2021 Toyota Redundant Sienna Service Brakes Problems

NHTSA component category: SERVICE BRAKES · data through 07/14/2026

80Service Brakes complaints

48.5%Of all 165 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How service brakes ranks on this vehicle

SERVICE BRAKES80 · 48.5%

Unspecified / other27 · 16.4%

SEATS17 · 10.3%

AIR BAGS16 · 9.7%

ELECTRICAL SYSTEM13 · 7.9%

Share of the 165 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 Toyota Redundant Sienna overview page.

What owners report

“Car lunges forward when braking. This occurs at low rates of speed and is particularly prone to occur when making right and left turns. This…”NHTSA complaint 11630015 — filed 12/11/2024

“This problem has been happening for a while now, over one year. When I am braking there is a jolt of acceleration. This happens frequently…”NHTSA complaint 11619685 — filed 10/14/2024

“When applying the brakes, at lower speeds around 20 MPH my Sienna lunges forward for a few seconds, increasing speeds. This is happening frequently in…”NHTSA complaint 11615984 — filed 09/23/2024

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Service Brakes complaints by year filed

Frequently asked questions

Does the 2021 Toyota Redundant Sienna have service brakes problems?

Service Brakes is the most-reported problem area on the 2021 Toyota Redundant Sienna: 80 of 165 complaints on file (48.5%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2021 Toyota Redundant Sienna have in total?

165 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 14 involved a crash, 3 involved a fire, 11 reported injuries, and none reported deaths.

What does NHTSA's service brakes category include?

NHTSA assigns each complaint to standard component categories; this page reports the SERVICE BRAKES category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/14/2026.