2008 Toyota Sienna Q&A
2008 Toyota Sienna Question: Is this another Toyota Sienna manufacturer defect?
You would think that Toyota would manufacture a vehicle to survive the Western PA winter condition. Not so! My Sienna is 3 years and 2 months old with 43K miles. The A/C tubing (exposed part in the rear and beneath the vehicle) is already corroded. Dealership blames it on road salt and is asking for > $1,350 to replace the tubings, with no guarantee that it would survive more than 2-3 years. I am a mechanical engineer myself and consider this to be a costly design flaw. There is a history of corrosion with Toyota vehicles. Unfortunately, it is not going to cause a recall like the corroded spare tire cables or the rusted frame in other Toyota vehicles. But what a shame! The dealership staff has great pride of the brand and wants happy customers, but the product just does not live up to its reputation! - watsonk
i understand your frustration. first of all, i would not use the dealer for replacing the lines. i would look at a good shop to do this for you. after the repair, you should have the lines z- barted so the salt cannot attack the lines. it will probably double the life of the lines depending on your winters. i live in the philly area and we see tons of these issues with all manufacturers that have exposed tubing under the vehicle. i still consider Toyota tops for there product, too. thanks for using repairpal Roy - mastertech6371
Yes indeed, as Roy said -- not just Toyota has this issue. It's a fact of life, unfortunately. Being from the Pittsburgh area myself, I can tell you that PennDOT seems to be extra salt happy there...ha. Every vehicle my family has ever owned there has decayed, even with the best of undercoating intentions. Having moved out west, I nearly forgot about Ziebart! One other thought: Make sure when you get your car washed during the winter (which I recommend regularly, by the way), you go somewhere where they spray the undercarriage. Many of the automated washes in Pittsburgh, even, have an undercarriage wash as you drive in. It's vital that you do your best to clean off the corrosive materials. This may extend the life of your undercarriage, too, regardless of your vehicle manufacturer. Good luck! - DaveJHM