2003 Toyota Prius - Problems, Statistics, and Analysis

🔎 Common problems of the 2003 Toyota Prius

121 problems have been reported for the 2003 Toyota Prius. The following chart shows the 17 most common problems for 2003 Toyota Prius. The number one most common problem is related to the vehicle's steering with 41 problems. The second most common problem is related to the vehicle's service brakes, hydraulic (16 problems).

Table 1. Common problems of the 2003 Toyota Prius

Problem Category	Number of Problems
Steering	41
Service Brakes	16
Electrical System	13
Tire	11
Engine And Engine Cooling	10
Power Train	6
Equipment	5
Vehicle Speed Control	5
Other Fuel System	3
Suspension	2
Unknown Or Other	2
Electronic Stability Control	2
Seats	1
Structure	1
Exterior Lighting	1
Air Bag	1
Gasoline Fuel System	1

📈 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 2003 Toyota Prius in the United States are 13,827 units [1]. If the total number of problems reported by Toyota Prius owners in the last 19 years is 121, and the age of the vehicle is 19, the PPMY index can then be calculated as

PPMY Index = 121 / 13,827 / 19 * 1000 = 0.46.

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

The following chart shows the number of problems reported during each of the service years since the debut of the 2003 Toyota Prius in 2003.

Table 2. PPMY Index and Problem Occurrence Trend

Service Year	Number of Problems
2022	1
2021	0
2020	2
2019	1
2018	1
2017	3
2016	1
2015	1
2014	7
2013	7
2012	3
2011	10
2010	18
2009	12
2008	10
2007	7
2006	6
2005	11
2004	7
2003	2

📊 Compare the 2003 Toyota Prius with Other Model Years

When making the decision between buying a new or used Toyota Prius, the following table can be used to compare the 2003 Toyota Prius with the Toyota Prius from other model years. Note that the number of problems reported for the 2003 Prius is 121 while the average number of problems reported for the 23 model years of the Toyota Prius is 638.

Table 3. Compare the 2003 Toyota Prius with other model years

Model Year	Number of Problems
2022 Prius	8
2021 Prius	4
2020 Prius	11
2019 Prius	22
2018 Prius	41
2017 Prius	130
2016 Prius	204
2015 Prius	161
2014 Prius	271
2013 Prius	430
2012 Prius	646
2011 Prius	517
2010 Prius	3,232
2009 Prius	596
2008 Prius	1,825
2007 Prius	2,394
2006 Prius	1,653
2005 Prius	1,271
2004 Prius	732
2003 Prius	121
2002 Prius	200
2001 Prius	213
2000 Prius	4

Switch Model Year:

★ Safety Ratings of Prius Cars

✿ Fuel Economy of Prius Vehicles

☘ Prius Service Bulletins

⚑ Prius Safety Recalls

☤ Prius Defect Investigations