» Site Navigation | | » Recent Threads | looove 04-16-2024 01:18 PM 04-16-2024 01:18 PM 0 Replies, 536 Views | | lolita porn 04-13-2024 11:45 PM 04-13-2024 11:45 PM 0 Replies, 229 Views | lolita porn 04-13-2024 11:43 PM 04-13-2024 11:44 PM 1 Replies, 146 Views | lolita porn 04-13-2024 11:40 PM 04-13-2024 11:41 PM 1 Replies, 156 Views | lolita porn 04-13-2024 11:38 PM 04-13-2024 11:39 PM 1 Replies, 161 Views | lolita porn 04-13-2024 11:36 PM 04-13-2024 11:37 PM 1 Replies, 156 Views | lolita porn 04-13-2024 11:35 PM 04-13-2024 11:35 PM 0 Replies, 137 Views | lolita porn 04-13-2024 11:34 PM 04-13-2024 11:34 PM 0 Replies, 140 Views | lolita porn 04-13-2024 11:33 PM 04-13-2024 11:33 PM 0 Replies, 137 Views | | | | | 02-05-2016, 12:13 AM | #1 | Member Join Date: Sep 2015 Location: Columbus, OH Posts: 91 | Brake Pad Warning Light So, my brake pad warning light came on this morning. I never heard of a warning light for brake wear, nice! My question is, how much pad is left when the light comes on? In other words, how urgently do I need to get this done? __________________ salguod 2007 Toyota Prius Touring 2005 Mazda3 S 5 Door 1998 Ford Escort SE 1996 BMW 318ti 1960 Ford Thunderbird Convertible | | | 02-05-2016, 01:04 AM | #2 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | Quote: Originally Posted by salguod So, my brake pad warning light came on this morning. I never heard of a warning light for brake wear, nice! My question is, how much pad is left when the light comes on? In other words, how urgently do I need to get this done? | #soon I'd suggest replacing your rotors as well. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 02-05-2016, 03:45 AM | #3 | Senior Member Join Date: Dec 2011 Location: Santa Rosa, CA Posts: 407 | Also a note, you'll need to replace the brake pad sensors as well. Once they go off they can't be reused. __________________ 1997 318ti 5-speed Moreagrün 1996 318ti auto Hellrot (retired) | | | 02-05-2016, 04:40 AM | #4 | Member Join Date: Sep 2015 Location: Columbus, OH Posts: 91 | Anyone have anything more definite than "soon"? :-D There wasn't anything better in either the owner's manual or the Bentley, but I was hoping someone might have an idea from having changed theirs. I also assume there's no way to tell if it's the front or rear without pulling the wheels either. __________________ salguod 2007 Toyota Prius Touring 2005 Mazda3 S 5 Door 1998 Ford Escort SE 1996 BMW 318ti 1960 Ford Thunderbird Convertible | | | 02-05-2016, 03:12 PM | #5 | Member Join Date: Oct 2015 Location: Slidell, Louisiana USA Posts: 89 | I had to change my front brakes when I bought the car. I was changing struts and noticed the pads were down to 2-3mm. My light was not on, though. I would assume yours are thinner than 2mm. That's quite thin. | | | 02-05-2016, 04:00 PM | #6 | Member Join Date: Sep 2015 Location: Columbus, OH Posts: 91 | 2mm is very thin, but a good use of all my pad material. I tried to check through the wheel spokes when I got to work and both looked about 1/4", but it was still not quite light out and hard to see. I'll have to go out at lunch and check. The light seems to flicker when driving on the highway and goes out with the brakes applied at a stop. Given that the sensor, I think, it just a wire that gets broken by wearing on the rotor, breaking the circuit, that makes sense because the rotor would complete the circuit when stopped. __________________ salguod 2007 Toyota Prius Touring 2005 Mazda3 S 5 Door 1998 Ford Escort SE 1996 BMW 318ti 1960 Ford Thunderbird Convertible | | | 02-05-2016, 05:30 PM | #7 | Member Join Date: Oct 2015 Location: Slidell, Louisiana USA Posts: 89 | I believe it's a single wire sensor that gets a ground when it touches the rotor. | | | 02-05-2016, 06:42 PM | #8 | Senior Member Join Date: Jan 2012 Location: SF Bay Area Posts: 315 | Quote: Originally Posted by bluoval6 I believe it's a single wire sensor that gets a ground when it touches the rotor. | No, it is a two wire sensor that breaks. With the light coming and going, you may actually just have a bad wire and the sensor hasn't actually gone of yet. When the sensor is to the point that it sets the light, it doesn't come and go. If it is actually gone, I'd recommend to replace the pads and rotors as soon as possible and not chance beyond 500 or so miles. I cannot say 500 miles is a definite as I do not know your driving and braking habits, so you are better off with "SOON". __________________ 01 740iS Cosmos Black 97 318ti Boston Green 99 318ti Titanium Silver 13 X5 3.5XDrive Cosmos Black 97 318ti Alpine White (gone but not forgotten) 88 325iC Schwartz Black (sold) 97 740iL Schwartz Black (sold) 84 633csi Schwartz Black (sold) 96 318ti Alaska Blue (sold) 08 X5 4.8i Titanium Silver (sold) | | | 02-05-2016, 10:44 PM | #9 | Member Join Date: Oct 