***UPDATES*** P0301 Cylinder 1 Misfire | Slowly Losing Coolant Over Time | Oil Still Clean (So Far) | 37,000 Miles

I got it back last night. They put it in faster than I expected. So far so good. SOOOOO grateful this failure happened under warranty! Prior to purchasing in December 2021 I had no idea the 2.0 was affected by the coolant intrusion issue (and didn't learn about it until around February 2022). At the time I bought it I heard reports of the 1.6 experiencing those issues, but somehow didn't know the 1.5, 2.0 and 2.3 were also affected. Had I known, I would not have purchased the vehicle even though I love it with the exception of some peeves.

I was told no break-in is required, but how can they tell me that if the engine is brand new? I still plan on following the break-in guidelines for the first 1,000 miles as stated in the manual. I also planned on getting the transmission fluid changed but I was told that shouldn't need to be done until 60,000 miles, unlike the 30,000 miles stated in the manual. 60,000 sounds a lot more realistic and is more in line with other vehicles I've owned. Until this car, I'd never heard of a 30,000-mile transmission fluid change interval. That's extremely short. The only other thing I had them change was the cabin air filter because I heard it's difficult to access.

This new engine was assembled at the Valencia plant (like my old one) and this new engine's sticker reads 23C01, translating to Wednesday, March 1, 2023.
My old engine was dated Saturday, December 30, 2017 (17L30).

"I was told no break-in is required, but how can they tell me that if the engine is brand new? I still plan on following the break-in guidelines for the first 1,000 miles as stated in the manual."

I would consider an earlier oil change (1st on new engine) than recommended by the OWNERS MANUAL also. There will be engine break-in trash in the oiling system. Evey 5,000 mile intervals after that if a turbo.

"I also planned on getting the transmission fluid changed but I was told that shouldn't need to be done until 60,000 miles, unlike the 30,000 miles stated in the manual."

Here's the problem. This TRANS design has an non-serviceable filter (trans needs to be disassembled to get to it). This means contaminants and wear particles will accumulate in the sump (return fluid after coolers) and eventually plug the filter and damage the pump.

I would seriously consider the 30,000 mile interval. The drop and fill service replaces only four to five quarts in the trans so it (fluid) will always be somewhat compromised unless a flush service (not a machine reverse flush) is done (and an inline filter @ the outlet tube is installed - to prevent particulates from entering the trans case sump).

It all depends on how long you plan to keep the car.