Nissan's Part Number System
So, you're at a swap meet and a there's a guy selling a load of new old stock Nissan parts. But what model do they all belong to? How can you identify all those parts without having to remove each from it's box and have a look? ( and even that's no guarantee of correctly identifying the part!) The part number of course! Nissan's part numbers, as a rule consist of ten digits. They are usually written as two five digit codes separated by a space or hyphen. At first it must seem an incomprehensible system but look closer and you'll find that it's surprisingly simple. Here, I'll attempt to explain the system and give you some of the basic information necessary to "read" the numbers for yourself.
First of all you need to know the basics. That ten digit part number can be effectively split into four parts. Each of these parts tells you a little about the type of part and applied model. I'll use a typical Nissan part number as an example. Here we have a typical part number label, this one being for a Datsun 510 front turn signal lens...
This part number can be divided up into the four main parts as follows...
26 Section Number
121 Character Number
214 Part Type Number
00 Distinction Number
SECTION NUMBER
The first two digits of the first half of the number are referred to as the "Section Number". This will tell you the major function of the part. For example if the number was "10" it would be something to do with the engine...if it was "21" it would be something to do with the cooling system and so on. In our example here we have "26" which refers to electrical section #5 which covers lights both inside and out plus the horn. the section number is used in conjunction with the "Character number" explained below.
CHARACTER NUMBER
The next three digits are called the "Character Number" and show the minor classification within the major function shown by the Section Number. As I said, in our particular example the Section Number shows us that we have something for the 5th electrical section... the Character Number will tell us a little more. In this case the number "121" shows us that the part is to do with the external lights. This can be understood just from the fact that the number is in the 100 region...the actual number will identify the part very accurately but for general part identification this is not really necessary. I have compiled a table of the Section and Character numbers that you can use to identify parts. You can take a look at it HERE.
PART TYPE NUMBER
Third we have the most useful part of the number called the "Part Type Number". These three digits tell you what model the part fits. Although this is very useful it can't tell the whole story as it only tells you the primary application. I other words, that part might fit other or later models but the number will only list the original application. The knowledge of parts interchangeability only comes with experience and practice as that information is not widely available. What is available however is the original application codes. Nissan publish these code tables in parts catalogs, their purpose being to allow you to read the Part Type Number and cross reference it to a Nissan chassis code. If we take a look at our example, the Part Type Number is "214". This corresponds to the model L510, which is a LHD 1300cc 510 so we can gather that this is an early type lens as the 1300 (L13) model was one of the first produced. The fact that it lists LHD is, in this case irrelevant as it's the same for RHD. I have compiled a table of Part Type Numbers and their relative Nissan applications HERE, but this list only covers models up to 1974 as at this time I only have that information available to me. I have also excluded some of the commercial vehicle and bus codes for now as they were not sold in many export markets and I feel it unlikely that anybody will need them (of course if you would like them added please let me know!)
DISTINCTION NUMBER
Lastly we have the "Distinction Number" which is a two digit code used to identify the difference between similar parts, such as if a piece of upholstery is black or brown ...or if a different material or process is used in it manufacture. There are four main types of Distinction Number, shown in the table below. The distinction Number is not really needed in order to identify a part and like the Character Numbers, there are nearly hundred different ones to learn, all of which can vary from part to part.
Hopefully you will now have enough information to begin identifying part numbers and parts. There is of course, much more to learn about numbers but the basics are all you really need ...the rest will come with practice. Soon you'll be able to make an educated guess at what the part number for a particular part will be. That should surprise your Nissan dealer!
http://www.datsunownersclub.co.uk/
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