BRUSSELS, Belgium (AP) _ The European Union Commission said Friday it has restarted its antitrust investigation of Cendant Corp.'s $3.3 billion purchase of online travel system Galileo International Inc.

The Commission now has four weeks to clear the deal or refer it for an in-depth, four-month investigation.

The Commission suspended its initial probe Aug. 2, just days before it was due to rule on the case, because it said Cendant hadn't supplied it with sufficient information on its European car rental business.

Cendant said the Commission had asked to clarify the relationship between its Avis unit, Avis Global Holding Inc., and Avis Europe Plc, which Cendant says is a separate, independently owned company.

The deal is also facing renewed scrutiny in the United States.

Competitors worry the deal could leave the door open to ``screen-based bias'' where Cendant units, such as its car rental business Avis or its hotel chains _ could be highlighted on travel reservation screens at the expense of others companies.

They also argue the deal also would grant Cendant access to commercially sensitive information about competitors.

Cendant chief executive Henry Silverman has said the charges are unfounded and that the online system won't be biased in favor of Cendant.

In an Aug. 2 statement, he said he expected the deal to be completed by the third quarter of 2001 as planned.

New-York based Cendant's travel brands include Avis and hotel chains like Ramada Inn and Howard Johnson. Galileo, based in Rosemont, Illinois, is No. 2 in online travel bookings after industry leader Sabre Inc. of Fort Worth, Texas.