Six teenagers have been arrested after a stolen luxury station wagon crashed on the West Gate Bridge in Melbourne.

Police said the BMW was carrying nine people when it veered right and hit a pole about 2:00am.

A female passenger was taken to hospital with critical injuries and is in a stable condition.

The station wagon was reported stolen from an address at Truganina in Melbourne's west on Thursday between 12:30pm and 1:30pm.

Gangs including Apex have targeted luxury cars in carjackings and break-ins in Melbourne in recent months.

Two families in Melbourne's north-west were terrorised by intruders earlier this week during early-morning home invasions targeting late-model cars.

A limited edition 2015 Holden Club Sport Anniversary and a grey Volkswagen coupe were stolen, but police said it was too early to link the breaks-in to gangs.

Victoria Police has been reluctant to link carjackings and car thefts to gangs and has warned against giving groups like Apex oxygen.