| Nissan Switched to iron calipers in 1992. So 1992+ models have iron and 1990-1991 have aluminum. I got this info from FAQ's under the model changes linkL '92: Driver's airbag made standard. Brake caliper material changed from aluminum to iron, to help warpage/shimmy problems. Dash/door complimentary material changed from fabric to suede. Separate mirror heater switch eliminated (combined with rear defroster switch) Mirror heaters made standard. Power adjustable driver's seat standard on T-top. Sales: 6,708
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