Crankshaft Gear, 36 Teeth, PAI 171872 (OEM Ref 5273412), Pack of 1
Suggested Additional Parts
Commonly sold with this product. These parts are sold separately.
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181866Cummins THERMOSTAT KIT Ships from supplier · Lead time confirmed when you order -
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431376International / Navistar DT466E HEUI ENGINES SEALING RING Ships from supplier · Lead time confirmed when you order -
136105FRONT SEAL In stock -
441215International / Navistar RELIEF VALVE Ships from supplier · Lead time confirmed when you order
| Engine family | Cummins 4B / ISB 4.5 · Cummins ISB / QSB / 6B 5.9 / 6.7 |
| Brand | PAI Industries |
| Part Category | Crankshaft & Seals |
| Sub-Type | Crankshaft / Flywheel |
| Engine Make | Cummins |
| Engine Model | 4B · 6B |
Pack of 1.
PAI 171872 is a 36-tooth spur crankshaft gear. PAI describes steel construction and lists Cummins 4B 3.9 and 6B 5.9 applications. PAI lists OEM reference 5273412.
Compare the complete part number and listed specifications with your required part before ordering.
Fits:
- CUMMINS 4B ENGINES 3.9
- CUMMINS 6B ENGINES 5.9
Warranty: 24 months
These catalog references may identify this part or components in an assembly. A listed number alone does not confirm whole-assembly interchange or vehicle fitment. Confirm the required part before ordering.
| Number |
|---|
| PAI 171872 |
No cross-reference numbers match that search.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
Most PAI parts carry a 2-year unlimited-mileage PAI warranty — 3 years on the High Performance tier, 1 year on Excel by PAI. See Warranty & Returns for full coverage terms, or call a specialist to confirm the exact coverage on this part.
PAI published warranty tiers: High Performance — 3-Year · Genuine PAI — 2-Year · Excel — 1-Year, unlimited mileage. The badge beside the price shows this product's recorded term; when no badge is shown, confirm coverage with a specialist.





