Has anyone had to replace a hard brake line?

Nihilation · 01-04-2017, 10:45 AM

Really had to clamp and grip the hard brake line to loosen and remove the original rubber brake line and marred the hard line a bit in the process. No leaks or anything but makes me question if I should replace it. Looks like a fun job. Anyone here do the same or have other reason to replace a hard line?

doogee · 01-04-2017, 11:53 AM

I had to change the front driver line and both rear hard lines on the subframe.

These new lines BMW has been putting on since the E90 are JUNK.

They're a copper alloy which is great, but corrosion happens between the line and the coating on the line which causes the hard coating to balloon inside the fitting. Then you can't turn it without twisting the entire line rendering it useless and dangerous.

Good news is, replacement lines are cheap from the dealer.

g2 · 01-06-2017, 08:27 AM

I've not on an e92 but on my e30 track rat. For those cars BMW gives you a straight line and you have to bend it. Not exactly what I wanted to do. I went to the yard and got one off a parts car. Blew it out with compressed air and installed. Bled the heck out of it and its been good for years. Bottom line, if BMW has straight lines get one off a parts car.

01-04-2017, 10:45 AM	#1
Nihilation Lieutenant 184 Rep 518 Posts Drives: BMW M3, 328xi AT and 328i 6MT Join Date: Nov 2009 Location: Haymarket, VA iTrader: (1)	Has anyone had to replace a hard brake line? Really had to clamp and grip the hard brake line to loosen and remove the original rubber brake line and marred the hard line a bit in the process. No leaks or anything but makes me question if I should replace it. Looks like a fun job. Anyone here do the same or have other reason to replace a hard line? __________________ 2003 M3 \| SMG \| KW V1 \| Apex ARC-8s \| 3.85 LSD \| Cobra Nogaro \| S2R Tuning Sunroof Delete \| Billy Boat Section 3
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01-04-2017, 11:53 AM	#2
doogee Major 748 Rep 1,256 Posts Drives: '08 M3, '09 328xi Sport Wagon Join Date: Oct 2008 Location: Ancaster, ON, Canada iTrader: (0)	I had to change the front driver line and both rear hard lines on the subframe. These new lines BMW has been putting on since the E90 are JUNK. They're a copper alloy which is great, but corrosion happens between the line and the coating on the line which causes the hard coating to balloon inside the fitting. Then you can't turn it without twisting the entire line rendering it useless and dangerous. Good news is, replacement lines are cheap from the dealer. __________________
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01-06-2017, 08:27 AM	#3
g2 Private First Class 22 Rep 146 Posts Drives: E30 24V Join Date: Oct 2007 Location: Atlanta iTrader: (0)	I've not on an e92 but on my e30 track rat. For those cars BMW gives you a straight line and you have to bend it. Not exactly what I wanted to do. I went to the yard and got one off a parts car. Blew it out with compressed air and installed. Bled the heck out of it and its been good for years. Bottom line, if BMW has straight lines get one off a parts car.
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