2021 Toyota redundant SIENNA
Problems, Recalls & Reliability Report
Quick Summary
The 2021 Toyota redundant SIENNA has 223 owner complaints filed with NHTSA — that's 1.0x the segment average of 223. The most common issue is brakes problems (36% of all complaints), specifically: van has just over 5k miles. multiple warnings occurred while at speed on a highway. primary warning was 'low brake power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. this extreme braking is hazardous and could result in an accident caused by braking t. ⚠️ 4 fire reports filed.
223
Total Complaints
0
Recalls Issued
—/5
Safety Stars
1.0x
vs Segment Avg
Known Problems(top 5 of 8)
BRAKES
80 complaints- • Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'Low Brake Power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking t
- • We were driving down the freeway when we got rear ended hard by a large pickup. Then we lost electrical and engine power. The brakes stopped working. The hazard lights stopped working. Luckily we were able to coast to a complete stop as there was no way to stop the car. The police came and took a re
- • After the vehicle has been parked for a while (>1 hour in my experience), upon startup, when reversing down a hill, the brakes give the following intermittent (maybe one out of four start ups) problematic behavior. When releasing the brake pressure gradually, the car will not move, until suddenly it
“Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'Low Brake Power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking t”
— NHTSA complaint filing
When Problems Appear on the 2021 Toyota redundant SIENNA
Based on 12 owner complaints that included an odometer reading. Median mileage at time of complaint: 28K miles. Most complaints cluster in the 0-30K miles range.
Mileage figures are self-reported by owners in NHTSA complaint filings. Peak bucket = the mileage range with the most complaints for that component; it reflects when owners noticed and reported problems, not necessarily when the fault first occurred.
Estimated Insurance Cost for 2021 Toyota redundant SIENNA
How this estimate is calculated
Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.
Maintenance & Warranty
Recommended Toyota redundant SIENNA Service Intervals
0W-20 synthetic oil recommended. ToyotaCare covers first 2 years / 25K miles of scheduled maintenance for new vehicles. Hybrid battery: 10 yr / 150K miles warranty.
"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.
Toyota New-Vehicle Warranty Coverage
Hybrid battery is 10yr/150K miles for 2020+ hybrids. ToyotaCare (2yr/25K miles complimentary maintenance) is included.
These are the terms for a new Toyota. If you're buying a used 2021 redundant SIENNA, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Toyota dealer for VIN-specific remaining warranty.
Estimated Repair Costs
Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.
🔍 Pre-Purchase Inspection Checklist
Based on 223 owner complaints for this specific year, here's what to check or ask about:
- ☐BRAKES: Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'Low Brake Power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking t
Typically appears around 50K miles. Repair cost ~$500
- ☐OTHER: A lot Wind noise coming from driver side window and windshield at freeway speed. Report to Toyota service department but nothing was done to resolve the problem
Typically appears around 50K miles. Repair cost ~$500
- ☐SEATS/RESTRAINTS: When the 3rd-row folding seats are down and stored and the breaks are applied suddenly the seat will release and attempt to return a nonstored position. I had a box of water on top of the seat to keep it from moving. Unfortunately when I breaked the box moved and the seat left the stored position
Typically appears around 50K miles. Repair cost ~$500
- ☐AIR BAGS: Keep in mind: BRAND NEW SIENNA!!! 1. What component or system failed or malfunctioned, and is it available for inspection upon request? -The main and MOST important component was the ENTIRE airbag system which displayed "malfunctioned" ONLY AFTER the collision. The TPCS (Toyota Pre-Collision System
Typically appears around 50K miles. Repair cost ~$500
- ☐General: Get a pre-purchase inspection from an independent mechanic ($100-$200)
Toyota redundant SIENNA — Year Comparison
How does 2021 compare to other years? Fewer complaints = more reliable.
Full years-to-avoid analysis →NHTSA Safety Rating
No NHTSA safety rating available
At a Glance
- Complaints
- 223
- Recalls
- 0
- Fire reports
- 4
- Crash reports
- 18
- Injury reports
- 13
- Segment avg
- 223
Check a Specific VIN
See recalls for YOUR 2021 Toyota redundant SIENNA