# Volvo S40 - Problems, Statistics, and Analysis

Volvo S40 owners have reported a total of 610 problems for their cars built in the
12 model years
listed in the chart below.
The chart shows the number of problems reported across all service years for each given model year of the Volvo S40.
The 2000 Volvo S40 cars have the most problems reported (161 problems).

### Table 1. Total number of problems by model year for Volvo S40

#### Common problems of Volvo S40

The following chart shows the 24 most common problems for Volvo S40 cars.
The number one most common problem is related to the vehicle's service brakes, hydraulic
(121 problems).
The second most common problem is related to the vehicle's electrical system (91 problems).

#### Table 2. Common problems of Volvo S40

#### Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Volvo S40 of an older model year to newer model years
since older vehicles have been in service longer and thus are expected to have more problems.
In order to compare the reliability across S40 model years, we use the PPMY index which is defined as the
*problems reported per thousand vehicles per Year*.
A smaller PPMY index indicates greater reliability of the given model year cars.

**PPMY = P / S / Y * 1000**,

where **P** = total problems reported during the life of a Volvo S40 model year;
**S** = total units sold of the model year; **Y** = years since the debut of the model year (the age of the vehicle).

The results are shown in Table 3.

### Table 3. Use PPMY Index to Compare Reliability Across S40 Model Years

S40 Model Year | Problems | Sales [1] |
Vehicle Age |
PPMY Index |

2004 |
70 | 11,418 | 13 |
0.47 |

2003 |
18 | 10,458 | 14 |
0.12 |

2002 |
33 | 13,840 | 15 |
0.16 |

2001 |
105 | 31,695 | 16 |
0.21 |

2000 |
161 | 28,316 | 17 |
0.33 |

#### Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Volvo S40
is to use the total number of problems reported during the vehicle's first year in service, as shown in the Table 4.

### Table 4. Number of problems in vehicle's; first service year

Model Year | Problems Reported |

2010 S40 |
1 |

2009 S40 |
1 |

2007 S40 |
4 |

2006 S40 |
6 |

2005 S40 |
13 |

2004 S40 |
6 |

2003 S40 |
5 |

2002 S40 |
3 |

2001 S40 |
16 |

2000 S40 |
21 |