The costs (parts and labor) for replacing timing belt in 1992 Saturn.
Cost to replace timing belt on 1992 Saturn SC
Looks like your Saturn only came with a timing chain
The model number is J30t - was not an option in the drop down listing.
I think you have a 1993 Infinity J30 and you can check the timing belt replacement price here www.repairpal.com/estimator
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about 700-900 depending on which parts and labor rate. Parts needed; Timing chain, camshaft sprocket, guides, tensionor, crankshaft sprocket, oil pump plate, sealer, oil filer and oil. Dealership used to sell this as a kit. I beleive labor time was about 4-5 hours, most techs did job in under hour.