Since bottoming out during the pandemic, loan defaults and delinquencies remain scarce by historical standards.
Regulators say the bank double-dipped on fees for customers with insufficient funds in their accounts.
The loan-to-value ratios could be foreshadowing higher delinquencies ahead.
More consumers could be left without vehicle-financing options.
Citigroup's increase was the biggest, with 17,000 employees added last year.
Some of Wall Street's largest banks have already fired staff or announced plans to do so.
Almost 16% of consumers who financed a new car in the fourth quarter have monthly payments reaching that level.
Struggling patients are being “lured” in by deferred-interest offers, the senators said.
At the five biggest US banks, revenue from dealmaking and sales of new securities tumbled 47% in the first nine months of 2022.
Serious card delinquencies are expected to climb to 2.6% at the end of next year from 2.1% at 2022's end.