Cadillac Deville - Problems, Statistics, and Analysis

Cadillac Deville owners have reported a total of 1,988 problems for their cars built in the
10 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 Cadillac Deville.
The 1997 Cadillac Deville cars have the most problems reported (258 problems).

Table 1. Total number of problems by model year for Cadillac Deville

The following chart shows the 26 most common problems for Cadillac Deville cars.
The number one most common problem is related to the vehicle's electrical system
(351 problems).
The second most common problem is related to the vehicle's engine and engine cooling (341 problems).

Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Cadillac Deville 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 Deville 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 Cadillac Deville 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 Deville Model Years

Another way to measure the reliability across the model years of the Cadillac Deville
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