Electronic Brake failure

Electronic Brake failure

Author
Discussion

pvcpro73

Original Poster:

12 posts

77 months

Thursday 28th July 2022
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Hello,

Just wondering if anyone can offer some advice please?
My wife went to start the car this morning and there was a loud screeching noise, then a yellow symbol lit up with a message saying parking brake failure, the car won't drive and feels as if it's stuck in parking brake mode.

Garage can't look at it until Tuesday and would be charging us to come and collect it so just thought I'd ask here to see if there's anything I could possibly do before then, I'm suspicious that it's something to do with battery power because recently there has been messages appearing saying increased battery discharge, also for some reason the lights switch themselves on to full beam, it's a dial to the right of the steering wheel and quite often we will notice it has turned clockwise to full beam and it's definitely not us turning it.

Thanks

Blib

45,435 posts

204 months

Thursday 28th July 2022
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Make & model?

pvcpro73

Original Poster:

12 posts

77 months

Thursday 28th July 2022
quotequote all
Oops sorry, BMW X6

Caddyshack

11,838 posts

213 months

Thursday 28th July 2022
quotequote all
Sounds haunted.


Maybe try charging the battery.

Most batteries fail around 5 yrs ime. Some bmw service plans and warranties cover the battery but if after a good charge it works then I would replace.

LordHaveMurci

12,099 posts

176 months

Thursday 28th July 2022
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Can’t help but impressive lurking OP!

pvcpro73

Original Poster:

12 posts

77 months

Friday 29th July 2022
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The engine does actually start so do you think I should leave it running for a while to see if it recharges the battery a bit?

pvcpro73

Original Poster:

12 posts

77 months

Friday 29th July 2022
quotequote all
The engine does actually start so do you think I should leave it running for a while to see if it recharges the battery a bit?

Funk

26,573 posts

216 months

Friday 29th July 2022
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Low batteries can do weird things to BMWs so it can't hurt to let it charge for a bit (assuming it is/can).

Never heard of them turning on their own headlights on the dual though, that's odd.

GreenV8S

30,481 posts

291 months

Friday 29th July 2022
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The unrelated nature of those symptoms makes me wonder whether you're got a dodgy earth somewhere that is causing false triggers on digital switches. It might upset the charging circuit too.

Order66

6,739 posts

256 months

Friday 29th July 2022
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Sounds like either the motor that actuates the handbrake has failed or the cables have seized. I believe there is an emergency release, but its also not unknown that you need to cut the cables to get the brakes to release.

Try this: https://www.youtube.com/watch?v=ic8C5lA2Qgk

shakindog

498 posts

157 months

Saturday 30th July 2022
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Remove trim in boot on near side you see a metal ball type thing.
In the tool kit for car is a plastic T shaped thing I believe it’s red.
one end fits over the ball and pull upwards like your life depends on it the handbrake will release. Drive to garage save recovery fees.
Make sure cars in park so doesn’t roll away.
The square end on the t handle is to release the gear box out of park when and if it does a poo.
But that’s a whole other head ache

tapkaJohnD

1,993 posts

211 months

Saturday 30th July 2022
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BMW, eh?

Citroen do a electronic hand brake on the C5. The owners manual includes instruction on how to release it manually, by a lever built into the bottom of the central elbow rest.
Sounds as if BMW didn't think of this early enough in the design stage!

John

pvcpro73

Original Poster:

12 posts

77 months

Saturday 30th July 2022
quotequote all
There is a section in the handbook on releasing the handbrake, It says to use a screwdriver to pull up on the steel wire loop in the boot, I tried it but nothing happened

pvcpro73

Original Poster:

12 posts

77 months

Saturday 30th July 2022
quotequote all
I just tested the battery with a multimeter and it's at 11.79 v

Is that the problem?

Should I buy a charger and try charging it first before buying a new battery?

Blib

45,435 posts

204 months

Saturday 30th July 2022
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What, if any, are the advantages of an electronic hand brake over a mechanical one?

catfishdb

242 posts

176 months

Saturday 30th July 2022
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Me thinks that the electronic brake is most helpful to the designers of the interiors.
That little switch can go almost anywhere...so doesn't limit or fuss-up the console.


I would also think that because it goes on automatically in some....many....most vehicles??? that it helps with the manufacturers "safety" features. You know....at the board room conference and all.


All of that is fine until it doesn't know that it is not working and applies itself....now your stuck.


Pull hand brakes were somewhat simpler but only if you used them regularly. Get in a car that has never had the hand brake set and activate it for the first time in a long time and it will let you know just how unhappy that little cable all encased in corrosion just is.

Arthur

MitchT

16,230 posts

216 months

Saturday 30th July 2022
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Blib said:
What, if any, are the advantages of an electronic hand brake over a mechanical one?
From the end user's perspective, in my experience, none.

In the case of BMW, and much the same as their electronic steering lock, it's another unnecessary complication, solving a problem that never existed but, from their perspective, creating an opportunity for them to milk money out of you when it goes wrong... which it will.

pvcpro73

Original Poster:

12 posts

77 months

Saturday 30th July 2022
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So do you think I should buy a charger and try charging it first before buying a new battery?
Or just buy a new battery?

andrebar

507 posts

129 months

Saturday 30th July 2022
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pvcpro73 said:
So do you think I should buy a charger and try charging it first before buying a new battery?
Or just buy a new battery?
Check voltage again with the engine running to rule out a charging issue first. If it will charge itself you might not need to worry about the battery

pvcpro73

Original Poster:

12 posts

77 months

Saturday 30th July 2022
quotequote all
Okay so I just fitted a new battery, it's showing 12.47v is that normal for a new battery?

I now have even more error messages showing up!