Four problems related to suspension have been reported for the 2008 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Toyota Sienna based on all problems reported for the 2008 Sienna.
Vehicle would engage brakes by itself and vsc and traction control lights would start flashing and beeping when going around curves or hitting bumps in the road. This was frightening, and caused me to not in good conscience sell the vehicle outright to another person, so I lost thousands of dollars by trading it in. This happened intermittently for over a year. Estimated financial loss $4000. 00.
Both front springs broke. Part of the left front spring contacted the tire, damaging it. If vehicle was driven it would have ripped the sidewall and could have resulted in a crash. This was preceded by a clanking noise while driving.
Detroit axle, in michigan, is selling defective struts, straight out of the junkyard, and rack and pinion steering and many other suspension parts, advertised as new, by just placing a coat of paint in them. They offer a warranty of one year in the products, but the consumer must pay for the removal and installation of the part. I played their game for three times and I foolishly paid 3 times for the strut installation, plus other damages the faulty struts caused me . The faulty struts caused my frame to loosen, my horizontal drive shaft to damage, and rack and pinion steering, that detroit axle sold. Well, my vehicle shakes violently at between 45-55 miles per hour, thus having to pull to the side of the road. I managed to drive to a mechanic through back roads at low speeds. The defective rack and pinion steering and the defective, sold as new parts, and advertised as new parts failed in three occasions ane damaging my other parts of the vehicle. It cost me over $3000 to replace those parts plus the money that I gave to detroit axle, with the collusion of ebay selling his products. Once the parts are received, within 60 days, he closes the feedback on his page, thus not letting the suspecting public complain against his junkyard of defective parts. Ebay protects him. I still have to replace my michelin new tires for more expense and the third pair of struts are still on the vehicle, in which I still have to replace for a third time!.
Suspension coil springs break at very low mileages (around 40k or 50k mileages) impairing ride, steering and braking making the vehicle unsafe to drive. Besides the suspension coil springs corroding, there seems to a larger problem of the entire underbody corroding with the Toyota Siennas.