Volvo S40 - Problems, Statistics, and Analysis

Volvo S40 owners have reported a total of 640 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 (164 problems).

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

Model Year Number of Problems
  2011 S40
5
  2010 S40
3
  2009 S40
12
  2008 S40
23
  2007 S40
32
  2006 S40
71
  2005 S40
93
  2004 S40
74
  2003 S40
22
  2002 S40
34
  2001 S40
107
  2000 S40
164

  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 (122 problems). The second most common problem is related to the vehicle's electrical system (96 problems).

Table 2. Common problems of Volvo S40

Problem Category Number of Problems
  Service Brakes
122
  Electrical System
96
  Engine And Engine Cooling
72
  Vehicle Speed Control
47
  Air Bag
37
  Visibility
30
  Exterior Lighting
27
  Suspension
25
  Power Train
24
  Equipment
23
   
  Other Fuel System
21
  Gasoline Fuel System
21
  Structure
18
  Steering
16
  Seat Belt
15
  Unknown Or Other
11
  Seats
8
  Wheel
8
  Tire
7
  Latches/locks/linkage
4
  Electronic Stability Control
4
  Air Brake
2
  Traction Control System
1
  Parking Brake
1

  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 7411,41815    
0.43
  2003 2210,45816    
0.13
  2002 3413,84017    
0.14
  2001 10731,69518    
0.19
  2000 16428,31619    
0.30

  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 YearProblems 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


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