u/mrsexycow

Looking at getting a CarBahn ECU tune (not piggyback) on my 26 m3 with 2300 miles on it, and paying the 1250 for the warranty. Had a few questions.

1. For those who got this tune, did you feel a TCU tune was necessary too? If it is, that voids the carbahn warranty, so puts a wrinkle in my plan.

2. Would you wait until like 5k (or more?) miles to make sure nothing goes wrong? How early would you tune? Wondering if i should wait til the next oil change to make sure it's not burning/leaking oil / nothing wrong out of the factory.

3. Anyone have experience if this warranty is actually honored, or if it's a huge fight between BMW and Carbahn's warrantier if something happens?

4. Anyone have experience with getting this insured? I've read if you get in an accident they can no-cover you. Right now my geico insurance is absurdly cheap (105 a month for full coverage), and worried that's going to double if I can't go through geico

I have an 2026 M3 comp x drive I’m about to buy that is my ideal spec, basically new, 1800 miles, and comes with an extra set of bmw winter tires/rims, already has PPF and tint… saves me about 8k in upgrades I was already going to do.

I am interested in the new turbos coming with the m ignite update, and already on a waitlist so most likely would get an allocation, but wondering if folks think that’s worth the basically 10k in savings I’m getting on the near-new m3. I’m leaning no, but haven’t driven this car other than a 2 minute test drive, don’t know how annoying the turbo lag actually is.

I’m always driving in manual mode, so I imagine this would only ever be noticeable from a dead stop.

Edit: specifically the VTG turbos that should minimize turbo lag I’m interested in