Mazda cx 5 blind spot monitoring not working

Q: How do I reset my blind spot sensor?

Turn off your vehicles engine and wait a few seconds. After waiting a few seconds, try turning your car on and giving it a second to re-calibrate.

Table of Contents Show

How does it work?
What do manufacturers call it?
My car has it, anything I should know?
How do I reset my blind spot sensor?
Where are the blind spot sensors on Mazda CX 5?
Where is the blind spot sensor located?

As safety technology progresses, driver-assistance features (ADAS) such as Blind Spot Monitor (BSM) are becoming more widely equipped in new cars. Now, BSM can be found in the Perodua Ativa and many of the B-segment cars currently on sale.

How does it work?

Not all Blind Spot Monitor systems use the same detection method but the common solution is via radar sensors mounted at the rear, usually inside the rear bumper. Some systems may employ cameras as well.

Should the sensors detect an object, it’ll relay the signal to the system for notification, which can be in the form of audio or visual. Chimes or buzzers may alert or warning indicators may light up in the side mirrors or on the A-pillar next to the mirror.

What do manufacturers call it?

Brands like Toyota and Volkswagen call it Blind Spot Monitor; BMW calls it Blind Spot Detection; Mercedes-Benz calls it Blind Spot Assist; Volvo calls it Blind Spot Information System; and the list goes on. Despite how manufacturers name their systems, all of them refer to the same feature.

My car has it, anything I should know?

Since we have the Perodua Ativa with no where to go for now, we decided to flip through the half-a-thousand pages owner’s manual and found some interesting titbits.

For one, the manual suggests that owners should keep the area of the rear bumper surrounding the sensors clean. It adds that the system may stop functioning if there are rain drops or dirt on the rear bumper around the sensors.

This would also mean that the system wouldn’t be as effective in the rain, as with most functions of ADAS.

Note that the visible sensors are the reverse sensors, BSM sensors are hidden.

Owners are advised to have the vehicle inspected at an authorised service centre if:

Repairs were carried out on the rear bumper due to impact
There are scratches are on the bumper around the sensors, or misaligned bumper

It even warns owners against changing the colour of the bumper.

Conclusion

Features like BSM are helpful towards drivers but the key point to take away from here is that its function can easily be impaired, and one needs to ensure it is in fully working condition.

But as we always say, features like BSM are just a tool to help drivers and can never be fully relied on. As drivers, it is our duty to drive safely and responsibly.

Also read: Your ACC can't work well in tunnels - and it's not because your car is cheap

Hey guys, took delivery of a 2016.5 cx 5 last night. I'm excited for it! I am having a problem with the blind spot monitoring though. It is showing "off" on the dash. When I press the button to the left, nothing happens. When I start the car the light is on and I can press the button and the light will turn off but then a few seconds later (I'm assuming after a systems check) it turns back on (saying it's off) I press the button and nothing happens. I plan on calling the dealer today but wanted to see if there's anything I can try before calling like disconnecting the battery or something. Any suggestions? Thanks!

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BSM on my car was on from day one. I never had this issue - I dont think i turned it off as well. Get it checked from the dealer.
BSM wont be there for Sport trims. It is available as std. on touring and above. Do let this forum know what your dealer says.

BSM on my car was on from day one. I never had this issue - I dont think i turned it off as well. Get it checked from the dealer.
BSM wont be there for Sport trims. It is available as std. on touring and above. Do let this forum know what your dealer says.

Yeah I have the touring trim so I know it should have it and the one I test drive had it too. Idk if something just needs to be reset or what. But I called my salesman and he didn't answer. I sent an email but will be following with a phone call.

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Perhaps you turn it on via the infotainment system...while car is parked.

Perhaps you turn it on via the infotainment system...while car is parked.

I have tried looking for this setting but to no avail? The only setting I see for the BSM is the level of beep high/low/off. I'll look around again.

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Mine is just an off/on button by the Traction Control and TPM buttons.

I'd take it back to the dealer.

