Elon Musk’s Tesla Inc. is at loggerheads with a Swedish labor union demanding the right to negotiate pay deals on behalf of its local employees. While the dispute centers on an estimated 120 to 130 staff in Tesla repair shops, it’s affecting the wider business as workers in other sectors strike to disrupt the electric-car maker’s operations in support of their colleagues. Some new Teslas aren’t being assigned license plates, others can’t be unloaded at ports and some Tesla components aren’t being produced. The company has appealed to the country’s courts to break the deadlock.

1. Why are Tesla’s service-shop …