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What engines can fit a 02 Saturn SL1?

The 2002 Saturn SL1 came standard with a 1.9L Ecotec engine. While other engines *might* be physically *possible* to fit, it's a very complex and likely impractical undertaking. The wiring harness, computer, transmission, and mounting points are all specifically designed for that engine.

Swapping to a different engine would require extensive modifications, including:

* Engine Mounts: Fabricating or adapting new engine mounts.

* Transmission: Sourcing a compatible transmission.

* Wiring Harness: Significant rewiring or possibly a complete custom harness.

* Engine Control Unit (ECU): A compatible ECU and potentially tuning.

* Exhaust System: A new exhaust system would be needed.

* Driveshafts: Possibly needing modification or replacement.

While technically possible for someone with extensive mechanical knowledge and fabrication skills, it's generally not a cost-effective or practical modification. Sticking with a rebuilt or used 1.9L Ecotec is the most sensible and straightforward option for engine replacement in a 2002 Saturn SL1.