10-31-2022, 07:51 AM | #1 |
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X5 - 40i exhaust flap mod
Just my 2-cents on the flap mod.
New to the forum. Picked up a '23 X5 40i m-sport, traded in my 535ix after many enjoyable miles. Had an X5 back in 2013 when the engine had the tendency to foul plugs regularly. Was reading through the forums for some mods, enhancements. So I picked up an OBD devices, downloaded bimmercode and bimmerlink. I'm not interested in replacing the exhaust, pipes, remove cats, etc. So I thought I would try out the exhaust flap mod to give the X5 a little more sound. Connected the OBD, opened the flap with bimmerlink and pulled the fuse. My feedback on the bimmerlink app/OBD for the exhaust mod: ---If the exhaust mod is all you're going to do and you want it open all the time, don't waste $90 on an OBD device and $35 on the app, there's not much else you can do, unless you want to fiddle with reading and resetting error codes. Save your money, on a cold start up (at least with my X5), I find that the flap opens and stays open for at least a couple of minutes. If you open the floor hatch, and the fuse door. You should have ample time to pull the fuse before your flap closes. ---If you want to be able to control when it's open or closed, then go ahead and make the app and OBD purchases. ---I will probably use bimmercode to make some "adjustments" to other features. My feedback on the flap vs no flap: ---It's gives a bit more sound idling and driving around town/in traffic with varying RPMs. You'll get more sound at lower RPMs. ---On the highway, with cruise control set between 70-80, it becomes a dull annoying drone, at the RPM level. On a couple hour road trip, after the first hour, I had to pull over at a rest stop and put the fuse back in to close the flap. Again, just my 2-cents. Hope to make more posts, share ideas, etc. |
11-02-2022, 06:34 AM | #3 |
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Pulled the fuse. I'm not the type to crawl under a vehicle.
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11-02-2022, 01:48 PM | #5 |
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11-03-2022, 06:42 PM | #7 |
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11-05-2022, 07:57 AM | #8 | |
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I thought on a cold start the wastegate opens - not the exhaust valve. But otherwise agree with your other points - the drone on highway is annoying. |
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11-07-2022, 09:13 AM | #9 |
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Yes, I did this over the past weekend to give it one more try, the car had been sitting for a full day. I did not have the OBD connected. Opened the fuse cover, used the remote starter to start the car and pulled the fuse. It still have the open flap sound today.
So I'm not sure about the technical aspects of what is/isn't opening on my X5 vs someone else's and the conditions. However, it appears to work that way for me. Thanks for chiming in! |
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Tropikal21.00 |
11-07-2022, 09:41 AM | #10 |
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My exhaust flap doesn't open under a cold start in any driving mode. Short of buying a obd adapter and the bimmer link app, I dont know how to open the damn thing.
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11-09-2022, 08:46 AM | #11 |
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well, i will tell you what i did. i put the car on launch mode and asked my friend in the truck to pull the fuse out, and it actually worked
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03-09-2023, 05:38 PM | #13 |
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Did this yesterday. Bought the BimmerLink app opened the flap and pulled the fuse. Love it. Sounds so much better!
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05-14-2024, 12:01 PM | #15 | |
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Sorry to ask twice. But did you get any alert or check lights in dashboard ! |
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05-15-2024, 06:35 PM | #16 | |
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1. Start the car and wait until the engine is warm (maybe around 5mins)then change mode to sport plus the flap will open.! 2. Pop the trunk locate the fuse (#203 7.5 amp) use needle nose plier and pull it. The flap will stay open all the time until you put the fuse back in. Hope this helps. |
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05-16-2024, 11:51 AM | #17 |
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Thank you for the information, but I noticed something when engine is warming Up . The sound is louder, and it gets quiet after 2 to 3 minutes , Does it mean flap in this time is opened or it’s open in sport mode only.
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05-18-2024, 08:55 AM | #18 |
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The flap will stay close until you switch to sport/sport plus mode only, On cold start the wastegate opens and etc. the car will be loud for 15-30 seconds to warm itself but has nothing to do with the flap. You can feel the steam coming out from the exhaust on one side and both exhausts after switching the modes(just don’t get too close to the tips lol)
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05-19-2024, 05:35 AM | #19 | |
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Yes. I checked this morning and only driver’s side is on and airflow noticeable. But the passenger side is not. I tried switch to sport but no air coming in the passenger’s side. |
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05-19-2024, 08:56 AM | #20 |
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Did you wait long enough until the engine is warm? If not the flap won’t open no matter how you keep switching the modes. Usually wait a good 5 mins for mine without having to drive but you can try to drive around for a few minutes and try switching the modes again and it will open, you’ll hear a clicking sound when switching w/your radio off.
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05-19-2024, 09:47 AM | #21 | |
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i recall doing it after driving i stopped then i switch to sport mode. I will give it a second try. |
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05-19-2024, 11:13 AM | #22 |
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On the the LCI it won’t open by switching modes only in sport mode after a certain RPM it opens and closes. If you wanna pull the fuse warm up the car floor it in sport mode have someone in the trunk and pull it. Or remove the spring clip and tie some wire. But like someone commented about the drone is annoying with it open in certain rpms
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