Boot not opening / steering ESP light

[harshal]

I was tightening the t bolt on the battery yesterday and over tighten my mistake and snap the top head off.. then after doing all that closed the boot .. realised a moment later F!.
Lucky the z4s have a positive terminal in the bonnet, hooked up leads and managed to get it opened. Added a new t bolt on the terminal all plugged and started working... Moments later saw steering wheel symbol pop up.. google said power steering but it seems fine weirdly not heavy when standstill... drove for abit and the symbol still remains. So im not sure what else to do, ive plugged in a OBD and used the bimmerlink app to clear but no luck..

Later on in the day noticed the boot won't open! Tried it on the fob and dash button no luck.. the roof opens and closed without a issue.. while it was open thought id quickly have a look in the boot couldn't see anything wrong.. I clicked the lock and unlock on th3 fob I can hear the mechanism on the driver side in the boot but nothing further towards the actual lock part where the boot handle to open is on the outside.

Little stuck now lol , are there any BMW guys that can help even somewhere to go locally im based in London,

Thanks

 

[TriggerFish]

For the steering, try:

Try recalibrating. Start car. Go full lock left and hold firmly 10 sec, then full right and hold 10 sec, then return to middle.

 

[harshal]

Thanks mate, I did try that still no luck with the power steering message

 

[harshal]

Attached a pic of what bimmerlinks reader says

 

[B21]

Power steering can fail when the battery goes Pete Tong…usually it’s the onboard ECU

 

[harshal]

It was off the battery for 24hours as I needed to get a new T Bolt.. battery health looks good though attached a pic .. maybe it needs a hard reset to clear.

On another note i do want the boot to open .. if any BMW guys are local to me let me know please happy to pay for any work needing

 

[harshal]

Found this link on youtube,



il see if using the positive terminal under the front bonnet will give it enough power to open the boot.. as when I press the open boot on the fob you can hear the unlocking noise faintly.. so I wonder if its to do with power.