I just did a factory reset on the infotainment system and this popped up

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Sounds like a trip to the dealer is in order. This should of been checked in the dealer delivery pre-inspection.
Was the warning on when you drove it home from the dealer?

There is no activation needed. It's either on or you can turn it off by the button on the left near the vent. Once you turn it off you just press the button again to activate.
There's nothing in the infotainment menus.

Sounds like a trip to the dealer is in order. This should of been checked in the dealer delivery pre-inspection.
Was the warning on when you drove it home from the dealer?
There is no activation needed. It's either on or you can turn it off by the button on the left near the vent. Once you turn it off you just press the button again to activate.
There's nothing in the infotainment menus.

I didn't think anything of it last night when leaving the dealer. It was almost 10pm when we got done and I was hungry and wanting to get home. I tried looking through menus and different things this morning, maybe needed some time on my trip to work(20miles) and nothing. I've already called the general manager. Sighhhhhh

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Did you clean the back bumper? Although I didn't know that had anything to do with it. They didn't leave some of the plastic crap on it, did they? Yea, I doubt it, too. lol

Did you clean the back bumper? Although I didn't know that had anything to do with it. They didn't leave some of the plastic crap on it, did they? Yea, I doubt it, too. lol

I mean the car was washed last night. It's raining currently but I did wipe the bumper off. Haven't checked it since.

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I mean the car was washed last night. It's raining currently but I did wipe the bumper off. Haven't checked it since.
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Never had an issue with mine (except a fence close to the road setting it off at times).

At this point, need to probably take it to the dealer.

There's radar sensors behind the rear quarter panel on each side. Dealer may have to check if one of the wires needs to be reconnected. Sometimes with new electronics a physical disconnect and reconnect gets the contacts to work properly.
https://www.eecs.tufts.edu/~stephen/2014wsm/img.dir/am6zzw00009768.gif

I recall some people having problems with blind spot monitor system AFTER a Tow HITCH Install. Do you have a tow hitch>?

There's radar sensors behind the rear quarter panel on each side. Dealer may have to check if one of the wires needs to be reconnected. Sometimes with new electronics a physical disconnect and reconnect gets the contacts to work properly.
https://www.eecs.tufts.edu/~stephen/2014wsm/img.dir/am6zzw00009768.gif

I'm thinking the same and hopefully that's all it is.

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I recall some people having problems with blind spot monitor system AFTER a Tow HITCH Install. Do you have a tow hitch>?

Na no tow hitch

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Getting off work early to take it in. Will give update.

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Dealer ran diagnostics and called mazda engineering with error code and left module is bad and said to replace. Said they'll order part and have it in 2-3 weeks. I asked if they could just take a module from another car. Left car at dealer and got a loaner and they're going to have the tech do the swap tomorrow.

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Kedis82ZE8

'12 GX 460,'07 G35x / '15 CX-5 AWD GT w/Tech Pkg

Good to hear your dealer took care of it. I get obvious false positives when towing a trailer or when I have my rear carrier & cargo on back. I think there have been a few BSM TSBs but I haven't seen one specific to the CX-5.

Good to hear your dealer took care of it. I get obvious false positives when towing a trailer or when I have my rear carrier & cargo on back. I think there have been a few BSM TSBs but I haven't seen one specific to the CX-5.

Do you have SCBS rear on yours? On mine, when towing the boat trailer, i have to go into menu and turn off SCBS otherwise it slams the brakes on when I try to reverse the boat into my driveway or at the boat ramp!

Other than that I havent had any false positives when towing.

Turn off your vehicle's engine and wait a few seconds. After waiting a few seconds, try turning your car on and giving it a second to re-calibrate.

The radar sensors (rear) function by detecting the radio waves reflected off a vehicle approaching from the rear or an obstruction sent from the radar sensors. The following systems also use the radar sensors (rear). The radar sensors (rear) are installed inside the rear bumper, one each on the left and right sides.

The Blind Spot Monitoring (BSM) system uses two radar-based sensors, located inside the rear bumper fascia, to detect highway licensable vehicles (automobiles, trucks, motorcycles, etc.)