Loss of power on a left turn.

[deltasierra]

It could be an intermittent electrical connection if the wiring is able to move in a turn, much more likely is a fuel pickup problem in the tank, either object moving around or a detached pipe.

[Pondrew]

I hate cars lol

They are great when they work; PITA when they don't. Could be worse, though. You could have bought a Mini.

[Marty65]

Don't go there. I did about 10 years ago. It lasted 3 months and got the boot

[smorris_12]

When you turn the DSC off, are you doing the full-fat 10second press and getting 3 lights up? Otherwise you're only really disabling the traction control.

Start by reseting the tyre pressure monitoring system (and even check the pressures if you like!) as it could be marginal on whinging that a tyre is flat but the rolling radius could be enough to throw the DSC into intervening.

If it's not that it's a tyre issue. I used to get this problem on my 320d at one point when I had notably different tyre makes front to back and also one end was quite new where the other was mostly worn. The DSC is looking at the tyre rotational speeds and, within limits for a given steering input, it knows what ratio of speed differences it can allow. Beyond that it assumes a tyre is slipping. Have a setup where going in a straight line is already giving quite disparate speeds and, on cornering, it looks more like slippage. The effect is exaserbated by staggered setups as they're already likely to be not quite equal circumference front to back. And different makes make different diameter tyres no matter what it says on the side!

Regarding only doing it going left, it could be one tyre is lower tread than its oppo or just the difference in where the weight is located (BMWs are right side heavy in the UK, in LHD-land the battery compensates for the driver a bit) throwing the system.

[enuff_zed]

When you turn the DSC off, are you doing the full-fat 10second press and getting 3 lights up? Otherwise you're only really disabling the traction control.

Start by reseting the tyre pressure monitoring system (and even check the pressures if you like!) as it could be marginal on whinging that a tyre is flat but the rolling radius could be enough to throw the DSC into intervening.

If it's not that it's a tyre issue. I used to get this problem on my 320d at one point when I had notably different tyre makes front to back and also one end was quite new where the other was mostly worn. The DSC is looking at the tyre rotational speeds and, within limits for a given steering input, it knows what ratio of speed differences it can allow. Beyond that it assumes a tyre is slipping. Have a setup where going in a straight line is already giving quite disparate speeds and, on cornering, it looks more like slippage. The effect is exaserbated by staggered setups as they're already likely to be not quite equal circumference front to back. And different makes make different diameter tyres no matter what it says on the side!

Regarding only doing it going left, it could be one tyre is lower tread than its oppo or just the difference in where the weight is located (BMWs are right side heavy in the UK, in LHD-land the battery compensates for the driver a bit) throwing the system.

Oh yes, that's a thought.
If you have staggered wheel sizes check the correct ones are on front and back too.

[Marty65]

I've been doing the semi-skimmed push. Just the amber DTC on the dash. Didn't know about the 10 sec push. Every day is a school day!
I'll give it a go and fingers crossed.
Your input is very much appreciated