BMW 8 Series Transmission Crisis: Warning Lights & Noises

Hey there! I actually faced similar symptoms with my 2018 BMW M4 last year. The transmission warning lights and rough shifting are classic signs of low transmission fluid, exactly what I experienced. When I brought it to the garage, they found a slow leak from one of the transmission seals. In my case, they had to replace the faulty seal, flush the transmission, and refill with new fluid. While the repair itself wasn't extremely complicated, it was crucial to address it quickly to prevent permanent transmission damage. Running low on transmission fluid can seriously harm the gearbox internals if left unchecked. The whole job took about a day at the shop, and the transmission has been shifting smoothly ever since. Based on your symptoms, it sounds very similar to what I went through. I'd recommend getting it checked asap before any major damage occurs to the transmission components. Just remember to keep the car in emergency mode and avoid aggressive driving until you get it looked at. Hope this helps with your decision!

Thanks for sharing your experience! That sounds exactly like what I'm dealing with. Your insight about the transmission seal is really helpful, I'll definitely get mine checked right away. Quick question though, do you remember roughly how much the whole repair set you back? And has everything been running smoothly since, or have you noticed any other issues pop up?

Hey again! Glad I could help! Just wanted to give you a quick update since I know you asked about costs. I actually just got my M4 back from the mechanic last week for this exact issue. The Transmission oil pressure sensor fault has been completely fixed, running like a dream now with no warning lights or weird shifting. The total bill came to 365 € for fixing both the sensor and dealing with the low gearbox oil level. Honestly, it was worth every penny. The transmission is shifting butter-smooth now, and I haven't had a single problem since the repair. No emergency mode, no grinding, nothing, it's like having a new car again! My advice was spot on about getting it checked quickly. Catching these things early really helps avoid bigger problems down the road. Trust me, you'll feel the difference as soon as it's fixed. The peace of mind alone is worth it. Let me know how yours turns out when you get it looked at!

Just got back from the mechanic and wow, what a relief! Turns out you were absolutely right, it was actually a faulty sensor combined with a small transmission fluid leak. The mechanic found it pretty quickly and fixed both issues. Bill came to about 400 € total, which wasn't as bad as I feared. Can't believe what a difference it's made! My BMW's running smoother than ever now, no more warning lights or that awful grinding noise. The emergency mode is gone too, and the gearbox shifts perfectly again. Such a weight off my mind knowing it's all sorted. Really appreciate you sharing your experience, it helped me understand what I was dealing with and gave me the push to get it checked out before things got worse. Funny how similar our issues were! Thanks again for your help, definitely saved me from some potentially expensive transmission damage down the line.