How One Can Exchange A Seat Occupancy Sensor

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This challenge has been a very long time coming for me. Virtually a yr ago I left my windows down throughout a pretty impressive thunderstorm (by accident pressed the unlock button on my key in my pocket while I was walking away from the automobile and both windows and the sunroof opened), and as a result of some reasonably drastic measures on my part to dry out the automotive the one lasting damage was that I now had a seatbelt and airbag warning light on my dashboard. I was fairly rapidly ready to find out that these lights have been being caused by a defective passenger occupancy sensor. Sadly, BMW does not promote just the sensor, but slightly the entire bottom seat cushion for a cool $1200. Nicely I didn't want to do this. So I managed to make it through many a month with these annoying warning lights till at some point I happened upon a list on a salvage car parts site that was selling a standalone seat sensor! I snatched up the part and then spent a whole day switching them out. In researching easy methods to get into the seats I was unable to find much of anything useful on this discussion board so I figured I ought to write up this DIY to assist others out. 1. Take away the seat (duh). You'll use the T50 bit to remove all four screws holding the seat down. As soon as loose, go to the trunk and disconnect the battery. Back 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 aspect which you could fit a small screwdriver in. Pull that tab out so far as it'll go, then pull out the wiring harness. There's a separate wire connector on prime too: squeeze the sides to release it and disconnect that too. Now pull the seat out of the automotive. This is simpler if you also take the headrest off. 2. Now you're going to need to take away 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: Three are visible on the underside of the piece and a couple of are hidden inside close to the top. I used to be capable of get all but the righthand inside tab using just my hands. To get that last tab I had to bend a hook shape into a chunk 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 tough. Once off, you'll see learn how to controls are wired up, simply unplug them so you may take away the trim solely. 3. Once the outer plastic trim is off, you may be confronted with a second plastic piece. To remove this there's only one bolt (T30) and then you definitely just should wiggle it around until it pops off. There are some wires connected to this piece with a plastic rivet which doesn't appear like it's meant to come off so I left this piece nonetheless partially connected to the seat. 4. Next, there's one other plastic trim piece on the opposite aspect 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 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 factors. The outer two are simple: simply depress the outward dealing with tab with a small screwdriver and pull outward on the piece. They'll pop out. The middle attachment level is more difficult as a result of the tab you'd need to press in is actually facing inward in the direction of the seat so you cannot get to it. You may, however, use a small screwdriver and put the pinnacle contained in the attachment level, angling it so that it catches on the tab on the inside, and pull the piece downward. It's going to come off finally. 4. Now it is time to start removing the leather-based! The point of eradicating all this plastic trim was to be in a position to simply and totally remove your entire seat cushion. Note how all around the seat the leather is stitched to this plastic lip. Now that we've eliminated all the trim, you'll be able to pull this plastic lip off of its hold on the seat body. There's one lengthy piece for the entire entrance, one medium piece within the again, and two short items, one on either back aspect of the chair. Also be sure to undo the little bits on the again corners where the leather is held by a plastic button and is stretched over a metallic nub. Now we will pull the back flap by means of the hole in between the upper and decrease halves of the chair and then, from the back ahead, pull the cushion up. There's just one last point of attachment: just before the leg extension there is a plastic rib that is connected to the seat body. This rib is simply held in by some metallic tabs, you can begin on one end and pull up and it's going to come out. 5. Now for the actual fun half: 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 back, you may see many metal hogties. I used a pair of pliers to remove them. Simply pinch the ring and switch it until the ends are going through you, then pull them apart and take away the ring. There are four on the surface of the cushion to remove. Then on the inside you may need to take away a bunch extra. I did eleven rings in whole, I think. Once you get get deep enough between the foam and the leather, you may fully take away the previous sensor. It is glued in on the entrance and on both side bolsters. 6. Put in your new sensor! I glued mine again in with some Gorilla Glue Gel. Be careful because not much seems to stick to that foam. I in all probability went through 4-5 different glues earlier than I discovered the Gorilla Glue. 7. It is all downhill from right here. Now you'll want to reattach the leather to the foam. To do this, I used zip ties. Simply put them in the exact spots the place you removed the metal rings. For a number of the tougher elements to get a zip tie in place, I was capable of push my metallic wire by the opening and use it as a guide for the zip tie. 8. Reattach that sucker back to the seat body. Nothing too difficult here, simply take it gradual and go within the reverse from earlier than. It'll all match. Don't forget to plug in your new seat sensor to the chair. 9. Reinstall the chair. General this challenge took me about 6-8 hours. Eradicating the plastic trim is tough, removing the hog rings is a ache, and getting the leather-based reattached to the foam takes time. That stated, it is all utterly doable with minimal instruments. I've written this up as greatest I can, but I'm positive I disregarded just a few steps.