Lex will manage all contact with drivers, and servicing and new car orders will be booked online.
Aviva’s fleet department can also access real time reporting to monitor the outsourced fleet.
At the same time, Lex has signed a contract with Aviva subsidiary RAC worth £75m for it to provide breakdown, recovery and windscreen replacement services across its fleet of 258,000 vehicles.
The contract goes through to 2013 and in that time RAC anticipates handling around 600,000 calls from Lex drivers and attending around 360,000 breakdowns.
RAC AutoWindscreens will handle around 80,000 calls and fit around 60,000 windscreens to Lex vehicles over the six year contract period.
Lex managing director Jon Walden said: “Aviva and RAC are both committed to customer service and we are all working together to provide a world class service to company car drivers. The Aviva fleet is currently being implemented to go live in early 2008.
“Our relationship with RAC is now 16 years old and stronger than ever which is why we have committed to them as a supplier for the next six years,” he added.