Methods To Change A Seat Occupancy Sensor

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This undertaking has been a very long time coming for me. Virtually a year in the past I left my home windows down during a pretty spectacular thunderstorm (unintentionally pressed the unlock button on my key in my pocket whereas I was walking away from the car and each home windows and the sunroof opened), and on account of some moderately drastic measures on my half to dry out the automobile the only lasting injury was that I now had a seatbelt and airbag warning gentle on my dashboard. I used to be pretty rapidly in a position to determine that these lights had been being brought on by a defective passenger occupancy sensor. Sadly, BMW does not promote simply the sensor, but relatively the whole backside seat cushion for a cool $1200. Effectively I did not need to do that. So I managed to make it via many a month with those annoying warning lights till someday I occurred upon a listing on a salvage automobile elements site that was selling a standalone seat sensor! I snatched up the part and then spent a complete day switching them out. In researching how one can get into the seats I used to be unable to search out a lot of something 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 take away all 4 screws holding the seat down. Once free, go to the trunk and disconnect the battery. Back within the cabin, push the chair back so you'll be able to see underneath and disconnect the yellow wiring harness. There is a black tab on the facet you could match a small screwdriver in. Pull that tab out as far as it would go, then pull out the wiring harness. There is 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 less complicated in the event you also take the headrest off. 2. Now you're going to must remove the plastic cowl on the righthand side of the seat that has the seat controls on it. This piece is held on with 5 plastic tabs: 3 are visible on the underside of the piece and a couple of are hidden inside close to the highest. I used to be in a position to get all but the righthand inside tab using simply my fingers. To get that last 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 while pulling up on the whole piece. That was troublesome. As soon as off, you'll see find out how to controls are wired up, just unplug them so you'll be able to take away the trim fully. 3. Once the outer plastic trim is off, you will be confronted with a second plastic piece. To take away this there's just one bolt (T30) and then you definately simply have to wiggle it around until it pops off. There are some wires attached to this piece with a plastic rivet which does not appear to be it is meant to come off so I left this piece still partially connected to the seat. 4. Next, there's another plastic trim piece on the opposite aspect of the seat on the back nook. Use the T20 bit to take away the screw, and pull the piece off. 5. There's now only one final piece of trim left, and it is a pain. It's the decrease plastic piece on the front of the chair. You may see that there are three attachment points. The outer two are simple: just depress the outward dealing with tab with a small screwdriver and pull outward on the piece. They're going to pop out. The center attachment point is tougher because the tab you'd need to press in is actually going through inward in direction of the seat so you can't get to it. You may, nonetheless, use a small screwdriver and put the head inside the attachment level, angling it in order that it catches on the tab on the inside, and pull the piece downward. It'll come off eventually. 4. Now it's time to start out eradicating the leather-based! The purpose of removing all this plastic trim was to be able to simply and fully take away all the seat cushion. Observe how all around the seat the leather-based is stitched to this plastic lip. Now that we have removed all of the trim, you possibly can pull this plastic lip off of its hold on the seat body. There's one lengthy piece for your complete front, one medium piece in the back, and two short items, one on either again aspect of the chair. Also remember to undo the little bits on the again corners where the leather-based is held by a plastic button and is stretched over a metallic nub. Now we will pull the again flap via the hole in between the higher and decrease halves of the chair and then, from the back ahead, pull the cushion up. There's only one last level of attachment: just before the leg extension there's a plastic rib that's connected to the seat body. This rib is just held in by some metal tabs, you can begin on one end and pull up and it will come out. 5. Now for the real enjoyable part: we need to remove the leather from the foam cushion in order that we are able to get on the occupancy sensor. On the underside of the cushion, starting from the again, you will see many metal hogties. I used a pair of pliers to take away them. Just pinch the ring and switch it till the ends are going through you, then pull them apart and remove the ring. There are 4 on the outside of the cushion to take away. Then on the inside you may have to remove a bunch more. I did eleven rings in total, I think. When you get get deep sufficient between the foam and the leather-based, you may totally remove the previous sensor. It's glued in on the entrance and on both aspect bolsters. 6. Put in your new sensor! I glued mine back in with some Gorilla Glue Gel. Watch out as a result of not a lot seems to keep on with that foam. I probably went by means of 4-5 different glues earlier than I discovered the Gorilla Glue. 7. It's all downhill from right here. Now you want to reattach the leather to the foam. To do this, I used zip ties. Simply put them in the exact spots where you eliminated the metallic rings. For a few of the more difficult parts to get a zip tie in place, I used to be capable of push my steel wire by way of the opening and use it as a guide for the zip tie. 8. Reattach that sucker again to the seat body. Nothing too troublesome here, simply take it gradual and go in the reverse from earlier than. It will all match. Don't forget to plug in your new seat sensor to the chair. 9. Reinstall the chair. Total this project took me about 6-eight hours. Removing the plastic trim is troublesome, removing the hog rings is a ache, and getting the leather-based reattached to the foam takes time. That said, it's all completely doable with minimal instruments. I've written this up as greatest I can, but I'm sure I ignored a few steps.