Thanks a lot! I hit a curb and side airbag deployed. Stood there with my hazards and considered calling a tow truck because the car wouldn’t start. Then remembered RU-vid is a gold mine so tried my luck there at the side of the road and yeah, that saved me a lot of money. Cheers man!
Wow, thanks for sharing your story! I think it's great that you found the video and it got you going again! Also, good working getting it done there and then on the roadside! ☺ Glad the video helped you! 👍
Of the number of RU-vid videos around the BMW BST this video is far and away the best at explaining the issue and the repair. Nice work. If you have not I would suggest adding Mini to your keywords in the video. I had to replace the BST in my first 2006 R53 Mini Cooper S. I searched and struggled at the time (2019) for information. This video would have saved me time and money.
Thanks very much for your comments! I’ll check the tags and description as you suggest, maybe some Mini owners will find the video and it will help them! 👍
Any advice on how to pry the cable out of the bat on the replacement? Found on I tripped at the junkyard but can’t get the old cable out to connect mine!
Hi, to separate the two parts of the cable at the BST, you have to pry open the black plastic housing (which I assume you've done already) and then you need to lever the two sections apart. 04:45 in the video shows this, you may need to lever at different positions all around the edges. I kept the original positive cable from the BST to the car and just replaced the clamp and BST part where it goes onto the battery. Hope that helps! Cheers, Phil
Hi pal thank you for the great video. I had a small accident yesteray to the front drivers side. After this i was able to start up the car again and get home, but the next day it doesnt want to start. Could replacing this resolve the issue?
That's a strange one because if the BST has blown, normally the car won't start at all. However, it would be the first thing that I would check! I would defo do the check that I show at 1:21 in the vid! Thanks, Phil
Sorry, I’ve never heard of that issue! But, if the check engine light is on, there must be a code. First step will be reading the code to see what the ECU is saying the problem is. If you don’t have one already, I recommend a C110+ (for BMW), you can find them on Amazon, eBay etc. thanks, Phil
Can the terminals in the boot floor were the bst cable and the other positive cable bolt to be replaced could i ask ur advice wat are those terminals called thank would apreciate any help great wee video
Hi David, sorry, I had a look but couldn’t find what they are called. I checked the parts diagrams on “RealOEM” too and couldn’t find it. You might need to post the question on an enthusiasts forum. Thanks, Phil
Hi @romero10374 In theory, the event that triggered your BST was a one off event (impact) that was detected by the sensors. Therefore, you should be ok to fit a new BST and it will only trigger again if there is another "event", so yes, you should be ok to do this. Note that I said should a few times, I've never tried this! 😀 Later on, if you decide to do some repairs (hammering, removing panels etc), it's a good idea to disconnect the battery to prevent a false trigger. Hope this helps. Thanks, Phil
I bought a 2008 bmw 650i and it didn’t come with the sensor’ I try to replace the cables with new sensor but wasn’t the same ‘ I looked to some other videos and I can’t see to find if my car has a sensor or not can u pls help me ‘
Hi, I would have thought that your car would have a battery safety terminal as standard but if it doesn’t, I don’t think it is a big problem. The video is aimed at people that do have a BST and it is preventing their car from operating properly. If your car starts and runs ok, I’m not sure I would try to retrofit a BST into it. Hope that helps. Thanks, Phil
good night I saw your video and I did the same I bought the used Ibay cable, I installed it in the same way as you indicate. but I put the scanner in and it deletes the witness but it immediately turns on again at the time of sending the cooper what am I doing wrong I need help you could remove the witness What I can do? thanks for your videos all the best jaime perez
Hi, By "witness" I think you mean the fault code? And your problem is that it won't clear even after you fix the BST. First, please double check that the fault code you are trying to clear is for the BST, it should say something like "Safety Battery Terminal" and not some other problem on the car. If your fault code is for the safety battery terminal and it won't clear, even with a new BST installed, then the most likely cause is that the wiring is different on the connector as shown at 05:02 in the video or it isn't plugged in properly. btw, here is a video on how to clear the fault if it helps you: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Fkon2rxijs0.html Hope that helps! Thanks, Phil
@@ReviveMyRide Good afternoon Thank you very much for answering If it is a battery failure And if it was changed and the airbag warning light is not removed I will check everything again and connections I hope it can be resolved I inform you Again, thank you very much my best wishes James
good thank you very much Well, I cleaned everything, corrected things 3 times and the code is not deleted. I think the cable I bought doesn't work I will keep trying to solve it thank you so much my best wishes
What did u mean at the end the risk of blowing it if u air bag light is on while u replaced it... should i clear the code and then shut the car off disconnect and replace?
Yes, I think it's important to make sure that the original trigger resolved and cleared. So, for example, if you had a minor bump and it blew the BST (or triggered and airbag), check the fault codes with a decent OBD scanner to make sure the original fault is cleared. Of course, the BST itself won't clear until you replace it but there shouldn't be anything else showing on the SRS system. This isn't a huge risk as normally airbag & bst triggering is a momentary detection (that isn't permanent) from the sensors. Hope that helps! Thanks, Phil
If you replace the BST and the car still has persistent airbag light on due to being in accident, will the BST blow again? Or do you have to fix all the airbags before you can replace BST?
