MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: andyiseddy02 on February 28, 2021, 06:33:24 am

Title: What does this code stand for.
Post by: andyiseddy02 on February 28, 2021, 06:33:24 am
Had my BWA engined car in for a health check and they noted
Bfs due 4%. (£65).

Any ideas what it means.
Title: Re: What does this code stand for.
Post by: fakie1977 on February 28, 2021, 07:54:40 am
Could you not ask the garage?


Sent from my iPhone using Tapatalk
Title: Re: What does this code stand for.
Post by: Jons1001 on February 28, 2021, 09:43:33 am
Quote from: fakie1977 on February 28, 2021, 07:54:40 am
Could you not ask the garage?


Sent from my iPhone using Tapatalk

This. You would expect them to run through this when you picked the car up so just ring and ask them? And post the answer on here because I haven't got a clue  :grin:
Title: Re: What does this code stand for.
Post by: andyiseddy02 on February 28, 2021, 12:42:18 pm
I have been working through a list of little issues that they flagged up. Trying to prioritises them.
The problem I have is that I can't have my phone with me during the day so ringing them is a problem. I sent them an email but no reply.

The research I have been doing leads me to a carbon solenoid control valve. Easy fix just need to know if it the right thing.
Title: Re: What does this code stand for.
Post by: andyiseddy02 on February 28, 2021, 01:55:01 pm
Brake fluid service.
Title: Re: What does this code stand for.
Post by: Jons1001 on February 28, 2021, 02:21:16 pm
Quote from: andyiseddy02 on February 28, 2021, 01:55:01 pm
Brake fluid service.

Brake fluid did cross my mind but why the 4% next to it?
Title: Re: What does this code stand for.
Post by: rich83 on February 28, 2021, 02:41:51 pm
Quote from: Jons1001 on February 28, 2021, 02:21:16 pm
Quote from: andyiseddy02 on February 28, 2021, 01:55:01 pm
Brake fluid service.

Brake fluid did cross my mind but why the 4% next to it?

Probably 4% water in the tested brake fluid
Title: Re: What does this code stand for.
Post by: LC5F on February 28, 2021, 02:48:50 pm
Brake fluid is hygroscopic, suspect the 4% is how much water it has absorbed.
Ideally brake rake fluid should be replaced every 2 years - from the americanese definition below it sounds like yours is saturated:

"When the brake fluid becomes saturated with water (3.7 percent by volume), that water can boil in the lines and produce steam (the gaseous form of water). Unlike a liquid, a gas is highly compressible. To some this up, when a compressible substance (steam) is introduced into a hydraulic system  (the brakes), that system can no longer function and the pedal will likely go to the floor –not good! Replacing the fluid before it becomes saturated with water (which we will touch on later) is the key to maintaining the dry boiling point."
https://www.turnology.com/tech-stories/brake-fluid-need-know/ (https://www.turnology.com/tech-stories/brake-fluid-need-know/)