One problem related to brake abs warning light has been reported for the 1998 Toyota Sienna. The most recently reported issues are listed below.
The motor acutator for the abs system was found to be defective as indicated by a abs warning light. The dealer said the item was not covered under the warranty and the cost to repair was $1300. 00 for part and $300. 00 for labor. The dealer indicated that I would have no abs on the vehicle but that it was safe to drive. I spoke with a service representative named mark. I think that the abs system is a safety device and should be fixed by the manufacturer. I am seriously concerned that if this system decides to malufundtion because of a defective part that the vehicles brakes could be affected causing a serious wreck and putting my family in harms way.