"How reliable is the 1999 Toyota Sienna?"

"Based on 250 NHTSA complaints, the 1999 Toyota Sienna has a median complaint mileage of 91000 miles. The most common issue is STRUCTURE:BODY:DOOR."

"What are common problems with the 1999 Toyota Sienna?"

"The most frequently reported component in NHTSA complaints for the 1999 Toyota Sienna is STRUCTURE:BODY:DOOR, accounting for a significant portion of the 250 total complaints filed."

1999 Toyota Sienna: Reliability Data

Source: NHTSA — 250 complaints

250

Total Complaints

91,000mi

Median Mileage

STRUCTURE:BODY:DOOR

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

61,000 25th Percentile

91,000 Median Mileage

121,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

STRUCTURE:BODY:DOOR

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

TIRES

UNKNOWN OR OTHER

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

STEERING: STEERING WHEEL/HANDLE BAR

TIRES:TREAD/BELT

ENGINE AND ENGINE COOLING:ENGINE

SUSPENSION:FRONT

ENGINE AND ENGINE COOLING

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"VEHICLE PULLS TO THE RIGHT, HAS BEEN REALIGNED BUT CONTINUES TO PULL."

"AIR BAGS ARE MY COMPLAINT. I JUST PURCHSED A NEW TOYOTA VAN WITH AIR BAGS. WE HAVE 4 CHILDREN UNDER 9 YEARS OF AGE AND WE CAR POOL. THE FRON SEAT IS USELESS DUE TO THE AIRBAG. NO TOYOTA DEALER IN S.C. WILL INSTALL AN ON/OFF SWITCH DUE TO LIABILITY CONCERNS. I LIVE IN COLUMBIA S.C. NO ONE IN COLUMB..."

"THE POWER SLIDING DOOR IS DANGEROUS TO SMALL CHILDREN. IT REQUIRES TO MUCH PRESSURE TO STOP IF SOMETHING IS IN ITS WAY WHILE CLOSING. I HAVE TO DISABLE THE POWER DOOR WHICH LEAVES THE DOOR VIRTUALLY IMPOSSIBLE FOR ME TO USE NOW. ALL THEY NEED TO DO IS TO PUT A LIGHT SENSOR THAT WILL NOT ALLOW T..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28