Module 2, Lesson 5


Approximate time to complete this lesson: 30 minutes

Lesson 5 Video

To begin Lesson 5, watch this video (6 minutes, 6 seconds).

Review of Lesson 5

How to Code Parts

In addition to assigning a letter grade to a part – A, B, or C – we also want to communicate any damage the part may contain. Providing a damage code will help the repair facility estimate how much repair time will be required. Again, a unit of damage does not necessarily equal one hour – which is a common but often inaccurate method of grading parts.

Let’s learn how to grade a part using some specific examples.

Example #1: a quarter panel with a small parking lot ding. How would you code it?



Parking lot ding above the wheel well.


Measure the damage area using the location chart (in this case the damage is located in area 5).
Indicate the type of damage observed. In this case P for Parking lot Ding. Next, determine how many units of damage there are (e.g. how many credit cards does it take to cover the damaged area? In this case, 1. So, in our example provided we would assign a code of 5D1 to this part. This part is then an A grade part with a Damage code of 5D1.

Example #2:


Dent in the top, forward area of the quarter panel.


Example #3:


Large dent on quarter panel above fuel filler door.


In the above example, there is a large dent above the fuel filler door. That is location # 4. The surface area of the damage exceeds two standard sized credit cards, so the damage code for this quarter panel would be 4D3 and it would be considered a C Grade, or NIQ part.

Primary and Secondary Damage

There are two types of damage: primary and secondary.
A part with secondary damage may still be viable but will require a secondary damage report with a secondary code.

Here are some examples:


Use the ARA Damage Location Chart to determine the location codes for the rust spots. There is one in the bottom left area below the name badge and another smaller one above the handle.


This rust spot is the larger of the two, but it can be covered by one standard sized credit card. The Damage Type code for rust is “R” and the location code is “6”, so the primary damage code for the tailgate is 6R1.


The secondary damage, also a rust spot that can be covered by a single credit card, is in location 2. So the secondary damage code is 2R1. The tailgate damage code is 6R1, 2R1.


Here we have another example – a truck quarter panel with a large scrape around the wheel well and a dent below the tail lamp.


The scrape (Damage Code “S”) is in location #5 and is larger than 2 credit cards, so the primary damage code for the panel is 5S3.


The dent in Location # 4 can be covered by 1 credit card, so the secondary damage code is 4D1. The panel has a damage code of 5S3, 4D1.


Let’s look at some other examples A, B & C Parts along with their Damage Codes.


A Grade Quarter Panel and since there is no visual damage to this part the assigned damage code will be 000.


Here is an A grade part truck box side with an assigned damage code of 5R1.


Here is a B grade with a damage code of 5R2.


Here is a of a B grade part with a damage code of 6E2.


Another B grade part with a code of 6D2.


A C grade part with a code of 7R3.


Here is another example of a C grade part with a damage code of 5R3.


Continue with Module 2, Lesson 6