Regarding Tesla, any time there is uncertainty in the marketplace, it causes concerns for suppliers," said Julie Fream, the chief executive of the Original Equipment Suppliers Association, which sent the survey in the past few weeks--a period that encompassed Tesla's second-quarter earnings and Mr. Musk's announcement on Twitter that Tesla had secured funding for a plan to go private . "The current dialogue about Tesla 'going private,' the wellpublicized Model 3 manufacturing ramp-up challenges, as well as recently reported contentious purchasing tacticsraise concerns for our members