starts to roll backwards. Actually it was more than roll . .it feels like the car is under power moving backwards as the harder the stop seemed to influence how fast it drove in reverse. The D indicator stays on the entire time - in my final test, done on a flat road, I let the car drive in reverse for 10 meters before stopping it.
5. Pressing the brake a second time does stop this reverse motion.

I will pop into to my dealer this weekend . . but I would ask that another MGS5 owner tests this bug - clearly on an empty road! In bumper to bumper traffic, this could easily cause an accident.

 

[TimothyN]

Sorry, I had forgotten about this thread when I posted...

https://www.mgevs.com/threads/backwards-after-emergency-stop.22629/

 

[Delascas]

So as follow-up on this, I did take my car back to Arnold Clark in Edinburgh and demonstrated this to the service manager. He took video both inside and outside of the car. The next day he confirmed their dealer demo also does this . . so clearly it's a universal issue. I also opened a case with the DVLA.

More people need to raise a fuss on this. It WILL cause a fender bender one of these days.

 

[TimothyN]

How do you raise a case with DVLA? Or can I be tagged onto yours? My video evidence is "real life". Shame I don't have a rear camera as there was someone right behind me.

 

[SimmonAU]

I noticed it happening with mine in Australia as well and now I'm concerned. It freaked me out the first time and I thought I was imagining it.

 

[decrep]

I think it's a software issue and all MG4s do it.
Probably the use of the brake doesn't get communicated properly to the regen control, which is still trying to stop the car going forward. With no forward motion, this drives the car backwards.

 

[Delascas]

In the UK, please report it to the DVSA here:

Vehicle recalls and faults

What to do if your vehicle, vehicle part or accessory is recalled, has a registered fault and how to report serious safety defect you find

www.gov.uk

I will warn you . . . even though they are the DVSA, they seem incapable of looking up a reg number to get a VIN . . so you will need the VIN to report it. AND they won't take you seriously until/unless you take it back to the dealer and tell them about it.