2012 Mazda 5 Spongy Brake Pedal

Sounds like an ABS issue, you may need a scan tool with ABS activation software to bleed the brakes properly if the system is operational. Or you could have a bad ABS unit.

Why don't you, or why didn't you long ago, take the car to a mechanic to diagnose. At least then you'd know what the problem actually is. From here, I can only tell you what the most likely problems would be based on your description. Yes, maybe it's an ABS problem.

G A - Thanks for your input. I'm able to barrow a scan tool that should be able to activate the ABS module. Hopefully I'll be able to get it working again without having to replace the ABS Module. Ed92626 - It's not my vehicle and I was just recently informed about how long the issue has been going on. Has far as taking it to a shop to get diagnosed comes down to money and I thought it would just be a bleeding issue. After what I found during the bleeding process, I was thinking it could possibly be an ABS problem and just wanted a second opinion from others that have seen this before. Thank you both for your input.

I hope the scan tool does the trick.

I have the same issue, I replaced the master cylinder and replace the front brake pads since it was a little wasted, and the brake pedal still goes all the way down. It brakes well, I have no issue with that.