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Discussion Starter · #1 ·
Hey guys, need your opinions on this problem.

I posted this to the redardetector.net board, however need BMW-specific opinion, plus it takes a while for posts to get approved there, so here it is:

I have 2009 BMW E61 (535xiT) with Active Cruise Control (stop and go).
I finally found time over the weekend to install my brand new BEL STIR remote radar detector, drove the car with it and RD is going off constantly with K-band alert at around 24,229 to 24,247 Khz frequency. Couple of hours later after digging around my car I figured out that it is an Active Cruise Control (ACC) feature on my car that is broadcasting in above frequency range. I did test this RD before installation by placing it on the dashboard and driving around town for a couple of days - all worked well. My RD sensor was installed in the lower bumper grill, see the pic below:
Green spot - lower grill on driver side



The three ACC sensors are located all around front bumper:
two behind a bumper cover either side of license plate and 3rd, visible in the picture, is in lower grill on pass side.
Looked at STIR manual - I can not segment K-band, only disable the entire band.
Am I screwed?
After spending $ on RD and 2 days installing it this RD is pretty much useless??

Turning off ACC is not really an option since the car maybe spitting warnings all the time. Besides, I used it in heavy stop and go traffic and it really works great (scary, but works)
However, if this is my only option, is it OK to disable ACC by pulling out its fuse? Will I get nagging messages about some sort of system failure?

Wouldn't it be great if RD manufacturers or dealers warn you before selling a product that doesn't work for your application? I did a lot of research before spending this much money on RD, including complaints about parking sensors interference (which I also have) from some cars, windshields etc.
My car did not come up in any search... :mad:

Any ideas? (on how to insulate RD sensor, relocate it etc)
I just do not see myself driving with RD on my windshield...

Thanks
 

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That sucks! But why would someone in a boring station wagon be breaking the speed limit?:rofl:

I ordered my 2008 535XiT without PDC or active cruise so I could get the Escort 9500ci installed. For me the radar/laser detection was more important (as well as the Dinan S2 tune...). BTW - the laser jamming does work...

I do get random/false alerts (not annoyingly so) when passing cars with active cruise. When I tried to ask Escort about a possible solution, they ignored me and didn't want to admit there was an issue...

Hope someone on the forum can help!
 

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Discussion Starter · #3 ·
That sucks! But why would someone in a boring station wagon be breaking the speed limit?:rofl:

I do get random/false alerts (not annoyingly so) when passing cars with active cruise. When I tried to ask Escort about a possible solution, they ignored me and didn't want to admit there was an issue...

Hope someone on the forum can help!
I know right? ;)

I got this car used, so did not have much of a choice.
Escort never stroke me as a consumer friendly corporation either, so I never owned their product ... until they bought Belltonics :cry:
Did I just say "monopoly"??
 

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That sucks! But why would someone in a boring station wagon be breaking the speed limit?:rofl:

I ordered my 2008 535XiT without PDC or active cruise so I could get the Escort 9500ci installed. For me the radar/laser detection was more important (as well as the Dinan S2 tune...). BTW - the laser jamming does work...

I do get random/false alerts (not annoyingly so) when passing cars with active cruise. When I tried to ask Escort about a possible solution, they ignored me and didn't want to admit there was an issue...

Hope someone on the forum can help!
We have both Active Cruise and the Escort 9500ci installed on a 2010 335i and a 2011 335d and have had no problems with false alarms.
 

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never heard of it interfering with the car it is installed on. if you cant find a solution, which there might not be one, i would take it off and sell it or try to return it. the only problem is escorts customer service is not very good so you might be up a creek. you would be better off going with laser interceptors and a windshield mount detector if you want the best results. the belscort laser jammers are pretty much the least effective jammers on the market.
 

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Discussion Starter · #6 ·
We have both Active Cruise and the Escort 9500ci installed on a 2010 335i and a 2011 335d and have had no problems with false alarms.
Now I am confused, maybe BMW changed the frequency range due to RD owners' complaints? :rofl: But this is just sooo not corporate...

