My bmw F30 keeps showing bonnet open message. How do I fix this? Already bought a new bonnet catcher and sensor, but problem persists.

Jan 12, 2011 - 21 posts - ‎9 authors
Coolant light keeps coming on E46 (1999 - 2006) ... stick was where it was saying it should be in the manual (poking up just above the rim). ... Perhaps your coolant levelsensor is on the fritz. ... Lots of roads, including major highways, are still closed due towater or sludge and rubbish left over from flooding. Has your pre-LCI F30 been reliable so far?
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Sounds like the bonnet switch might be going out. You have an electrical contact switch that tells the alarm computer if the bonnet is open or closed. Either a miss adjusted or worn switch will send a false signal to the computer making it think it is open when it is not, you will also want to check the wiring that goes to the switch for signs of chaffing or kinks as the wire itself could get and send a false signal.

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My BMW 1 series keeps saying the bonnet is open when its not, and the alarm keeps flashing up on the dash. Any help?.

Check the bonnet pin (small switch that is pushed in and out by the bonnet opening and closing) which tells the computer if the bonnet is open or close, maybe its faulty or broken and the computer thinks the open is always open even though its closed.

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Where is the bonnet closed sensor on the landrover discovery 3, my horn beeps when locking car and an error message says bonnet open. I'm away in Germany for a month which isn't much help.Any advice on...

After more thorough search in better light and removing grill etc. I found the bonnet sensor is underneath the RIGHT HAND bonnet latch (opposite side to battery for RH Drive models). there is a mini plug,with 2 contacts accessible from engine side without removing the grill, release plug latch to remove plug and short out the two pins of the plug then tape to secure. I can now lock the car without the horn blowing. As for replacing the actual switch, that will be another small job but when I return to the UK.

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Had the same problem. I cleaned the bonnet open/close sensor located at the back left of the engine compartment, and sprayed it with wd40. Worked a treat for me. Another solution is to push you lock button twice. This turns off the interior movement sensor.

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prvmartin · Answer 2 · 8/16/2009 12:00:00 AM

After more thorough search in better light and removing grill etc. I found the bonnet sensor is underneath the RIGHT HAND bonnet latch (opposite side to battery for RH Drive models). there is a mini plug,with 2 contacts accessible from engine side without removing the grill, release plug latch to remove plug and short out the two pins of the plug then tape to secure. I can now lock the car without the horn blowing. As for replacing the actual switch, that will be another small job but when I return to the UK.

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s_webb_uk · Answer 3 · 1/28/2010 12:00:00 AM

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Brad Sturley · Answer 5 · 11/7/2011 12:00:00 AM

Check the bonnet pin (small switch that is pushed in and out by the bonnet opening and closing) which tells the computer if the bonnet is open or close, maybe its faulty or broken and the computer thinks the open is always open even though its closed.

My bmw F30 keeps showing bonnet open message. How do I fix this? Already bought a new bonnet catcher and sensor, but problem persists.

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