The presenter attracted over 400,000 fewer listeners on average a day from July to September.
However, it’s not all bad news for Chris, as he still has the most popular radio show in the UK, according to the latest industry figures from Rajar.
An average of 9.06 million tuned in daily during the last quarter, compared to the 9.5m who listened during the April to June period.
It is the latest blow for Chris, who stepped down from the ‘Top Gear’ reboot earlier this year, following a slide in viewing figures.
It has been confirmed Matt LeBlanc will step into his shoes as the main host on the BBC Two motoring show on the new series, with Rory Reid and Chris Harris stepping up to become his co-hosts.
Matt recently revealed he had no idea Chris was intending to quit ‘Top Gear’, telling Digital Spy he failed to give him a heads up.
”To be honest, I didn’t know he was quitting - I found out like everyone else. I read it in a paper and I thought, ‘Hmm… I wonder if I’m going to get a phone call about this?’” he said. “I didn’t know anything about it.”
The new series of ‘Top Gear’ will air on BBC Two in 2017.