I’ve been researching options for upgrading my car, and reconditioned BMW engines keep coming up as a popular choice. From what I’ve seen, they can offer almost-new performance at a fraction of the cost of a brand-new engine — as long as you buy from a trusted supplier.

The key is checking the warranty, the quality of parts used, and the reputation of the rebuild shop. I’m curious if anyone here has installed a reconditioned BMW engine recently. How was the performance and reliability? Any tips on where to source them without risking knock-offs would be super helpful.