Originally Posted by k3vkoh
Dinan is one of the way to mod your bimmer and still keep the warranty. But keep in mind you'll pay a huge price premium over other mods which is pretty similar, but without the "Dinan" logo on it.
Below is what I found on Dinan's webpage. It doesn't sound like BMW will fix an engine if a Dinan mod has caused it to fail. Instead, Dinan is saying that a Dinan authorized dealer will fix your engine--meaning Dinan will assume manufacturer's warranty if one of its mods causes damage to itself and any other system in the car that would normally be covered under the manufacturer's warranty. That doesn't sound like a very straight-forward "drive it in, you are covered" process, and I bet it depends on the Dinan dealer's interpretation of what might be going on with your car, which can be a drag. Having said that, I have had no experience dealing with Dinan dealers, so who knows, maybe they are great...
"CARS COVERED BY THE ORIGINAL VEHICLE MANUFACTURER’S NEW CAR LIMITED WARRANTY.
US and Canadian Specification Vehicles Only
If your vehicle is currently covered by the vehicle manufacturer’s new car limited warranty, Dinan products are warranted for the remaining term of the vehicle manufacturer’s new car limited warranty. The manufacturer’s new car warranty is limited to 4 years or 50,000 miles (80,000 kilometers in Canada), commencing on the date of first retail sale or the date the vehicle is first placed in-service as a demonstrator or company vehicle, whichever is earlier. Dinan’s warranties are transferable when ownership of the vehicle into which the Dinan products were originally installed is sold.
To obtain service under this warranty, the vehicle must be brought, upon discovery of a malfunction or defect in materials and/or workmanship, to the workshop of any Authorized Dinan Dealer, during normal business hours. Proof of purchase in the form of a lawful invoice is required. The Authorized Dinan Dealer will, without charge for parts or labor, repair or replace the defective Dinan component(s), as well as any original vehicle manufacturer’s component(s) that may have been directly affected by a Dinan component, using new or authorized remanufactured parts. The decision to repair or replace said parts is at the sole discretion of Dinan and/or the original vehicle manufacturer. Parts for which replacements are supplied under this limited warranty become the property of Dinan and/or the original vehicle manufacturer. In all cases, a reasonable period of time must be allowed for warranty repairs to be completed after the vehicle is delivered to the Authorized Dinan Dealer."