BBC chairman Sir Michael Lyons has been dragged into the row over plans to downgrade the broadcaster's presence in Birmingham.
MPs have urged him to intervene and ensure Radio WM continues transmitting all night. They condemned plans to cut off the channel at 10pm and replace it with programming from Nottingham.
A House of Commons motion urging Sir Michael - former chief executive of Birmingham City Council - to act was signed by nine MPs, including Khalid Mahmood (Lab Perry Barr), Siôn Simon (Lab Erdington), Richard Burden (Lab Northfield) and Lynne Jones (Lab Selly Oak).
It follows cuts by the BBC. Radio WM's daily output is set to end at 10pm and the Mailbox, the BBC's West Midlands headquarters, has already lost Radio 2 work.
Television drama production is also under threat, with the centre likely to become a news base.
The Commons motion said: "This House expresses deep concern over the decision by the BBC to stop transmitting Radio WM at 22.00 hours as of 31st March and introduce a feed from a remote station."
It calls on Sir Michael to "consider this issue with a view to maintaining the current end of transmission at 01.00 hours."
The BBC insists it remains committed to the West Midlands.
It produces programmes such as Gardeners' World, Around The World in 80 Gardens, Gardener Of The Year, Country-file, Desi DNA and Points Of View as well as regional news and current affairs, and is home to radio drama The Archers. The BBC says it has invested over £40 million in a new digital, state-of-the-art premises at the Mailbox.
However, Salford in Greater Manchester is due to become the BBC's major production centre outside London.
Sir Michael succeeded Michael Grade as chairman of the BBC Trust in April.
The former market trader was chief executive of Birmingham City Council from 1994 to 2001, and had been chief executive of Nottinghamshire County Council.