The Way To Exchange A Seat Occupancy Sensor

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This challenge has been a very long time coming for me. Almost a year in the past I left my home windows down throughout a pretty impressive thunderstorm (unintentionally pressed the unlock button on my key in my pocket whereas I was walking away from the car and each windows and the sunroof opened), and on account of some moderately drastic measures on my half to dry out the car the one lasting harm was that I now had a seatbelt and airbag warning gentle on my dashboard. I used to be fairly rapidly ready to determine that these lights had been being attributable to a defective passenger occupancy sensor. Sadly, BMW does not sell simply the sensor, but moderately your complete backside seat cushion for a cool $1200. Properly I did not want to do this. So I managed to make it by way of many a month with these annoying warning lights till at some point I occurred upon a list on a salvage automotive parts site that was selling a standalone seat sensor! I snatched up the half after which spent an entire day switching them out. In researching the right way to get into the seats I used to be unable to seek out much of anything helpful on this forum so I figured I ought to write up this DIY to help others out. 1. Remove the seat (duh). You will use the T50 bit to take away all four screws holding the seat down. Once loose, go to the trunk and fliphtml5.com disconnect the battery. Back in the cabin, push the chair back so you can see beneath and disconnect the yellow wiring harness. There's a black tab on the aspect that you would be able to match a small screwdriver in. Pull that tab out so far as it is going to go, then pull out the wiring harness. There is a separate wire connector on high too: squeeze the sides to launch it and disconnect that too. Now pull the seat out of the automobile. This is easier if you additionally take the headrest off. 2. Now you are going to must remove the plastic cowl on the righthand facet of the seat that has the seat controls on it. This piece is held on with 5 plastic tabs: 3 are seen on the bottom of the piece and 2 are hidden inside close to the highest. I used to be in a position to get all however the righthand inside tab utilizing simply my arms. To get that final tab I needed to bend a hook form into a chunk of thick wire and fish that via to the tab and pull the tab while pulling up on the entire piece. That was troublesome. As soon as off, you may see easy methods to controls are wired up, simply unplug them so you'll be able to take away the trim totally. 3. As soon as the outer plastic trim is off, you may be confronted with a second plastic piece. To take away this there's just one bolt (T30) and you then simply must wiggle it round till it pops off. There are some wires hooked up to this piece with a plastic rivet which doesn't seem like it's meant to return off so I left this piece still partially hooked up to the seat. 4. Next, there's one other plastic trim piece on the other facet of the seat on the again corner. Use the T20 bit to take away the screw, and pull the piece off. 5. There's now just one last piece of trim left, and it is a pain. It is the decrease plastic piece on the entrance of the chair. You may see that there are three attachment points. The outer two are simple: simply depress the outward going through tab with a small screwdriver and pull outward on the piece. They're going to pop out. The middle attachment point is harder because the tab you'd wish to press in is definitely going through inward towards the seat so that you cannot get to it. You can, nevertheless, use a small screwdriver and put the head inside the attachment point, angling it in order that it catches on the tab on the inside, and pull the piece downward. It'll come off finally. 4. Now it's time to begin removing the leather! The purpose of eradicating all this plastic trim was to be able to simply and absolutely remove your entire seat cushion. Be aware how all across the seat the leather is stitched to this plastic lip. Now that we've eliminated all the trim, you possibly can pull this plastic lip off of its hold on the seat body. There's one long piece for your entire front, one medium piece in the back, and two short pieces, one on either back facet of the chair. Additionally make sure you undo the little bits on the again corners where the leather-based is held by a plastic button and is stretched over a steel nub. Now we are able to pull the again flap by the hole in between the higher and decrease halves of the chair after which, from the back ahead, pull the cushion up. There's just one final level of attachment: just earlier than the leg extension there's a plastic rib that is connected to the seat frame. This rib is simply held in by some metal tabs, you can start on one end and pull up and it will come out. 5. Now for the actual enjoyable part: we have to remove the leather-based from the foam cushion in order that we can get at the occupancy sensor. On the underside of the cushion, beginning from the again, you will see many metal hogties. I used a pair of pliers to take away them. Simply pinch the ring and switch it until the ends are facing you, then pull them apart and remove the ring. There are four on the surface of the cushion to remove. Then on the inside you'll need to remove a bunch extra. I did 11 rings in total, I believe. Once you get get deep enough between the foam and the leather, you may totally remove the old sensor. It's glued in on the front and on each facet bolsters. 6. Put in your new sensor! I glued mine back in with some Gorilla Glue Gel. Be careful as a result of not much seems to follow that foam. I in all probability went by 4-5 different glues earlier than I found the Gorilla Glue. 7. It's all downhill from right here. Now that you must reattach the leather to the foam. To do this, I used zip ties. Just put them in the precise spots where you eliminated the steel rings. For a number of the tougher components to get a zip tie in place, I was able to push my metallic wire by the opening and use it as a information for the zip tie. 8. Reattach that sucker back to the seat body. Nothing too tough here, simply take it sluggish and go in the reverse from before. It will all match. Don't forget to plug in your new seat sensor to the chair. 9. Reinstall the chair. Overall this mission took me about 6-8 hours. Removing the plastic trim is troublesome, eradicating the hog rings is a pain, and getting the leather-based reattached to the foam takes time. That said, it's all utterly doable with minimal tools. I've written this up as best I can, but I am certain I neglected a couple of steps.