April 26 (Reuters) - Michelin's sales returned to growth in January-March, boosted by a sharp rebound in demand in China, the French tire maker said on Monday.

First-quarter sales rose 2.3% year-on-year to 5.45 billion euros ($6.58 billion) as tire volumes for new passenger cars and light trucks surged 80% in China, with replacement rates up 36%.

The demand in China rose close to 2019 levels, Michelin said, as the carmaking industry there suffered less from a shortage of electronic components than other markets.

"Despite the disruptions from the COVID-19 pandemic and a certain amount of disorganization in the supply chain, Michelin delivered a robust performance in a first quarter shaped by an upturn in global demand," Chief Executive Florent Menegaux said in a statement.

Michelin kept its guidance for 2021 adjusted operating income of more than 2.5 billion euros, and free cash flow of 1 billion euros, in what it described as a "highly uncertain" environment.

The tire maker said the passenger car and light truck tire markets were expected to grow 6%-10% in 2021, with the truck tire market growing 4%-8%.

($1 = 0.8280 euros) (Reporting by Boleslaw Lasocki in Gdansk. Editing by Susan Fenton and Mark Potter)