E39Source, LLC 301 Enterprise Street, Escondido, CA 92029

"I’ve had the pleasure working with Ryan at E39 source on both my E39 M5 and E46 M3. His craftsmanship is next to none! He is the best in the business. He will take care of your car like his own and that is priceless. His ability to rejuvenate your car is like a time machine going back in time. I could’ve easily taken my car to my local BMW dealer, which is less than five minutes away, but I’d rather ship my car to him any day of the week as I know he will get it done right the first time with great attention to detail. Thank you, Ryan."

"I hardly write reviews but Ryan and his team deserve a 10 star! I've been using him for years. 2002 E39 M5 and 2013 E92 M3! When it comes to M performance cars Ryan and his team are unmatched. I'm so fortunate to have found him. They go above and beyond every time! Know the cars inside and out and I'm always excited to send my cars for service, rejuvenation and/or restoration. I know I'm in good hands and my cars get the attention and time they deserve. There are many secondary BMW shops that claim they know but no one has in my experience come close to this elite group. Your attention to detail, dedication and more importantly passion for these cars shows every time!"

"If you own an M car, especially an E39 or E60 M5, E39Source is the shop for you. Not only is their founder, Ryan Schultz, incredibly knowledgeable, but the entire staff is truly outstanding with communication, attention to detail, and customer care. I am VERY picky about who works on my cars, and E39Source is genuinely the only shop I truly trust to work on my M5, especially with complex jobs, like my most recent timing chain guide/engine front end rebuild. They're not inexpensive, and services can take time, but that's to be expected from a meticulous shop that places an emphasis on making sure things are done right — and that's E39Source. If you truly value the best service from the best speciality BMW M independent in Southern California, look no further — you've found the shop."

"I cannot say enough great things about E39 Source. Unbelievably knowledgeable, easy to work with, and extremely communicative. It's clear the love they have for these cars and their quality of work really shows it. This is who you want working on your BMW. I've had my car worked on by them a few times now and each time has been an overly positive experience. Truly the best shop and the best people. They really care. Cannot recommend highly enough"

"I cannot say enough good about Ryan and his business, E39 source. So happy with his expertise and ability to treat a car correctly. He is the foremost in knowledge about all things related to the e39 m5. I had him do a PPI and then work on my recent purchase to get it in tip top shape. Not only is he knowledgeable, but he is fairly priced and that makes the decision easy to take your precious m5 to him and nobody else! Thank you Ryan. It was a pleasure doing business with you!"