A pair of yellow warning lights

parabolica · Post by **parabolica** » Thu Jul 25, 2019 12:55 am

sw4nny wrote: ↑Thu Jul 25, 2019 12:19 am
buzyg wrote: ↑Wed Jul 24, 2019 11:43 pm
chuckmiester wrote: ↑Wed Jul 24, 2019 10:09 pm Problem solved. It was one of the pressure sensors on the master cylinder. I got a pair off eBay for under £20.
Fitted it tonight, went a short run in it, pulled up, turned ignition on and of and the lights were gone
Result.
Is there a good how to do this anywhere with pics.? I have the same issue thanks

I put a few pics up on PistonHeads a few months back:

https://www.pistonheads.com/gassing/top ... &t=1813208

sw4nny · Post by **sw4nny** » Thu Jul 25, 2019 2:05 am

Cheers, will do a bit more research as I am no brilliant spanner man,but don’t mind getting my hands dirty.

brillomaster · Post by **brillomaster** » Thu Jul 25, 2019 12:52 pm

having just done the job, its a 27mm spanner you'll be needing, or, I found a 27mm impact socket fit over the entire sensor, and then a ratchet spanner to unscrew it.

expect some brake fluid leakage, make sure you have the replacement sensor ready to screw in as soon as the old one is out. also, gloves is a good shout, as brake fluid isn't the nicest stuff to get on your hands.

chuckmiester · Post by **chuckmiester** » Thu Jul 25, 2019 1:47 pm

sw4nny wrote: ↑Thu Jul 25, 2019 2:05 am Cheers, will do a bit more research as I am no brilliant spanner man,but don’t mind getting my hands dirty.

Really easy to do. Only took a minute and that’s with my 2 year old son helping

sw4nny · Post by **sw4nny** » Thu Jul 25, 2019 7:28 pm

chuckmiester wrote: ↑Thu Jul 25, 2019 1:47 pm
sw4nny wrote: ↑Thu Jul 25, 2019 2:05 am Cheers, will do a bit more research as I am no brilliant spanner man,but don’t mind getting my hands dirty.
Is there anything critical I need to do or watch out for either prior or whilst doing this fix?
Really easy to do. Only took a minute and that’s with my 2 year old son helping

ph001 · Post by **ph001** » Thu Jul 25, 2019 9:04 pm

Make sure the brake fluid reservoir is fully topped up and keep the cap on. Few paper towels below the sensors and just work as quickly as you can. You don’t lose a great deal of fluid to be honest.

sw4nny · Post by **sw4nny** » Thu Jul 25, 2019 9:40 pm

brillomaster · Post by **brillomaster** » Sun Jul 28, 2019 9:51 pm

Yep after a thorough test today i can confirm these warning lights are gone! Only one more warning light to go, and christmas is finally over!

sw4nny · Post by **sw4nny** » Mon Jul 29, 2019 2:20 pm

I have just changed both pressure sensors and both my lights are now gone

Thanks for all the information guys

thespannerman · Post by **thespannerman** » Wed Jun 23, 2021 4:50 pm

Guys, had my Z4 for 2 weeks and today it’s chucked up these same two warning lights, which reading the manual seem to imply a fault. The eBay link given above doesn’t work anymore so can someone point me in the direction of these sensors you mention.

A pic or diag or instructions on changing them and where there fit would be helpfully too, sorry, just noticed the link to pistonheads site. Will try and source a couple of these sensors.

Cheers
Al

thespannerman · Post by **thespannerman** » Fri Jul 02, 2021 5:11 pm

Changed both with a couple off ebay, £22.50 for both, lights now off

Thanks
Al

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