After reading all the online posts about the Nissan Quest ECM rusting and leading to possible failure, I decided to do some preventative maintenance work this weekend. Most of the people said the repair can be in the $3000 range if done at a dealer. I also read that the ECM should be covered under the 8 years emissions warranty but many are reporting that Nissan is refusing to pay for it because the warranty does not cover rust. After pulling the ECM out and inspecting the location of unit, I am pretty sure that if you live in an area with lots of rain/snow/salt, your ECM will eventually rust and fail. The reason for this is the ECM is installed directly under the windshield plastic cowl. The open mesh on the cowl will drain all the water DIRECTLY onto the ECM. With the way this thing is designed, you might as well duct tape the ECM on top of your hood because it gets drenched with whatever pours down onto your car.
nissan, quest, 2004, 2005, 2006, 2007, 2008, 2009, ecm, rust, rusting, repair, maintenance, broken, corrosion, corroded