* Body Styles: While generally similar, there were some minor styling changes throughout the YJ's production run (1987-1995). These may affect some exterior trim pieces.
* Engine/Drivetrain: While many engine and drivetrain components are interchangeable, there might be some minor variations, especially with sensors and computer modules. Always check part numbers to be sure. Different engine options were available in those years so this is a crucial check.
* Axles: Axle ratios and components might vary slightly.
* Interior: Some interior parts, particularly trim pieces and upholstery, might have minor design differences.
* Electrical Systems: While much is the same, there might be subtle differences in wiring harnesses or computer modules.
In short: While a large percentage of parts *are* interchangeable, it's crucial to verify part numbers before purchasing. Using a parts catalog that specifies the year and model (and even the specific engine) is vital to ensure compatibility. Don't rely solely on year alone.