Sudden acceleration

[Ian Key]

Unfortunately I think MG will ask why if you have a safety concern with the car why haven't you had the dealer look at it 8 months ago before you had an accident?

 

[Chrisdriving]

Brake will over ride accelerator, this is a requirement( brake pedal over ride) my carpet jammed my X Power accelerator to the floor as i full bored it in sport mode along a dual carriageway joining lane, i lifted off as i was gaining on a car rather rapidly and nothing happened, hit the brake and car reacted as expected, car overtaking me cleared so i pulled out and released brake and car accelerated like a banshee again, then accelerator released itself and all was good but you could easlily bring car to a stop in this scenario using brake and ‘N’ .
Tested it on other EV’s since, pressing brake with accelerator also pressed will slow the car as it should.

 

[Rolfe]

It's possible, if the whole thing was inadvertent, that he was pressing harder on the accelerator and not so hard on the brake.

 

[Kithmo]

Well, that's an experiment we can all try on a quiet road and report back on. Knew there would be a use for a redundant left foot?

It's a poor setup. It should be like the 2016 Prius I had, which used to kill the power to the accelerator when you pressed the brake.

Brake will over ride accelerator, this is a requirement( brake pedal over ride) my carpet jammed my X Power accelerator to the floor as i full bored it in sport mode along a dual carriageway joining lane, i lifted off as i was gaining on a car rather rapidly and nothing happened, hit the brake and car reacted as expected, car overtaking me cleared so i pulled out and released brake and car accelerated like a banshee again, then accelerator released itself and all was good but you could easlily bring car to a stop in this scenario using brake and ‘N’ .
Tested it on other EV’s since, pressing brake with accelerator also pressed will slow the car as it should.

That's the power of the brakes working, it doesn't override electronically and kill the power to the motor.

 

[Chrisdriving]

Trust me, i know what 435bhp going to all 4 wheels feels like, the lightest touch of the brake kills it and cuts the power.
Also look at the power meter, it cuts.
A light brake press on an X Power with accelerator to the floor is not going to achieve much.

 

[Kithmo]

Trust me, i know what 435bhp going to all 4 wheels feels like, the lightest touch of the brake kills it and cuts the power.
Also look at the power meter, it cuts.
A light brake press on an X Power with accelerator to the floor is not going to achieve much.

My 23 reg Trophy doesn't cut the power, the ZS I had before it didn't either.
With the accelerator floored and the brake pressed, the power meter on my infotainment screen shows power flowing to the rear wheels and the power meter on the driver's screen shows 65% power. The car doesn't move though with the brake pressed hard, it does when the brake is pressed lightly, which is what first led me to believe the brake doesn't cut the power.

 

[Chrisdriving]

Weird, mine does as does my Leaf and Tesla did.

 

[mg4mc]

Mine cuts the power too.

 

[Kithmo]

Mine cuts the power too.

Trophy ?

 

[mg4mc]

Trophy ?

Yes

 

[Kithmo]

Yes

Is yours a later one ? Mine is a 23 reg early one.

 

[mg4mc]

Is yours a later one ? Mine is a 23 reg early one.

It was bought in March '23

 

[neeti]

Sudden acceleration MG ZS Trophy 24 - noticed 3 or 4 times since Sept 24. After taking foot off the accelerator anticipating turning the car has accelerated suddenly for a second. Was going to mention when car serviced. On Thursday I was slowly pulling up behind a car outside house when the car suddenly lurched forward, immediately swerved to avoid but hit the offside, careered off and stopped. Grandaughter in back of car, I was so shocked. Other car is a write-off and waiting to hear back from repair garage on the state of our car, it was a mess. I will be contacting the garage we bought from (it was new), concern that there may not be enough for MG to comment on. You start to doubt yourself, maybe it was me but how to prove it wasn't ?

MG tell me they have had no other cases, but clearly they have....has it been reported?

 

[Rolfe]

They said they'd had no complaints about the LKA either.

 

[Tig170]

I'm sure this has been mentioned earlier in the thread, but the biggest cause of this is poorly fitting car mats, I've had this in mine, and most of my family members have had this also (from getting stuck around the steering column shaft to stuck over the accelerator) - car mats should only be allowed if the are fixed down to the physical car esp. on auto's.

 

[OriginalBigAl]

I had a unexpected lurch forwards in mine yesterday, but this was definitely user fault.
I was dropping my wife off at the entrance to the garden centre before finding a parking place, I engaged auto brake via the brake pedal whilst my wife got out, after a short conversation she shut the door and I went to move off. Distracted I thought I had engaged P so pressed the brake pedal briefly to engage D , and you've guessed it the auto brake disengaged and off we went whilst my hand was reaching down to the control knob. Distraction, tiredness, and bad timing, it only moved about a foot forwards before I caught it on the brake , it would have been only to easy to hit the "wrong " pedal to make the surprising situation more serious.

 

[Anon70]

MG tell me they have had no other cases, but clearly they have.

This is pretty much what EVERY large organisation says, with the worst example being The Post Office Horizon scandal. The corporate rules of engagement are deny, deny, deny until enough people prove you wrong or you get enough press coverage to force the company into a response.

Too many examples of companies of every hue doing this.

 

[securespark]

Would having a third pedal in EVs help those ex-manual gearbox drivers?

Not a clutch, but a foot pedal that knocks the 'box into neutral?

 

[Edd Beesley]

Sudden acceleration MG ZS Trophy 24 - noticed 3 or 4 times since Sept 24. After taking foot off the accelerator anticipating turning the car has accelerated suddenly for a second. Was going to mention when car serviced. On Thursday I was slowly pulling up behind a car outside house when the car suddenly lurched forward, immediately swerved to avoid but hit the offside, careered off and stopped. Grandaughter in back of car, I was so shocked. Other car is a write-off and waiting to hear back from repair garage on the state of our car, it was a mess. I will be contacting the garage we bought from (it was new), concern that there may not be enough for MG to comment on. You start to doubt yourself, maybe it was me but how to prove it wasn't ?

The most likely explanation is that your foot was on the accelerator, not the brake, and you were pressing it very lightly and regen was slowing you down - your brain accepts you must be pressing the brake because you are slowing down. Now you want to stop so you push a bit harder, and the car transitions from regen to accelerating, and you panic and push what you think is the brake harder, you speed up a lot and crash.

 

[neeti]

Yes, with current evidence, it may be the most likely explanation but not the ONLY explanation.