Hi that’s a good question! In my situation, the car had been all fixed and I just had the BST to do. In theory, it is the “trigger” of the event that sets off the airbag & BST not the airbag light / fault code. So, as long as you don’t get another trigger event, then you should be ok to replace the BST even if the airbag light is ok. However, please get a second opinion, as I haven’t had the exact situation your described, any friendly car body shop should be able to answer. Thanks, Phil
Hello, thanks for all these info ! I've 15 320i been in front end collision airbags lights are on and a drivetrain malfunction error with code P15ED, do you think I've to replace the bst ?
Hi, there's a good chance that it will have triggered but here's how to be 100% 1) Symptoms: Normally, if this has happened, the ignition will turn on but the car won't start, even if the battery is fully charged. 2) Check out the video again at 01:22 it is possible to check visually and by wiggling the positive battery cable if the BST has blown. Hope this helps! If you have other questions, please ask, I'll help if I can! 👍
@@idrischabat5234 hi, it sound like your car has a slightly different type to mine but the purpose of the device is to cut electrical power to the engine in the event of an accident. As the car still starts ok, it looks like your BST is ok. Only going on my own experience where my car refused to start after an accident due to the BST triggering. Thanks, Phil
Yeah, there are a lot of slight differences across the BMW models and years of manufacture. I think the basic principle stays the same though... Thanks, Phil
Hi, not sure how I showed it in the video without watching back but I always prefer to disconnect the battery first (usually negative lead first) before unplugging an airbag connection. Hope that helps!
@@fedorov5549 Hi, yes, initially as a "temporary fix" I opened up the BST cover (as shown in the video), cleaned up and pushed the battery terminal connections back together again and then drilled a small hole in the metal clamp so that i could put a self tapping screw in to hold it together (although tbh it is a tight fit, so would probably just stay together on its own). And then, as you suggested, I unplugged the airbag wire. However please note: Your entire airbag system may not work and in the event of an accident, your battery will not automatically disconnect. I weighed up both of these things but I also have some older cars that don't have airbags or battery disconnects, so I was often driving in exactly this type of circumstance anyway! Just be mindful of other passengers that you may have in the vehicle, you could be comfortable and aware of the risks, but they may / would not be? Hope this helps! Phil
Hey man I have a 2014 bmw 320i and the front charge terminal under the hood that red wire melted and just has the wires exposed and the wires look corroded, I have the money to replace it I just would like to know what is causing it to melt
Hi, sorry for the slow reply! Just away for a cheeky holiday 😉 There are quite a few things that can cause that. No.1 is a poor connection where the red wire is bolted down: if it is loose or if there is any corrosion at all then there can be more electrical resistance, which leads to heat. That is what I would check first. It may not be easy to tell now that it is melted but when fitting the new one, ensure the terminal is super clean and nipped up tight. Worth checking all other electrical mounting points in the area positive and negative (because a poor earth can also cause the problem, even though it isn’t the earth cable that has melted). Hope that helps! Thanks, Phil
My BST cable won't budge I had an accident got hit on the front passenger side of course the bags deployed and all. The car just clicks loudly in fact the click is so loud and strong you can feel it in the car. My starter won't engage.
Hi, can I ask, have you levered the cover off of the BST? Once you have done that, you can usually see two plastic tabs that are preventing you from sliding the cable back into the BST. You can actually lift the end of the cable out past the tabs and then slide it back into its original position. Hope that helps! Thanks, Phil
@@ReviveMyRide Oh I had already got it started since that comment was put up. The cable was loose it's was just very stiff my car can start up again. Thanks for the outstanding video!
@jayserna1989 That's the tricky part! BMW (pretty much in acknowledgment of the issue) sell kits for most of their models but they are expensive! In the video, I try to show you have to get a good result for less money. So what you need to do is take a picture of your BST, then go up to your computer and search for BMW BST / battery safety terminal on Ebay. Sift through the results and look for one that looks like yours. Maybe initially include your exact model in the search, for example: BMW 3 series E46 BST and maybe you''ll get lucky and find one exactly the same as yours. Take note of the small (usually yellow) electrical plug that connects to the BST from your car, these do change in design across models and it is a lot easier if you buy a replacement BST that has the exact same plug. Hope that helps! Thanks, Phil
I'm not 100% sure tbh. Because I had the equipment to do so, I went and cleared the code straight away. Sometimes, just correcting the fault is enough, the item will start working (In this case the BST) and the code will sit in the background unless cleared (which is no big deal). Other times, the code needs to be cleared for the system to start working again. If I was going to guess based on my prior experience, I would say that you need to clear the code. This can easily be done with a BMW specific fault code reader: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Xk5AtAtoV_k.html or with a cable and software on a laptop: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Fkon2rxijs0.html Hope that helps! Phil
can i just get rid of the battery safety terminal cable n just run a cable w no BST?.. almost had a deadly crash when this bst turned my car off at night in a snow storm...this bst is a dangerous component...
Yes, you can just connect direct to the battery. Another downside of the BST is that if you have a minor bump or hit a curb, it can trigger and if you stop the car, it won't start again! A lot of modern cars don't even have a BST but of course, it is a safety feature, so it's down to personal choice.
It is ridiculous that they made this part and didn't care enough to make it something easily replaceable and their replacement bmw sells is clearly an after thought
Yeah, it's crazy isn't it? Towing is really expensive and sometimes a very small bump can render your car undriveable and of course, if you haven't come across the problem before then you've no idea what the issue is! For me, the car was getting towed anyway but then the bodyshop didn't know what the problem was. I had to go fix it myself but by then, they had fitted a new battery, which cost me. They wouldn't acknowledge that the BST had been the problem all along.
