# 2011 Toyota Sienna - Problems, Statistics, and Analysis

## Common problems of the 2011 Toyota Sienna

629 problems have been reported for the 2011 Toyota Sienna.
The following chart shows the 24 most common problems for 2011 Toyota Sienna.
The number one most common problem is related to the vehicle's air bags
with 203 problems.
The second most common problem is related to the vehicle's structure
(107 problems).

### Table 1. Common problems of the 2011 Toyota Sienna

##
PPMY Index and Problem Occurrence Trend

In our research we use the PPMY index to compare the reliability of vehicles. The PPMY index of a certain model is defined as the *problems reported per thousand vehicles per Year*. The total sales of the 2011 Toyota Sienna in the United States are 187,467 units [1]. If the total number of problems reported by Toyota Sienna owners in the last 7 years is 629, and the age of the vehicle is 7, the PPMY index can then be calculated as

PPMY Index = 629 / 187,467 / 7 * 1000 = 0.48.

For more information, refer to this page: A study of reliability comparison across Toyota Sienna model year vehicles.

The following chart shows the number of problems reported during each of the service
years since the debut of the 2011 Toyota Sienna in 2011.

#### Table 2. PPMY Index and Problem Occurrence Trend

Service Year | Number of Problems |

2011 |
40 |

2012 |
35 |

2013 |
48 |

2014 |
56 |

2015 |
35 |

2016 |
235 |

2017 |
97 |

2018 |
0 |

##
Compare the 2011 Toyota Sienna with Other Model Years

When making the decision between buying a new or used Toyota Sienna,
the following table can be used to compare the 2011 Toyota Sienna
with the Toyota Sienna from other model years.
Note that the number of problems reported for the 2011 Sienna is 629
while the average number of problems reported for the 23 model years of the Toyota Sienna is 381.

### Table 3. Compare the 2011 Toyota Sienna with other model years