[mose121]

Let's be clear, the only people who have the legal power to void your warranty is BMWNA. No dealer can void your warranty. All they can do is call BMW and report their findings, which really never happens. It's too much of a PITA for dealers to take the time to mess around with that stuff. There's too much grey area and it's not making them any money to argue over your warranty. If anything dealers can refuse service just like any other business can to limit their liability. That hardly means your warranty is void. But they do have to be careful because as the "administrator" of BMWNA's warranty they are required to fix defective parts under warranty. So they don't want to get in hot water by refusing legitimate warranty repairs either. Which is why unless you've done something crazy like supercharged a N/A car or something like that they usually just do the repair and move on. I've been in the car business for 15 years and worked for several high line dealers. I was with BMW for almost 9 years and now manage a Porsche dealer service department. I have never in my 15 years seen a manufacturer void a warranty with the exception of cars that were totalled/salvage titles. I was the Dinan Performance Specialist at the BMW dealer and have been an enthusiast myself modding cars for many years. I will tell you from my experience that Dinan's quality and customer service is second to none. They also design, test, and manufacture most of their components themselves where as most other companies farm everything out and slap their name on it. We sold one of the first carbon fiber air intake kits for an e60 550i to a client. He had an intermittent rough idle on cold starts and the CEL would come on. In just a few days Dinan had traced it back to the way air was flowing inside the intake tubes causing turbulence and reducing air flow under very specific conditions. They 3D printed a new prototype (this was in 2006!!!), over nighted it to me, installed the next day and verified it fixed the issue, then Dinan had a brand new redesigned carbon fiber part in my hands two days later. Steve Dinan called my client personally to apologize for the inconvenience without any urging from us to do so. Then they sent him a complete suspension kit that retails for almost $3,000 for free. I don't know another tuning company on the planet that could have physically achieved that level of support and customer service let alone cared enough to do so. Dinan lost a couple grand but they made the client a customer for life. I've dealt with many companies over the years and some of them won't even talk to you. Any issues that people try to attribute to Dinan are almost never on Dinan's end and are usually a result of the dealer/service advisor not knowing how to properly handle the situation and nothing more. As usual, the Service Advisor will make or break your experience so it's important to choose wisely or ask the manager who you should deal with. In the end you get what you pay for and that's not just the tangible product you can hold in your hands. Sure we can complain about the higher cost but it is certainly justifiable in every way. As far as maintenance goes, it's free money for the dealer. They would be fools not to just do the service and modifications should have nothing to do with it. The warranty and maintenance "contracts" are two separate agreements so mods shouldn't effect anything on the maintenance side.