For several months now, reports have circulated in comment sections and forum threads about a possible defect in Tesla’s vehicles that may cause suspension control arms to break. Many of those reports appeared to come from a single, highly-motivated and potentially unreliable source, a fact which led many to dismiss them as crankery. But as more reports of suspension failure in Teslas have come in, Daily Kanban has investigated the matter and can now report on this deeply troubling issue.
Our investigation began in earnest upon reading a thread titled “Suspension Problem on Model S” in the Tesla Motors Club forum. The original poster (OP) in that thread described the suspension in his 2013 Model S (with 70,000 miles) failing at relatively low speed, saying the “left front hub assembly separated from the upper control arm.” Images of the broken suspension components showed high levels of rust in the steel ball joint and the OP reported being told by Tesla service center employees that the “ball joint bolt was loose and caused the wear,” which was “not normal.” Because his Tesla was out of warranty, the repair was reportedly sent to Tesla management for consideration.
According to a subsequent post by the OP, Tesla management refused to repair the broken suspension under warranty despite the “not normal” levels of wear reported by the service techs. Then, just days later, the OP reported that Tesla had offered to pay 50% of the $3,100 repair bill in exchange for his signature on a “Goodwill Agreement” which he subsequently posted here (a scan of the stock agreement can be found here). That agreement included the following passage: