Who was the chief engineer for the fifth-generation Mustang?

Hau Thai-Tang was the chief engineer for the fifth-generation Mustang.

The fifth-generation Mustang, known internally as the S197, was developed for the 2005 model year and moved to Ford’s new D2C platform. Thai-Tang directed the engineering effort, bringing experience from Ford’s performance and motorsport programs, including work connected with IndyCar racing under Mario Andretti.

The S197 represented a major visual and engineering reset after the fourth-generation Mustang. It returned to a more muscular, retro-inspired shape while introducing a new platform, revised suspension systems, and updated engines. Production began at Ford’s Flat Rock Assembly Plant in Michigan.

J Mays is sometimes named in discussions of the car because he was Ford’s senior vice president of design and promoted the broader “retro-futurism” design language. Sid Ramnarace, however, was the exterior designer. Those design roles are distinct from Thai-Tang’s chief-engineer responsibility.