Disagreements over evidence and backlogs in the state’s courts have made the lemon law slower and less effective, according to Consumer Attorneys of California, a supporter of the new legislation, AB1755 by Assembly Member Ash Kalra, D-San Jose. Under the bill, which is being unveiled Wednesday, a manufacturer that receives a notice from a customer about defects that have not been repaired in a reasonable time would have to agree within 30 days to repurchase or replace the vehicle, and to complete the transaction in another 30 days.