On some peterbilt trucks, certain parts used in the air suspensions have a high copper content causing premature failure.
Suspension
Peterbilt 340 Suspension problems by year
0 complaints filed with NHTSA about the Peterbilt 340's suspension. Broken springs, struts, control arms, ball joints, noises and alignment that won't hold.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data