Police say all the vehicles were taken using the owners' keys after the crooks broke into homes they targeted solely to steal the vehicles.
Five cars, including a BMW, have been taken in the past eight weeks in Robroyston, in the north east of the city.
In one incident a Mitsubishi Shogun 4x4, worth £36,000, was taken from outside a property. Four other thefts have occurred in the same way, including a £25,000 BMW 520 and a £10,000, Audi A6.
A Volvo Polo and an Audi A4 were also stolen using the owners' keys.
A spokeswoman for Strathclyde Police said: "All the cars have been taken using the true keys.
"They may have managed to get in a door that wasn't locked.
"We're urging drivers to remain vigilant and keep keys out of sight."
A message on Twitter from police in Spring-burn also urged homeowners to keep keys hidden.
AA research shows that in recent years there has been an increase in the number of cars stolen from driveways using the owners' keys.
They say a common tactic for thieves is to take keys off hall tables or from convenient key racks near the door, simply by 'fishing' for them with a pole through the letterbox. It can be some time before the family indoors realises the car has gone.
In August the Evening Times revealed how gym users in Glasgow and South Lanarkshire were being targeted by car thieves.
Four drivers were targeted by crooks who followed car owners into the gym, then broke into their lockers.
In one incident a 26-year-old from Glasgow's South Side had her BMW stolen from outside Bellahouston Leisure Centre.