Mazda CX30 Diesel ABS/DSC Non-Responsive: Seeking Advice on Brake Booster Sensor Issues

Hey, sounds like a real pickle you're in with your CX30. Had a similar problem with my 2016 Mazda CX-5, felt like stepping on a marshmallow every time I hit the brakes. The warning lights were driving me bonkers too. Turns out, my brakes were incorrectly bled, same as what you suspect. Remember, if you're losing pedal pressure, chances are the brake system is full of air, which causes that spongy feeling. Now, listen, it wasn't a quick fix but not too nasty either. My garage properly drained my brake fluid, and bled the brakes with some useful tools to get rid of all the air bubbles in the system. Then they filled her back up, and everything was peachy afterwards. It wasn't a minor issue for sure, since brakes are a major safety component, but once sorted she was back on the road feeling like a brand new ride. So, suggest you get your mechanic to double-check on the brake fluid level and ensure a correct brake bleeding process. If he knows his Mazda, he shouldn't find it too hard. Good luck!

Hey there, I'm another Mazda enthusiast with a similar issue. Same situation with my 2018 CX30 a while back - irritating warning lights and a brake pedal softer than a baby's bottom. So can definitely relate to your problem! The fix for me was quite like what the fellow above suggested. My mechanic ended up fully draining and refilling the brake fluid and did a thorough bleed of the brake system. Made a world of difference and my brake pedal was back to its firm self in no time. Just out of curiosity, you remember how deeply you had to dig into your wallet for that fix? And, has anything else cropped up since then in regards to the ABS/DSC and the whole brake system issue? Cheers!

Hey there, good to see more Mazda comrades chiming in! Yeah, like I mentioned in my initial reply, it was essentially the same fix with the brake system. The mechanic did a proper bleeding and all that jazz. Afterward, my Mazda was braking like a champ, no more marshmallow pedal. As for the cost, surprisingly it wasn't too steep. If memory serves right, it was about 90.00 €. Now, I'm not saying that's chump change, but considering how critical brakes are for our safety, I think it's a fair price to pay to make sure the car stops when it should, right? As for the pressure sensor signal error you were curious about, that's been taken care of since the visit to the mechanic. No more pesky warning lights looming over my dash, thankfully. So all in all, after the brake bleed and fix, my Mazda's been running pretty smooth, no further ABS/DSC or brake system issues. Hope that answers your questions! Keep those rotaries spinning! Cheers!

Heya guys, thank you a ton for sharing your experiences and advice! So, I bit the bullet and took my CX30 to the mechanic. I had a word about the spongy brakes and the potential issue with the brake fluid and bleed. He was on the same page with me and did exactly what you guys suggested. He fully drained the brake fluid, then bled the brakes until all the air was out, and finally refilled it. It wasn't a quick in-and-out process, but it was worth it. My car's brakes now feel as firm as ever, and those annoying warning lights vanished! The cost? It wasn't exactly peanuts, but around 100.00 €. Considering this is about my safety, I think it's money well spent. After the whole deal, my ABS/DSC was functioning without any problem. Same goes for the rest of the brake systems. So, no more surprises! I’ll keep an eye on it and update here if anything else comes up. Again, thanks heaps for your insights, very much appreciated! Happy and safe driving! Cheers!