One other thing I can think of is Lane Departure Warning that I have, but then it must be using the same sensors as ACC.

Do you have lane departure option on your 3ers?

Thanks
 

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Now I am confused, maybe BMW changed the frequency range due to RD owners' complaints? :rofl: But this is just sooo not corporate...

One other thing I can think of is Lane Departure Warning that I have, but then it must be using the same sensors as ACC.

Do you have lane departure option on your 3ers?

Thanks
I think Lane Departure is a camera based system. No radar involved as far as I know.
 

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Now I am confused, maybe BMW changed the frequency range due to RD owners' complaints? :rofl: But this is just sooo not corporate...

One other thing I can think of is Lane Departure Warning that I have, but then it must be using the same sensors as ACC.

Do you have lane departure option on your 3ers?

Thanks
No lane departure option on our cars.
 

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Discussion Starter · #9 ·
We have both Active Cruise and the Escort 9500ci installed on a 2010 335i and a 2011 335d and have had no problems with false alarms.
Would you share location(s) of where radar sensors are installed on your cars?
It seems that RD location maybe a culprit in my case.

Here, post #7, relocating V1 lower on windshield (= my case with RD sitting on dashboard) gets rid of false K band alerts from ACC :

https://www.bimmerfest.com/forums/showthread.php?t=501776

Could anybody else confirm that RD location is critical in case with vehicle equipped with ACC?
 

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Have you tried relocating the power and or ground? I would also say add a power filter. I have read a lot out here ( http://www.radardetector.net/forums/ ) about people having issues and once they applied the filter to the power the problem went away.

This had a good explanation about about noise coming from power source and other things. Link
 

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If your radar detector has this feature, then make life simple and just turn off the K band. Most states no longer use it as most law enforcement agencies only use either Ka or laser. Do a google search to see if your municipality even uses the K band. Where I live in NY, none of the police agencies use it or the even more outdated X band. The only time I see K band used is on the fixed warnings that post your current speed.
 

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Discussion Starter · #12 ·
Have you tried relocating the power and or ground? I would also say add a power filter. I have read a lot out here ( http://www.radardetector.net/forums/ ) about people having issues and once they applied the filter to the power the problem went away.

This had a good explanation about about noise coming from power source and other things. Link
I have not, but it sounds like it is worth trying after reading those links, thanks!
 

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Discussion Starter · #13 ·
If your radar detector has this feature, then make life simple and just turn off the K band. Most states no longer use it as most law enforcement agencies only use either Ka or laser. Do a google search to see if your municipality even uses the K band. Where I live in NY, none of the police agencies use it or the even more outdated X band. The only time I see K band used is on the fixed warnings that post your current speed.
It looks like they still use K band out in the boonies around CO, and I do drive there on weekends for skiing, mountain biking, hiking etc.
And that is exactly where I had all my speeding tickets while living in CO - in the middle of nowhere :mad:
 

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Discussion Starter · #14 ·
We have both Active Cruise and the Escort 9500ci installed on a 2010 335i and a 2011 335d and have had no problems with false alarms.
I read here that Europe approved new frequency for Cruise Control devices, so maybe that explains why your 2010 and 2011 MY cars no longer broadcast in K band, my car is 2009

http://www.radardetector.net/forums/enforcement-technology-tactics/74030-rebirth-k-band.html

On the other hand K band is coming back, while Ka is being phased out (in EU). US maybe joining this clusterf...k soon :eek:
 

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I have the laser interceptor quad, 9500i mounted high and 9500ci. I would switch over to Escort because you can lock out the signal. Do not turn off K band on your radar. You can get in with I/O or Q/T or running Radar. K band in very deadly! You can turn off X band pending where you live at. As far as I know NJ still you the lengthy X band. Try mounting the radar 16 inches or more away from the sensor but it has to be clear view of the road with nothing in front and level. I would cut into the plastic grill to make it flush and more concealed.
 
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