monitor on driver side works well - passenger side is very inconsistent on our new 2025 CX5. (our 2017 cx5 BSM worked perfectly). dealer claims it checks out OKAY - it doesn't.
Any suggestions?

 

Welcome to the forum

 

Your Mazda is still under warranty . You may need to leave your Mazda so that they can have a 24 hour and recheck which should include a short service drive to check out the problem.
Or you can request a ride along to demonstrate the problem you are having to the service writer or service Technician?

Dealers, Service departments don't "claim" (or use that wording on documentation) anything if you read your service report the wording is very carefully considered and chosen.

 

In my experience, the BSM always alerts you when a vehicle is approaching from behind. However, a vehicle travelling at the same speed, already alongside you, or moving slower than you is often not indicated.

From the owners manual:

The BSM is designed to assist the driver in checking the area to the rear of the vehicle on
both sides during lane changes by notifying the driver of the presence of vehicles
approaching from the rear in an adjacent lane.
The BSM detects vehicles approaching from the rear while travelling in the forward
direction at a speed of 30 km/h (19 mph) or faster

A vehicle is in the detection area at the rear in an adjacent driving lane but it does not
approach. The BSM determines the condition based on radar detection data.
A vehicle is travelling alongside your vehicle at nearly the same speed for an extended
period of time.

 

The last two responses are both great suggestions but reading your first posted information wording description comparing the drivers with passenger side inconsistency , my advise again is return to Mazda dealership with this concern as it will if the problem found be a warranty service coverage.
As an authorized Mazda independent warranty service tech it fits the warranty guidelines.

Both sides should work exactly the same .

 

I'm the owner of a 2025 CX5 and a 2016 3. The 3's BSM has worked flawlessly for 9 years on both passenger and driver side. However, the CX5 only detects about 60% of the vehicles on the passenger side. The drivers side is flawless. My CX-5 is currently at the dealer for the 4th time trying to fix this issue. They see the problem, they just can't fix it. Because they think they need to bring in someone from Mazda and it might take some time, they gave me a CX-30 loaner. Low and behold it has the SAME PROBLEM!

Really is unbelievable. I have three sons. One owns a Toyota Rav 4 (2024), one a Hyundai Sonota (2025) and one drives a Toyota Sienna (2012). NONE have this issue.

This should probably turn into a recall. I put in a request with NHTSA, I think you should to.

 

To start curious what testing equipment you used to determine the % rolmao! Don't answer that I know you dont have any... LOL
As a rule I always try to welcome new members but their are always a few during the year like you that that not going to happen!
Dude you literally TROLLED seeking this forum out. I looked at other Mazda forums, and I am sure that I will see you mention your compliant there soon enough and it won't go any better there then here.
Really you joined a specific forum about Mazda to beetch about yours and post no evidence and clearly do not have any clue or understanding about how any dealership which BTW they are independently owned businesses operate.
You waste your time posting this information and seriously its not going to be a a safety recall and reporting to the NHTSA on a low reported problem will see what that gets you? Look into safety recall on this matter , NONE, TSB NONE which would be the first starting point of a safety recall and on all the Mazda forums regarding this a very low count and some are duplicated by members post the same thing on different forums which seems like more on the problem but are not.
As for you "CLAIMING" the other platforms owned by you have no issues.... maybe go join those forum (I belong to a few of them) and read the compliant and issues with those EXACT model you mentioned.

Let me explain something to you how a dealership operates as an independent business. Specifically, Mazda. Maqzda does NOT require that any dealership have on staff/employed a Mazda factory trained and certified Mechanic they are NOT required to have employed an ASE or other of its type Certified Automotive Diagnostic Technician. So, when some customer like you repeatedly go to a Mazda dealership that does not have these type of trained professional YA dude you are going to get the "we cant find the proble" Let me be clear there is not such thing as cant find a problem, only not knowing how to find it.
What you are going to likely get from Mazda is for you to take it to a Mazda dealership that has the experienced certified individual to find the issue with your Mazda. Oh and your visits and the number will not count under Lemon Laws in any state because in the fine print they your vehcle must be service for the issue by a certified individual. A notation that forums posting Lemon law never seem to post the rejected ones based on that fine print in the Law itself when they go to court.
Do you care to provide all the service finalized invoices with the notes from the service advisor and assigned mechanic or Tech on this thread? I mean if you are telling a story lets see the other side of the story as well not just your version. Oh, don't worry I am more than qualified to understand everything including the Mazda coding. . Maybe some of us can weed through the actual facts and the BS with your Mazda complaint?

So really IMHO go find another place to beech and be negative about which is not Mazda forums. At least not as a newly joined member. And good luck with attempting this line of negativity on other Mazda forums.

 

Obviously, safety features should all work as designed but realize all electronics are not equal and all are subject to failure at any point in time.

Now let me introduce a bit of reality here.
All electronics including radar, lane assist, BSM, back-up cameras, etc. are safety enhancements and not replacements for the driver's vision.
They are not designed to replace the driver from visually looking out the windows or at the rear view and side mirrors.
They definitely do not absolve you from responsibility should you get in an accident because you relied on them and didn't bother to actually look.
You are ultimately responsible for your actions when you are driving your vehicle.
You should never rely on a anything but your own sight when driving and never use your phone either.