Paramjeet Kaur, 26, was charged with conspiracy to commit misconduct in a public office with her husband Raza Khan and his lover, ex-police officer Sugra Hanif.
Khan and Hanif were found guilty on Thursday at Winchester Crown Court.
Hanif, a former Thames Valley Police officer, would access her work computer and note the personal details of members of the public involved in road accidents, the trial heard earlier.
The jury heard the conspiracy, which began in January 2011, could have netted the trio more than 1 million pound.
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Khan and Kaur claimed they did not know the data was illegal.
Judge Barnett told Hanif and Khan they faced "substantial custodial sentences" when they are sentenced on March 7.
Judge Andrew Barnett gave the Crown Prosecution Service a week to consider a retrial request for Kaur.