Quentin Willson was the presenter of beloved motoring programmes Britain's Worst Driver, Fifth Gear, and the original incarnation of Top Gear.
Willson was a regular guest on LBC to discuss motoring.
In a statement, the family described Willson, who died on Saturday, as a “true national treasure”, who “brought the joy of motoring, from combustion to electric, into our living rooms”.
The statement said: “The family of Quentin Willson, television presenter and producer, motoring journalist, author, and campaigner, wish to announce that he passed away peacefully surrounded by his family on Saturday 8th November, following a short battle with lung cancer. He was 68.
“A true national treasure, Quentin brought the joy of motoring, from combustion to electric, into our living rooms.
“He helped shape the original Top Gear as one of its first hosts, working alongside Jeremy Clarkson and the team who took the pioneering show global.
"He went on to front Fifth Gear and still holds the dubious honour of Strictly Come Dancing's lowest score in history.
"Through his FairFuel campaign, Quentin saved UK consumers a fortune by helping to freeze fuel duty. Over £100 billion in fresh taxation was prevented by the campaign, a real consumer win by a true consumer champion.
"He also created and presented much-loved programmes such as Britain's Worst Drivers and The Cars the Star.
"Long before it was fashionable, he championed the GM EV1 and the promise of electric cars, proving he was always ahead of the curve.
"More recently he had worked tirelessly to make EVs affordable for all, via his FairCharge campaign.
"Much-loved husband to Michaela, devoted father to Mercedes, Max and Mini, and cherished grandfather to Saskia, Xander & Roxana. Quentin will be deeply missed by his family, friends, and all who knew him personally and professionally.
"While messages of condolence are warmly appreciated, the family asks that their privacy be respected at this difficult time.
"Funeral arrangements will be announced in due course.
"The void he has left can never be filled. His knowledge was not just learned but lived; a library of experience now beyond our reach."
Chris Goffey, motoring journalist and former Top Gear presenter, paid tribute to his former colleague.
He told LBC's Vanessa Feltz: "Quentin was such a very bright man. He was from a very intellectual background. His father, was a professor, and was one of the first Bletchley Park codebreakers.
"He told us when he was 11 he drove his father's American car across the Texas desert and took great, great delight in that. Quentin was very well informed, a very, very bright guy and great fun to work with. "He was a great classic car enthusiast.
"He loved his bright red Jensen Interceptor that he thought was wonderful and he used to tell us about his Daimler SP250
"Dart that he said he would never ever part with. I don't know if he was still driving it towards the end of his days, but he always assured us that his background was in buying what he called 'wacky cars' and doing them up and selling them at a profit. He did that.
"He told me his first car was a Frogeye Sprite that he bought for a pittance and made it look beautiful and then sold for a profit."
