2018 Toyota Sienna Engine Problems
- Complaints
- 5about this part
- Share
- 7%of 72 total for the year
- Median mileage
- 26,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine of the 2018 Toyota Sienna, 7% of the 72 complaints for this model year. Where a mileage was given, the median is 26,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Mobility works sold me a car,that had a recall,designed for special needs,they knew avout it plus the ramp wasnt working properly,made me pay for an expensive warranty that doesnt cover the problem that already has,they are blaming me for misuse I got it 4 months ago my son doesnt weight more than 100 pounds”
NHTSA complaint #11391084, filed 2021-02, 16,000 miles“The contact owns a 2018 Toyota Sienna. The contact stated while driving at an undisclosed speed, the vehicle jerked and lost motive power. In addition, the contact stated that on several occasions the vehicle shut off independently. The vehicle was taken to the dealer; however, the failure could not be duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. In addition, the contact stated that the vehicle was taken to the dealer several times due to the failure. The contact stated that the failure began in 2019 but had become a persistent failure. …”
NHTSA complaint #11613601, filed 2024-09Related service bulletins
- 11005119Jun 19, 2024This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
- 11005061Jun 19, 2024This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
- 10210370Mar 8, 2022TT: Some 2017-2022 Highlander, and 2017-2020 Sienna vehicles may experience an engine oil leak condition from the No.2 Oil pan. This issue is currently under investigation…
- 10179702Aug 7, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10179606Aug 7, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10177592Jun 12, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10177575Jun 1, 2020TT: The Toyota Quality group is looking to better understand our customers expectation regarding vehicle drivability. Specifically, we are looking at vehicle surge/hesitation…
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
- 10159730Apr 18, 2019Customer Support Program Bulletin: Toyota has received reports indicating potential symptoms, such as a whine noise from the transmission while driving, harsh shifting, reduced…
- 10159729Apr 18, 2019Dealer Packet: Toyota has received reports about potential symptoms, such as a whine noise from the transmission while driving, harsh shifting, reduced power, and master warning…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 5 | 4% |
| 2021 | 8 | 5% |
| 2020 | 6 | 16% |
| 2019 | 4 | 9% |
| 2018 | 5 | 7% |
| 2017 | 15 | 10% |
| 2016 | 4 | 5% |
| 2015 | 16 | 7% |
| 2014 | 11 | 7% |
| 2013 | 7 | 4% |
| 2012 | 9 | 4% |
| 2011 | 23 | 4% |
| 2010 | 5 | 3% |
| 2009 | 10 | 5% |
| 2008 | 39 | 9% |
| 2007 | 42 | 12% |
| 2006 | 11 | 1% |
| 2005 | 22 | 2% |
| 2004 | 13 | 1% |
| 2002 | 3 | 2% |
| 2001 | 2 | 1% |
| 2000 | 2 | 1% |
| 1998 | 1 | 0% |
Other parts of the 2018 Toyota Sienna
20 complaintsOther or unknown
14 complaintsFuel system
13 complaintsElectrical system
7 complaintsAir bags
5 complaintsBody and structure
5 complaintsVehicle speed control
5 complaintsSeats
4 complaintsBrakes
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsEquipment
1 complaintsExterior lighting
1 complaints
← All problems reported for the 2018 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology