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Caterpillar (CAT) Replacement Parts

Aftermarket replacement parts compatible with Caterpillar equipment and engines.

Up to 100% OFF Selected Parts

6,226 products in stock

Showing 1–48

Seal Kits3764Bearing, Gear & Shaft3318Starter Motor2959Air Filter2881Turbocharger & Kit2754Overhaul Kits2278Other Engine Parts2141Water Pump2060Alternator1959Overhaul Gasket1911Injectors & Nozzle1720Fuel Filter1688Transmission Parts1658Hydraulic Pump1637

Caterpillar (CAT) Replacement Parts

Keep your Caterpillar fleet running at peak performance with Moz Auto Parts's extensive catalog of aftermarket CAT-compatible parts. Our components are cross-referenced against genuine CAT part numbers for guaranteed compatibility.

Frequently asked questions

Do you carry parts for older Caterpillar models?

Yes — our catalog covers a wide range of Caterpillar models from current production back to legacy machines. If you don't find your specific part, use our Quote Request tool and our specialists will source it from our extended network.

How do Caterpillar part numbers work?

CAT uses a numeric part numbering system (e.g., 3E-7985, 125-2988). The number before the hyphen indicates the part family. Our search engine recognizes both hyphenated and non-hyphenated formats, so you can search either way.