1998 Toyota Sienna service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.
What’s included
- Step-by-step repair procedures and service information
- Specifications, torque values, and reference data
- Electrical diagnostics with full wiring diagrams
- Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
- Diagnostic trouble codes and troubleshooting flow
- Maintenance schedules and fluid capacities
Trims covered
- CE
- LE
- XLE
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Maintenance & Lubrication
- Specifications
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Diagnostic Trouble Codes
- Technical Service Bulletins
- Wiring Diagrams
TOYOTA IS RECALLING CERTAIN MODEL YEAR 1998 THROUGH 2010 SIENNA PASSENGER VEHICLES MANUFACTURED BETWEEN AUGUST 7, 1997 AND JANUARY 4, 2010, CURRENTLY REGISTERED IN OR ORIGINALLY SOLD IN CONNECTICUT, D
THE CABLE MAY BREAK DUE TO EXCESSIVE CORROSION AND THE SPARE TIRE MAY SEPARATE FROM THE VEHICLE, POS
TOYOTA WILL NOTIFY OWNERS WITH AN INTERIM LETTER INITIALLY INSTRUCTING THEM TO BRING THEIR VEHICLE T
OBSOLETE NOTICE January 22, 2024: This bulletin is now obsolete. Please see T-SB-0057-18.
TSB: Replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) (see Figure 1) for most 1979 ? 2023 model year vehicles may be available provided the re
TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions
POL: This consolidated Tire Warranty Guide contains the complete warranty terms for all brands of ground and spare tires currently in use by Toyota. This information must be kept near the point of vehicle sale and be available to any custom
Product general information.
Replacement vin plates.
Toyota Safety Recall and Service Campaign - Technician Certification Requirements
TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
Showing the 8 most recent of 64 technical service bulletins on file with NHTSA.
WE WERE IN AN AUTOMOBILE ACCIDENT RECENTLY AND HAVE A QUESTION ABOUT NEEDING TO REPLACE THE SEAT BELTS AND POSSIBLY QUESTION OF MALFUNCTION OF AIRBAGS. OUR TOYOTA SIENNA VAN WAS GOING ABOUT 35 MPH AN
WE WERE IN AN AUTOMOBILE ACCIDENT RECENTLY AND HAVE A QUESTION ABOUT NEEDING TO REPLACE THE SEAT BELTS AND POSSIBLY QUESTION OF MALFUNCTION OF AIRBAGS. OUR TOYOTA SIENNA VAN WAS GOING ABOUT 35 MPH AN
DRIVER IN WRONG LANE HIT MY VAN, WITH MOST OF IMPACT ON RIGHT FRONT SIDE OF VAN. BOTH VEHICLES WERE TOTALLED IN COLLISION. RIGHT FRONT PASSENGER SEAT BELT INITIALLY HELD, BUT RELEASED DURING COLLISIO
DRIVER IN WRONG LANE HIT MY VAN, WITH MOST OF IMPACT ON RIGHT FRONT SIDE OF VAN. BOTH VEHICLES WERE TOTALLED IN COLLISION. RIGHT FRONT PASSENGER SEAT BELT INITIALLY HELD, BUT RELEASED DURING COLLISIO
AIR BAGS DID NOT DEPLOY IN A FRONT END COLLISION. WE WERE TRAVELING AT ABOUT 65MPH ON THE INTERSTATE WHEN ANOTHER VEHICLE LOST CONTROL, WRECKED, AND CAME TO A COMPLETE STOP IN OUR LANE AND FACING US.
Showing the 5 most serious of 352 complaints filed with NHTSA.
