Try VinSnap →

99.8% Accuracy — Here's How

Traditional dropdown parts searches achieve only 70-80% accuracy, causing 35% of parts to be returned. VinSnap achieves 99.8% accuracy using your VIN and TecDoc's professional database.

See It In Action →
✓ VIN-Based Filtering ✓ TecDoc Database ✓ 998 of 1,000 Parts Fit

VinSnap Fitment Accuracy

99.8%
998 of 1,000 parts matched correctly

The Parts Fitment Problem

35% of auto parts purchases result in returns. Why? Because traditional dropdown searches miss critical details that affect compatibility.

What Affects Fitment Dropdown Searches Detect? VinSnap Detects?
Year, Make, Model ✓ Yes ✓ Yes
Trim Level (EX vs EX-L) ✗ No ✓ Yes
Engine Options (2.0L vs 2.5L) ✗ Manual selection ✓ Automatic
Transmission Type ✗ Manual selection ✓ Automatic
Drivetrain (FWD/AWD) ✗ Not detected ✓ Yes
Optional Packages ✗ Not detected ✓ Yes
Production Date Changes ✗ Not detected ✓ Yes
Regional Variations ✗ Not detected ✓ Yes

Real-World Example: Why Dropdown Searches Fail

Scenario: Buying Brake Rotors for a 2021 Honda Accord

Dropdown Search Process:

  1. Select: 2021 → Honda → Accord
  2. Choose engine: 1.5L Turbo or 2.0L Turbo? (User might guess wrong)
  3. Choose trim: LX, Sport, EX, EX-L, Touring? (Many don't know their trim)
  4. Result: Shows rotors for ALL trims, many incompatible

Problem: The EX and EX-L trims have different brake rotor sizes. If you select wrong = wrong part.

VinSnap Solution:

Enter your VIN once. VinSnap knows: 2021 Honda Accord EX-L, 2.0L Turbo, 10-speed automatic, FWD. Shows ONLY rotors for the EX-L trim. 99.8% accuracy.

How VinSnap Achieves 99.8% Accuracy

🔍

Step 1: VIN Decoding

VinSnap decodes your 17-character VIN to reveal 100+ specifications including trim level, engine type, transmission, drivetrain, optional packages, and production date.

📊

Step 2: TecDoc Database

VinSnap uses TecDoc, a professional-grade database with 1.2 million parts and detailed fitment data. Used by mechanics and dealerships worldwide for 99.8% accuracy.

🎯

Step 3: Precise Filtering

VinSnap filters all search results to match your exact vehicle configuration. Parts are matched down to trim packages, optional equipment, and production date changes.

What is TecDoc?

TecDoc is the industry-standard automotive database used by professional mechanics, dealerships, and auto parts manufacturers worldwide.

1.2 Million Parts

TecDoc catalogs over 1.2 million auto parts from 600+ manufacturers with detailed fitment specifications for every compatible vehicle.

Professional-Grade Data

Unlike consumer parts databases, TecDoc includes trim-level variations, optional packages, production date changes, and regional differences.

Continuously Updated

TecDoc is updated monthly with new parts and fitment data. VinSnap syncs with TecDoc to ensure you always get the latest compatibility information.

VinSnap vs Traditional Parts Sites

Feature VinSnap RockAuto / AutoZone
Fitment Accuracy 99.8% 70-80%
Return Rate <1% 35%
Search Method VIN-based automatic Manual dropdown selection
Detects Trim Packages Automatic User must know/select
Detects Optional Equipment Yes No
Database Source TecDoc (professional) Generic consumer database
User Error Rate Near zero (VIN is exact) High (manual selection)

Frequently Asked Questions

What is parts fitment accuracy?
Parts fitment accuracy measures how often a parts search system recommends parts that actually fit your vehicle. VinSnap achieves 99.8% accuracy (998 of 1,000 parts fit correctly). Traditional dropdown searches achieve only 70-80% accuracy, causing 35% of auto parts purchases to be returned.
Why is VIN better than year/make/model for parts?
VINs reveal exact vehicle specifications that year/make/model dropdown searches miss: Trim level (EX vs EX-L), Engine options (2.0L vs 2.5L), Transmission type (CVT vs 10-speed automatic), Drivetrain (FWD vs AWD), Optional packages (Sport package, Technology package), Production date changes. These details affect which parts fit, but dropdown searches can't detect them.
What is the TecDoc database?
TecDoc is a professional-grade automotive database used by mechanics and dealerships worldwide. It contains 1.2 million parts with detailed fitment data down to trim packages and production dates. VinSnap uses TecDoc for parts compatibility matching, achieving 99.8% accuracy versus 70-80% for consumer dropdown searches.
How does VinSnap handle trim packages and options?
VinSnap decodes your VIN to reveal your exact trim level and optional packages. Example: A 2021 Honda Accord EX-L has different brake rotors than the base EX model. Your VIN tells us which trim you have. VinSnap filters parts to match your specific configuration, eliminating wrong parts from search results entirely.
What if my part still doesn't fit?
With 99.8% accuracy, fitment issues are extremely rare (less than 0.2%, or 2 in 1,000 parts). If a VinSnap-recommended part doesn't fit, contact support immediately. We investigate every fitment issue, update our TecDoc database if needed, and help you find the correct part at no additional cost.
How does VinSnap compare to RockAuto or AutoZone?
VinSnap uses VIN-based filtering with 99.8% accuracy. RockAuto and AutoZone use dropdown year/make/model selection with 70-80% accuracy. VinSnap automatically detects trim packages and options. RockAuto/AutoZone require you to manually select engine, transmission, etc., leading to user error. VinSnap return rate: <1%. Traditional sites: 35%.
Does VinSnap work for all vehicle types?
VinSnap works for all vehicles manufactured after 1981 (when 17-character VINs became standard). This includes cars, trucks, SUVs, and commercial vehicles from all major manufacturers: Ford, Chevrolet, Toyota, Honda, Nissan, BMW, Mercedes-Benz, and 50+ more brands.
What if I have a modified or custom vehicle?
VinSnap shows parts for your vehicle's original factory configuration based on VIN. If you've modified the engine, suspension, or other systems, parts recommendations will be for stock components. For modified vehicles, we recommend consulting a specialist or providing modification details to our support team for manual part recommendations.

Experience 99.8% Accuracy

Try VinSnap's parts search with your VIN. See exactly which parts fit your vehicle.

Try VinSnap Now →