The Most Deteriorated Car Model

We search our database for car models that have the worst trend in reliability improvement. Toyota Corolla came out on top of our list.

Drastic increase in total number of problems reported

Table 1 shows the total number of problems reported for Toyota Corolla vehicles built from 1996 to 2018. Notice that the number of problems reported has increased greatly from 2000 to 2010.

Table 1. Total number of problems reported for Toyota Corolla since 1996

Model Year Number of Problems
2017 Toyota Corolla
62
2016 Toyota Corolla
92
2015 Toyota Corolla
143
2014 Toyota Corolla
180
2013 Toyota Corolla
176
2012 Toyota Corolla
429
2011 Toyota Corolla
627
2010 Toyota Corolla
1,454
2009 Toyota Corolla
1,661
2008 Toyota Corolla
350
2007 Toyota Corolla
895
2006 Toyota Corolla
898
2005 Toyota Corolla
888
2004 Toyota Corolla
525
2003 Toyota Corolla
796
2002 Toyota Corolla
138
2001 Toyota Corolla
156
2000 Toyota Corolla
169
1999 Toyota Corolla
183
1998 Toyota Corolla
268
1997 Toyota Corolla
145
1996 Toyota Corolla
149

Most deteriorated in new car reliability

In order to better compare reliability across production years, we use the number of problems reported during the vehicles first year in service. The result for Toyota brand vehicles is show in Table 2. Table 2 shows the number of problems in the first service year of Toyota vehicles built from 1996 to 2018. Notice that from 2003 to 2010 the new car reliability of Toyota vehicles has deteriorated greatly.

Table 2. Number of problems in the first service year

Model Year Number of Problems
2017 Toyota Corolla
49
2016 Toyota Corolla
36
2015 Toyota Corolla
73
2014 Toyota Corolla
61
2013 Toyota Corolla
47
2012 Toyota Corolla
44
2011 Toyota Corolla
89
2010 Toyota Corolla
498
2009 Toyota Corolla
354
2008 Toyota Corolla
41
2007 Toyota Corolla
64
2006 Toyota Corolla
44
2005 Toyota Corolla
46
2004 Toyota Corolla
47
2003 Toyota Corolla
86
2002 Toyota Corolla
19
2001 Toyota Corolla
24
2000 Toyota Corolla
19
1999 Toyota Corolla
23
1998 Toyota Corolla
39
1997 Toyota Corolla
19
1996 Toyota Corolla
35

Check out other articles about car brands and models that have made the most progress (or most deteriorated):

The most improved car brand
The most improved car model
The most deteriorated car brand
The most deteriorated car model