Numbers 1 and 2 in ATS indices 2112 and 1117: what do they mean and why is it important for car owners

If you have ever looked at the PTS or car registration certificate VAZ, then you probably paid attention to strange digital designations like 2112 or 1117. The first numbers are 1 or 2 are not just random symbols, but the key to understanding the history of the model, its technical features and even the compatibility of spare parts. For experienced car owners this is the ABC, but for beginners it can be difficult to understand.

Many people mistakenly think that these numbers indicate only a “generation” or “series” - in fact, everything goes deeper. For example, why VAZ-2112 starts with two, and VAZ-1117 - from one? The answer lies in the factory classification system, which has been formed over decades. Today we will not only decipher these indices, but also show how this information helps when buying spare parts, repairing or even choosing a used car.

Let us warn you right away: we are not talking about “fashionable” designations like Granta or Vesta, but about the classic factory numbering, which is still used in documents. It is she who determines which parts will fit your car and which will not.

Why are the first numbers 1 or 2: historical context

Car designation system VAZ dates back to Soviet times, when the plant in Togliatti was just starting to produce Zhiguli cars. The first digit in the index is nothing more than car class according to the plant’s internal classification. It is she who divides models into “families” with common technical solutions.

Digit 1 traditionally denoted cars classic layout (rear wheel drive), whereas 2 — front-wheel drive. This rule was established back in the 1970s, when VAZ-2101 (rear-wheel drive) and later VAZ-2108 (front-wheel drive) marked the beginning of two different branches of development.

• 🔹 1xxxx - rear-wheel drive models (VAZ-2101, 2107, 1111 "Oka")
• 🔹 2xxxx — front-wheel drive models (VAZ-2108, 2110, 2112, 2170 "Priora")
• 🔹 Exceptions: some models Niva (for example, VAZ-2121) also start with a two and have permanent all-wheel drive.

Interestingly, this system was maintained even after the collapse of the USSR. For example, VAZ-1117 (aka Lada Kalina station wagon) received one at the beginning of the index not because of rear-wheel drive (it is not there), but because it refers to family of small cars, which historically inherited this figure from Okie.

Decoding indexes 2112 and 1117: what the numbers hide

Now let's look at specific examples. Let's take VAZ-2112 - the popular "twelve". Its index is deciphered as follows:

1. 2 — front-wheel drive platform (family VAZ-2110).
2. 1 — car class (in this case, passenger car).
3. 12 — serial number of the model in the family (y VAZ-2110 —"10", y 2111 —"11", y 2112 —"12").

But VAZ-1117 (Kalina Universal):

1. 1 - family of small cars (legacy Okie, although front-wheel drive).
2. 1 — class (passenger).
3. 17 - serial number in the family Kalina (for example, 1118 - hatchback, 1119 - sedan).

It is important to note here that second digit "1" in both cases it denotes the passenger class, not the body type. The body is already coded in latest figures (for example, 21124 - this is 2112 with a 16-valve engine).

How does the index affect the choice of spare parts?

Knowing your car's index number is not an academic interest, but practical necessity. The fact is that even outwardly similar models can have fundamental differences in details. For example:

• 🔧 Suspension: U VAZ-2110 (index 2110) and VAZ-2112 (2112) identical levers, but different springs due to differences in body weight (hatchback vs sedan).
• 🔧 Engine: VAZ-1117 (1.6 l, 8 valves) and VAZ-21126 (1.6 l, 16 valves) have different cylinder heads, although the volume is the same.
• 🔧 Electrics: Wiring Kalina (1117) not compatible with Prioroy (2170), despite the external similarity.

To avoid making mistakes when purchasing, always check:

1. Full model index (for example, 21120-3701010 - generator for VAZ-2112 with a 16-valve engine).
2. Year of manufacture (even within the same model, details could change).
3. VIN code (it contains encrypted information about the configuration).

Specify the full model index (for example, 21124)

Check the year of manufacture of the car

Check the VIN for special trim levels

Compare part numbers -->

⚠️

Attention: Some sellers indicate simplified indices in their advertisements (for example, “spare parts for the 10th family”). This is fraught with errors - always ask for the exact catalog number!

Exceptions and peculiarities: when the rules don't work

As with any system, there are exceptions. For example:

• 🚗 VAZ-2121 "Niva" starts with a two, although it has permanent all-wheel drive. Here "2" does not mean a front-wheel drive platform, but off-road family.
• 🚗 VAZ-1111 "Oka" - the only model with the index "1xxx", which was front-wheel drive (a legacy of cooperation with Daihatsu).
• 🚗 Lada Granta (index 2190) and Lada Vesta (2180) returned to two, despite the fact that Kalina was "single". This is due to the transition to a new platform.

