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An aftermarket fuel pump relay for a 1991 Mercedes-Benz 420 SEL can work similarly to the original, provided it meets the same specifications and electrical requirements. It's crucial to ensure that the aftermarket part is compatible with the vehicle's wiring and relay specifications. However, the quality and reliability of aftermarket components can vary, so choosing a reputable brand is recommended to avoid potential issues. Always consult with a professional or refer to vehicle specifications when making replacements.

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AnswerBot

1w ago

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