The most deteriorated car brand

We search our database for car brands that have the worst trend in reliability improvement. Toyota 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 all models of Toyota vehicles built from 1996 to 2018. Notice that the problems reported have increased greatly from 2000 to 2010.

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

Model Year Number of Problems
1996 Toyota vehicles
1,604
1997 Toyota vehicles
1,669
1998 Toyota vehicles
2,312
1999 Toyota vehicles
2,048
2000 Toyota vehicles
3,746
2001 Toyota vehicles
3,668
2002 Toyota vehicles
4,957
2003 Toyota vehicles
5,487
2004 Toyota vehicles
7,312
2005 Toyota vehicles
7,465
2006 Toyota vehicles
8,321
2007 Toyota vehicles
11,242
2008 Toyota vehicles
6,814
2009 Toyota vehicles
5,599
2010 Toyota vehicles
6,509
2011 Toyota vehicles
3,112
2012 Toyota vehicles
2,466
2013 Toyota vehicles
1,462
2014 Toyota vehicles
1,087
2015 Toyota vehicles
858
2016 Toyota vehicles
799
2017 Toyota vehicles
399
2018 Toyota vehicles
89

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 in recent years the new car reliability of Toyota vehicles has deteriorated greatly.

Table 2. Number of problems in the first service year for all model years of Toyota vehicles

Vehicle Year Number of Problems
1996 Toyota vehicles
308
1997 Toyota vehicles
143
1998 Toyota vehicles
354
1999 Toyota vehicles
239
2000 Toyota vehicles
399
2001 Toyota vehicles
354
2002 Toyota vehicles
428
2003 Toyota vehicles
557
2004 Toyota vehicles
710
2005 Toyota vehicles
741
2006 Toyota vehicles
708
2007 Toyota vehicles
1045
2008 Toyota vehicles
591
2009 Toyota vehicles
1062
2010 Toyota vehicles
2225
2011 Toyota vehicles
439
2012 Toyota vehicles
360
2013 Toyota vehicles
446
2014 Toyota vehicles
348
2015 Toyota vehicles
341
2016 Toyota vehicles
367
2017 Toyota vehicles
325
2018 Toyota vehicles
53

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