It is also worth remembering export modifications. For example, VAZ-2107 for the European market could have an index 21074, where the last digit indicated the configuration (in this case, an engine with an injector).

Index	Model	Drive	Features
2101	Zhiguli	Rear	The first VAZ model, copy Fiat 124
2108	Satellite	Front	The first front-wheel drive VAZ
1111	Oka	Front	Exception: front-wheel drive, but index with "1"
2121	Niva	Full	"2" denotes off-road family, not drive type
1117	Kalina Universal	Front	Legacy of small car classification

⚠️

Attention: If you see an index starting with 3 (for example, VAZ-2131), this means modification with extended base (like Niva in version 2131). Such models require a special approach when selecting spare parts!

How to find out your car's index number

If you don't know your machine's index number, you can find it in several places:

1. PTS (vehicle passport) - line "Model, make of vehicle."
2. Certificate of Registration - point "3. Make, model of vehicle."
3. Body plate - usually located under the hood or on the driver's door pillar.
4. VIN code — the first three characters (WMI) may contain information about the model.

For example, the PTS may indicate:

Model, vehicle make: LADA 211200-20 (VAZ-2112)

Here 2112 - this is the base index, and 211200-20 — modification (in this case, a hatchback body with a 16-valve engine).

If the document is not at hand, you can use online services using the VIN code, for example:

• 🌐 Vinform
• 🌐 Autocode

What to do if the index in the documents does not match the plate on the body?

This may indicate a re-equipment of the car (for example, engine replacement) or a registration error. In this case:

1. Check the VIN code through the traffic police (service "Vehicle history check").

2. Check the data with the nameplate - it has legal force.

3. If the discrepancies are critical (for example, a different body type), contact the traffic police to clarify the data in the PTS.

Practical application: how knowing the index saves money

Understanding indexes helps to avoid mistakes during repairs. For example:

• 💰 Buying used spare parts: The seller can write “parts from tens”, but if your car is VAZ-2112 with a 16-valve engine, and parts are sold from 2110 with 8-valve, they may not fit.
• 🔧 Selection of analogues: Knowing the index, you can find compatible parts from other models. For example, a steering rack from VAZ-2110 also suitable for VAZ-2112, but not for Kalina (1117).
• 📈 Selling a car: It is better to indicate the full index in the advertisement (for example, VAZ-21124) to attract more interested buyers.

Let's consider a specific case: you need to buy starter for VAZ-1117. The store offers two options:

• Starter for VAZ-2110 (index 2110-3708010).
• Starter for VAZ-1118 (index 1118-3708010).

Despite their superficial similarity, these starters not interchangeable due to different mounts and drive gears. Knowing your car's index number (1117) will tell you that you need the second option (or its analogue for 1118, since Kalina often unified in different bodies).

Frequent mistakes car owners make when working with indexes

Even experienced drivers sometimes make mistakes. Here are the most common:

• ❌ Ignoring last digits: For example, they think that everyone VAZ-2110 the same though 21102 and 21104 have different engines.
• ❌ Confusion with export modifications: For example, VAZ-21073 (with carburetor) and VAZ-21074 (with an injector) are identical in appearance, but the spare parts for them are different.
• ❌ Trust in "folk" names: Phrases like “part from dozens” or “spare part from Kalina” are too vague. Always check the index!

To avoid problems, follow a simple rule:

“If the indices do not match at least in the first four digits, the part will not fit with 90% probability.”

The only exceptions are standardized parts (for example, some light bulbs or windshield wipers), but even here it is better to be safe.

FAQ: Answers to frequently asked questions

Is it possible to install parts from VAZ-2110 on VAZ-2112?

Partially. Many body parts (eg doors, bumpers) and suspension components are interchangeable, but engines, electrical components and some transmission components may differ. Always check the part numbers.

Why do Kalina does the index start with "1" if it is front wheel drive?

This is a legacy of the classification of small cars, which has been carried out since Soviet times. VAZ-1117 belongs to the family Kalina, which was initially positioned as a successor Okie (index 1111).

How to decrypt the index VAZ-21126?

Explanation:

• 2 — front-wheel drive platform.
• 1 — class (passenger car).
• 12 — model in the family (hatchback).
• 6 — modification with a 16-valve 1.6 l engine (Euro-3).

Where can I find the part number according to the vehicle index?

Use official directories:

• 📖 Partsouq (international catalogue).
• 📖 EXIST (Russian equivalent).
• 📖 Official Lada website (section "Spare parts").

Enter your model index (for example, 21124) and select the desired category (engine, suspension, etc.).

What to do if the documents contain an incomplete index (for example, just VAZ-2112)?

In this case:

1. Check the year of manufacture - this will help determine the modification.
2. Look at the plate under the hood - there may be a complete index there (for example, 21120-20).
3. If in doubt, contact your dealership Lada with VIN code - they will provide accurate data.