The German manufacturer has made the Andretti FE entry its full works programme in the electric championship for the 2018/19 season after entering into a technical partnership with the team for the 2017/18 campaign.
Da Costa has retained his place at the outfit where he has raced since season three, while Sims will make his FE racing debut after previously working on the team’s development programme.
Roger Griffiths will remain as team principal after its transition from Andretti to the BMW works outfit, which revealed the look of its Gen2 iFE.18 at the BMW Welt exhibition centre in Munich.
“It’s amazing, it’s a really important day for me,” said da Costa. “I’ve been in Formula E since day one, the first time the teams got their cars and we went for a shakedown in the rain at Donington.
“To see this come alive today – this has always been the plan. I’ve worked really hard to be here today, as a BMW factory driver.
“I think we’ve got a really good package, the combination between BMW and Andretti – we’ve been working really well the last two years, building up to this moment.”
Sims said: “I couldn’t ask for a better teammate in Antonio, we’ve know each other for quite a few years now and had the pleasure of working together in BMW racecars before, so to continue that relationship is going to be good fun.
“[For my] expectations of the year ahead, honestly, as a rookie going into such a difficult and high-level race series I’m optimistic obviously but honestly I understand the challenges ahead.
“I’ve got very little experience compared to some of the guys that have been in since day one and so there’s going to be a lot of learning ahead, but [I’m] thoroughly looking forward to it and trying to get on top of things in the difficult world of Formula E.”