* Amperage: The new alternator must have the same or higher amperage rating as the original. Using a lower amperage alternator could overload it and cause premature failure. Check your original alternator for its amperage rating.
* Physical Dimensions and Mounting: The alternator's physical size, mounting holes, and pulley diameter must be compatible with your Neon's mounting bracket. Even if the amperage is correct, a different year alternator might not physically fit.
* Electrical Connections: The wiring harness connectors must match. While many alternators use standard connectors, there's a chance a different year might have different connectors requiring modification or adapter harnesses.
In short: It's risky to assume compatibility without careful comparison. You need to find the exact specifications (amperage, dimensions, connector type) of *both* your original alternator and the potential replacement. Cross-referencing parts numbers with a reliable auto parts store's online catalog (like AutoZone, Advance Auto Parts, etc.) is the safest method. Searching for the exact part number from your original alternator is highly recommended. Using the year, make, and model of your Neon in their online search tool will give you the correct specifications.
Don't just rely on the year; focus on the *specifications*.
