Some 2018-2019 Toyota Camry, 2017-2019 Highlander and Sienna, and 2016-2019 Tacoma vehicles may exhibit a knocking noise from the vacuum pump with the engine idling. If confirmed, replace the vacuum pump assembly.
New replacement vacuum pumps are available as follows:
PREVIOUS P/N NEW P/N MODEL
29300-0P010 29300-0P030 Camry, Highlander, Sienna
29300-0P011 29300-0P030 Camry, Highlander, Sienna
29300-0P020 29300-0P040 Tacoma
29300-0P021 29300-0P040 Tacoma