Learn How To Substitute A Seat Occupancy Sensor

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This undertaking has been a long time coming for me. Almost a 12 months ago I left my windows down throughout a pretty spectacular thunderstorm (by accident pressed the unlock button on my key in my pocket whereas I used to be strolling away from the automotive and each windows and the sunroof opened), and as a result of some moderately drastic measures on my part to dry out the automotive the only lasting harm was that I now had a seatbelt and airbag warning light on my dashboard. I was fairly rapidly able to find out that these lights have been being caused by a faulty passenger occupancy sensor. Sadly, BMW does not promote simply the sensor, but rather your complete bottom seat cushion for a cool $1200. Well I didn't want to do this. So I managed to make it via many a month with those annoying warning lights till sooner or later I happened upon an inventory on a salvage car parts site that was selling a standalone seat sensor! I snatched up the part after which spent an entire day switching them out. In researching the right way to get into the seats I was unable to search out much of something useful on this forum so I figured I ought to write up this DIY to assist others out. 1. Remove the seat (duh). You'll use the T50 bit to take away all 4 screws holding the seat down. As soon as loose, go to the trunk and disconnect the battery. Again within the cabin, push the chair back so you may see underneath and disconnect the yellow wiring harness. There's a black tab on the facet which you could match a small screwdriver in. Pull that tab out as far as it's going to go, then pull out the wiring harness. There's a separate wire connector on prime too: squeeze the sides to launch it and disconnect that too. Now pull the seat out of the automobile. This is less complicated if you happen to also take the headrest off. 2. Now you are going to must remove the plastic cover on the righthand paste2.org aspect of the seat that has the seat controls on it. This piece is held on with 5 plastic tabs: Three are seen on the bottom of the piece and a pair of are hidden inside near the highest. I used to be able to get all but the righthand inside tab utilizing simply my hands. To get that final tab I had to bend a hook shape into a piece of thick wire and fish that by way of to the tab and pull the tab whereas pulling up on the entire piece. That was troublesome. As soon as off, you'll see easy methods to controls are wired up, simply unplug them so you may remove the trim totally. 3. Once the outer plastic trim is off, you will be confronted with a second plastic piece. To take away this there's only one bolt (T30) and then you definitely simply should wiggle it round until it pops off. There are some wires attached to this piece with a plastic rivet which doesn't look like it is meant to come off so I left this piece nonetheless partially connected to the seat. 4. Subsequent, there's one other plastic trim piece on the opposite side of the seat on the again nook. Use the T20 bit to remove the screw, and pull the piece off. 5. There's now just one final piece of trim left, and it is a pain. It's the lower plastic piece on the front of the chair. You'll see that there are three attachment factors. The outer two are easy: simply depress the outward facing tab with a small screwdriver and pull outward on the piece. They're going to pop out. The middle attachment level is tougher because the tab you'd need to press in is definitely going through inward towards the seat so that you can't get to it. You can, nonetheless, use a small screwdriver and put the pinnacle contained in the attachment point, angling it so that it catches on the tab on the inside, and pull the piece downward. It'll come off finally. 4. Now it is time to start out removing the leather! The point of removing all this plastic trim was to be able to simply and totally remove the entire seat cushion. Word how all across the seat the leather-based is stitched to this plastic lip. Now that we have eliminated all the trim, you possibly can pull this plastic lip off of its hold on the seat frame. There's one long piece for the whole front, one medium piece within the back, and two quick items, one on either again aspect of the chair. Additionally you should definitely undo the little bits on the again corners where the leather is held by a plastic button and is stretched over a metal nub. Now we can pull the again flap via the gap in between the upper and lower halves of the chair and then, from the again forward, pull the cushion up. There's just one final point of attachment: simply before the leg extension there is a plastic rib that's connected to the seat frame. This rib is just held in by some metal tabs, you can start on one end and pull up and it's going to come out. 5. Now for the actual enjoyable half: we have to take away the leather from the foam cushion in order that we are able to get at the occupancy sensor. On the underside of the cushion, starting from the again, you'll see many metal hogties. I used a pair of pliers to remove them. Just pinch the ring and switch it till the ends are going through you, then pull them apart and take away the ring. There are 4 on the surface of the cushion to take away. Then on the inside you will need to remove a bunch more. I did 11 rings in total, I feel. When you get get deep sufficient between the foam and the leather-based, you possibly can totally take away the previous sensor. It is glued in on the entrance and on both facet bolsters. 6. Put in your new sensor! I glued mine back in with some Gorilla Glue Gel. Watch out because not a lot appears to stick with that foam. I probably went by means of 4-5 totally different glues before I discovered the Gorilla Glue. 7. It's all downhill from right here. Now you could reattach the leather-based to the foam. To do that, I used zip ties. Simply put them in the exact spots the place you eliminated the metal rings. For a number of the tougher elements to get a zip tie in place, I was able to push my metallic wire via the opening and use it as a guide for the zip tie. 8. Reattach that sucker back to the seat body. Nothing too troublesome here, just take it slow and go in the reverse from before. It's going to all match. Don't forget to plug in your new seat sensor to the chair. 9. Reinstall the chair. Overall this project took me about 6-eight hours. Eradicating the plastic trim is difficult, removing the hog rings is a pain, and getting the leather reattached to the foam takes time. That said, it is all fully doable with minimal tools. I've written this up as best I can, but I'm positive I disregarded a couple of steps.