Lincoln Zephyr - Problems, Statistics, and Analysis

Lincoln Zephyr owners have reported a total of 236 problems for their cars built in the 5 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 Lincoln Zephyr. The 2006 Lincoln Zephyr cars have the most problems reported (222 problems).

Table 1. Total number of problems by model year for Lincoln Zephyr

Model Year Number of Problems
  2011 Zephyr
1
  2008 Zephyr
7
  2007 Zephyr
5
  2006 Zephyr
222
  2003 Zephyr
1

  Common problems of Lincoln Zephyr

The following chart shows the 19 most common problems for Lincoln Zephyr cars. The number one most common problem is related to the vehicle's air bags (140 problems). The second most common problem is related to the vehicle's wheels (27 problems).

Table 2. Common problems of Lincoln Zephyr

Problem Category Number of Problems
  Air Bag
140
  Wheel
27
  Engine And Engine Cooling
10
  Electrical System
9
  Equipment
9
  Power Train
8
  Structure
8
  Vehicle Speed Control
4
  Seats
3
  Latches/locks/linkage
3
   
  Service Brakes
2
  Tire
2
  Steering
2
  Electronic Stability Control
2
  Suspension
2
  Other Fuel System
2
  Visibility
1
  Exterior Lighting
1
  Unknown Or Other
1

  Compare Reliability Across Model Years Using PPMY Index

It would not be fair to compare the Lincoln Zephyr 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 Zephyr 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 Lincoln Zephyr 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 Zephyr Model Years

Zephyr
Model Year
Problems Sales [1] Vehicle
Age
PPMY Index
  2006 22231,38913    
0.54

  Number of Problems Reported During the First Year

Another way to measure the reliability across the model years of the Lincoln Zephyr 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
  2006 Zephyr
5


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