Aftermarket direct-replacement parts for Western Star trucks (5700XE and more) — what we stock, how the model families differ, and how to verify fitment by VIN or cross-reference before you buy.
Western Star models we stock parts for
PartStop carries premium-quality aftermarket direct replacements for Western Star trucks including 5700XE, 4900, 4700, 49X, 47X, 57X — running Detroit DD13 / DD15 / DD16 power (Daimler). Every part ships from Tacoma, WA the same business day when ordered before the daily cutoff, with free standard shipping on orders over $100 and a 6+ month warranty.
Know your model family before ordering
Western Star builds the heavy end of the market — logging, oilfield, heavy-haul and severe vocational trucks. The classic 4900 has been in production for decades, and the new X-Series (49X/47X/57X) took over from 2020 on. Body and lighting parts follow those families.
As a Daimler brand, Western Star shares Detroit engines and many chassis components with Freightliner — cross-reference numbers often land on the same part. Our catalog search matches those numbers directly.
Three ways to guarantee the right fit
- VIN search: paste your Western Star VIN into the catalog search — you get the decoded truck plus only the parts verified to fit that build.
- Cross-reference number: search the number stamped on your old part; our listings match by verified cross-references, not photos.
- Call us: (253) 600-1351 with the VIN and part number — we confirm fitment before you pay. Wrong-part returns waste a week; a 2-minute check doesn't.
Popular Western Star categories
Browse everything that fits Western Star in one click, or jump to the categories Western Star owners order most.
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Premium-quality aftermarket direct replacements — nationwide same-day shipping, 6+ month warranty.