2011 Toyota Prius Owners Manual - Page 454
2011 Toyota Prius Manual
Page 454 highlights
4-3. Do-it-yourself maintenance NOTICE n If you remove the air cleaner filter Driving with the air cleaner filter removed may cause excessive engine wear due to dirt in the air. Also a backfire could cause a fire in the engine compartment. 4 Maintenance and care 431 PRIUS_U (OM47685U) DVD