2015 Location: Slidell, Louisiana USA Posts: 89 | Quote: Originally Posted by 740isport No, it is a two wire sensor that breaks. | I stand corrected. Thank you. | | | 02-06-2016, 05:10 AM | #10 | Senior Member Join Date: Oct 2008 Location: Los Angeles, CA Posts: 1,464 | Quote: Originally Posted by salguod 2mm is very thin, but a good use of all my pad material. | The problem with this logic is that the thinner the pad gets, the less effective it becomes (dangerous), the less able it is to dissipate heat (dangerous) and therefore, the more likely you are to warp your rotors (^ $$$). If your ti still has the solid front rotors, you're going to want to replace them anyway (as Steven previously mentioned). Quote: Originally Posted by salguod The light seems to flicker when driving on the highway and goes out with the brakes applied at a stop. | This is normal for when the sensor is just beginning to activate. As you continue to wear the pad down, the light will eventually stay on continuously. IIRC, a new pad is approximately 10mm and the wear indicator usually begins to activate at about 4-5mm. While that sounds like you still have close to 50% pad when the indicator activates, see my first response as to why it's not the best idea to keep wearing the pads down. __________________ 1995 318ti Base - Cosmosschwarz/Sandgrau R.I.P. 1997 318ti Active - Alpinweiß III/Sandgrau 2013 328i Coupe - Le Mans Blau | | | 02-06-2016, 01:35 PM | #11 | Member Join Date: Sep 2015 Location: Columbus, OH Posts: 91 | Looking through the wheels yesterday, I'd guess the rears have 5mm + left and the fronts 3-4mm, so it's the fronts that need replacement. I haven't pulled a wheel to check the inners. That's the first I've heard about not letting the pads wear thin to prevent rotor warp, I'll have to look into that. I always wait until about 1.5-2mm to change my pads and haven't had issues with warped rotors. As I recall, that's been the service limit on a couple of cars I've had, I haven't seen a service limit spec on these. The only warped rotors I can remember is my Mazda3 and those were the factory rotors with probably 150K on them. Sent from my SM-T320 using Tapatalk __________________ salguod 2007 Toyota Prius Touring 2005 Mazda3 S 5 Door 1998 Ford Escort SE 1996 BMW 318ti 1960 Ford Thunderbird Convertible | | | 02-06-2016, 05:31 PM | #12 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | Brake pads wear out exponentially. That is to say, using made up numbers... If you normally get 10K miles on 10mm of pad, that doesn't mean you have 5K miles left on 5mm. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | 02-08-2016, 03:21 PM | #13 | Member Join Date: Oct 2015 Location: Slidell, Louisiana USA Posts: 89 | I bet the inner pads are thinner than the outers. The sensor is on the left inner pad, at least on my ti. It's typical with most cars for the inner pads to wear a bit faster. | | | 02-23-2016, 03:04 AM | #14 | Member Join Date: Sep 2015 Location: Columbus, OH Posts: 91 | So this weekend I pulled the wheels and took a look. The passenger side has good pad left inside and out, plenty of life left there, easily 4mm. The driver's side outer looks good as well, 3-4mm. Driver's inner, where the sensor is, has worn quite a bit and unevenly. The lower is probably only 1-2mm, the top is 3-4mm. I'm thinking that I have a sticking guide pin causing it to wear unevenly. Are the guide pins or bushings easy to change or do I need to buy a full caliper or the carrier bracket? __________________ salguod 2007 Toyota Prius Touring 2005 Mazda3 S 5 Door 1998 Ford Escort SE 1996 BMW 318ti 1960 Ford Thunderbird Convertible | | | 02-23-2016, 04:21 AM | #15 | Senior Member Join Date: Jun 2003 Location: Greenville, SC Posts: 9,356 | Quote: Originally Posted by salguod So this weekend I pulled the wheels and took a look. The passenger side has good pad left inside and out, plenty of life left there, easily 4mm. The driver's side outer looks good as well, 3-4mm. Driver's inner, where the sensor is, has worn quite a bit and unevenly. The lower is probably only 1-2mm, the top is 3-4mm. I'm thinking that I have a sticking guide pin causing it to wear unevenly. Are the guide pins or bushings easy to change or do I need to buy a full caliper or the carrier bracket? | No need to replace the guide pins or bushings. I'd be surprised of there was something wrong. Could just be dirty. The bolts holding the caliper bracket can be a bare to remove. I use PB Blaster and walk away for 20 minutes. Guide pins should come right out. Probably a good idea to replace the bushings every once in a while but only if the guide pin isn't moving freely. __________________ ...steven BMW CCA #146825 1996 BMW 328ti • 2003 MINI Cooper S • 2016 M235i www.bmwcca.org | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |