[AlanD]

Bought my 2024 Prime last month. At final paper signing salesman tried to sell me an "Auto Saver Electronic Rust Protection System" that plugs in to the OBD II port. Started at $900+, then as a "final" offer dropped it to $495. Said I would research it and get back to him. Found same one on EBay for $235.

Did some research and most seem to think Cathodic protection rust protection works on submerged metal like boats or pipelines. Could NOT find any qualified authority (Car & Driver, CNet, Consumer Reports, Road & Track, etc) who has done any research on the topic.

I'm a born-in-the-wool skeptic, and this seems like the perfect P.T.Barnum snake oil. Anyone found any rigorous or scientific analysis on the device/method of rust protection other than anecdotal stories? I'd love to be proven wrong and have a relatively inexpensive, easy to install method of rust protection, but if it is so great why isn't Toyota (and other manufacturers) using the technology as OEM?

Don’t buy the electronic rust control module. A few decades ago, it was at dealerships in Canada and I believe it was proven inaccurate in it‘s claims so the governing body had it removed. It has come back to some of our dealership the past several years.

Stick with a thicker annual oil spray. In Canada I switched to Corrosion Free in 2020 after using RustChek then Krown for about 30 years previously. I’ve read several great things about Fluid Film also but it is just not widely available in Canada Unless I want to buy spray cans and do it myself.