u/Huge-Shame-5230

I’ve been searching for apartments around Nashville and most of what I’m finding are large, brand new luxury complexes. I’m looking for something smaller and older, but clean, quiet, and well maintained.
I care more about good management, responsive maintenance, soundproofing, and a peaceful community than amenities.
Ideally within a 15 minute drive of downtown. Any specific complexes you’ve had a good experience with?

I honestly don't even know where to begin.

I bought my 2024 Mazda CX-30 brand new from an authorized Mazda dealership. Brand new back in 2024. One owner. I've babied this car since day one. Every single service has been done at the same Mazda dealership that sold it to me.

A few days ago I got a rear seat malfunction warning, so I brought it in expecting a simple warranty repair.Instead, I got one of the biggest shocks I've ever had as a car owner.

The service department told me the Body Control Module (BCM) doesn't appear to be the original one. They even told me it might be a junkyard BCM.

I've never replaced the BCM.
I've never authorized anyone to replace it.
No independent mechanic has ever touched this car.
I have the complete service history.
Even the dealership admits they have no record of replacing the BCM before they sold me the car.

Yet somehow the conversation quickly became "Since it may not be the original BCM, Mazda may not cover it under warranty."Then I was basically told that I have no proof that I didn't replace it myself.

How on earth am I supposed to prove I didn't secretly replace one of the most important computers in my own car?

This is the same dealership that:

• Sold me the car brand new.
• Has performed virtually all of the service.
• Has no documentation showing the BCM was ever replaced.

So if I didn't replace it...and they didn't replace it...

Then where did this BCM come from?

To make things even bizarre, I've had a few incidents where someone got into my car without obvious signs of forced entry. I don't know if those things are related, and I'm not claiming they are, but looking back, it makes me wonder whether there has been an electrical issue for a while.

Tomorrow I'm opening a case with Mazda Customer Experience because I honestly feel like I'm stuck in the middle of something that makes no sense.

Has anyone here sever seen anything like this?

Can Mazda determine whether the BCM originally belonged to another VIN?

Could dealership records ever miss a BCM replacement?

Has anyone successfully gotten Mazda corporate involved in a situation like this?

Because right now I genuinely feel like I bought a brand-new car, and now I'm being asked to defend myself over a part I never touched.

Update!! Second Mazda dealer kept my CX-30 for 4 hours, gave a different explanation, and wouldn’t provide the diagnostic paperwork

Hi guys, here’s an update. First of all, thank you so much for all the helpful comments and technical suggestions on my previous post. I used many of the questions you recommended when I went to another dealership today.

Today, I went to another major authorized Mazda dealership near Nashville. I already knew it was a sister store of the first dealership, but because these are two of the main Mazda dealerships in my area, I still wanted another technician to inspect the vehicle.

At first, I did not disclose what the first dealership had told me. I only explained the warning and asked them to independently inspect the F-BCM.

I asked them to check:

• The exact F-BCM part number and serial number.
• Whether there was any VIN, configuration, calibration, or software mismatch.
• Whether the module physically appeared to have been removed or previously installed.
• Whether the F-BCM was actually causing the rear-seat warning.
• Whether they could provide the complete diagnostic report, technician notes, and photos of the module label.

I also specifically asked them not to reprogram, reset, initialize, remove, or replace the module before documenting its current condition.

The inspection took approximately four hours again. At some point, the general manager and other employees became involved, and they appeared to have several discussions or meetings about the situation.

The final explanation they gave me was: The number printed on the BCM currently installed in the vehicle is a production number. That is why it may be different from the number shown in the Mazda parts catalog. If the BCM eventually needs to be replaced, it should be covered under warranty.

This explanation seems to conflict with what the first dealership told me. The first dealership said the module did not appear original, appeared previously installed or used, and might be associated with a CX-50.

When I asked the second dealership to send me the diagnostic paperwork and technician findings, they would not give them to me at that time. They told me I needed to speak with the general manager first.

By that point, I was exhausted, and the dealership was about an hour away from my home, so I drove home.

I’m confused about why this has become so complicated. If their conclusion is simply that the number is a production number and the module is normal, why can’t they provide the diagnostic paperwork showing what they inspected and what they found?

I am not accusing either dealership of changing or erasing information. However, because the two stores are connected and gave me conflicting explanations, I am concerned about allowing the module to be reprogrammed, reset, or replaced before I receive documentation of its current condition and diagnostic data.

I will attach two videos showing what representatives from both dealerships told me.

My questions are:

1. Is it normal for the number printed on a BCM to be a production number that differs from the Mazda parts-catalog number?
2. Does the second dealership’s explanation make technical sense?
3. Why would they require me to speak with the general manager before releasing the diagnostic paperwork?
4. Should they be able to provide the diagnostic codes, repair order, technician notes, and module information?
5. Should I now seek an inspection from a Mazda dealership outside this dealer group?
6. Should I open a formal Mazda Customer Experience case before allowing anyone to reprogram or replace the module?

Thank you again for helping me understand this. I genuinely appreciate all the advice because the explanations from the two dealerships are now completely different.

https://reddit.com/link/1v35aq3/video/miemb8audweh1/player

https://reddit.com/link/1v35aq3/video/sbluq8audweh1/player