# Kenworth W900 Used Price & Common Problems | Big Rig Risk

> Kenworth W900: used $59,950 to $209,950. Documented problems: EGR Cooler (Cummins ISX15) and transmission synchros. What to inspect before you buy.

**Verdict:** inspect

$59,950–$209,950 observed used across 6 comps, and price tracks mileage. High-mile (455k–655k) trucks land $89k–$175k, low-mile late units $175k–$230k. The W900 shell is sold across many engine specs, so buy on the specific engine (ISX15 / legacy C15) and driveline, not the badge.

**Observed used price:** $59,950–$209,950

**Documented failure risks:**
- Fuel Injectors (Cummins ISX15, common W900 spec): ISX15 injectors fail by sticking open (white smoke, rough idle) or sticking closed (misfires, power loss); commonly spec'd engine in W900 conventional trucks.
- EGR Cooler (Cummins ISX15): EGR cooler cracks internally and mixes coolant with exhaust gas, producing white smoke and coolant loss with no visible external leak.
- Injectors (legacy Caterpillar C15, common older W900 spec): Older W900s were commonly spec'd with Cat C15/C13 engines; HEUI injector sets are expensive to replace and vulnerable to contaminated fuel.
- Transmission synchros: Eaton Fuller manuals common in W900 spec sheets develop hard shifting and jump-out-of-gear faults at high mileage.

## Sources
- [skylinerrepaircenter.com (failure evidence)](https://skylinerrepaircenter.com/blog/cummins-isx15-engine-problems-a-mechanic-s-perspective) (accessed 2026-09-05)
- [skylinerrepaircenter.com (failure evidence)](https://skylinerrepaircenter.com/blog/caterpillar-truck-engines-legacy-maintenance-guide) (accessed 2026-09-05)
- [skylinerrepaircenter.com (failure evidence)](https://skylinerrepaircenter.com/blog/eaton-fuller-transmission-problems-and-solutions) (accessed 2026-09-05)
- [soarr.com W900 dealer inventory (auto-refresh watch: publishes when 3+ real used listings appear)](https://www.soarr.com/for-sale/trucks/0/Kenworth/W900/all-for-sale) (accessed 2026-09-05)
- [NHTSA recall 21V080000 (ENGINE)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=21V080000) — "PACCAR Incorporated (PACCAR) is recalling certain 2021-2022 Kenworth T680, T880, W990, T800, W900 and Peterbilt 579, 567, 389, 367 vehicles equipped with a Cummins X15 engine.  The capscrews that attach the flywheel to the crankshaft may have been improperly torqued, allowing the flywheel to detach." (accessed 2026-09-11)
- [NHTSA recall 24V145000 (SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=24V145000) — "PACCAR Incorporated (PACCAR) is recalling certain 2009-2021 Kenworth C500, 2012-2021 Kenworth T440, 2009-2015 Kenworth T660, 2015-2024 Kenworth T680, 2009-2024 Kenworth T800, 2009-2020 Kenworth T370, 2014-2023 Kenworth T880, 2011-2016 Kenworth T470, 2023 Kenworth T480, and 2009-2019 Kenworth W900 vehicles.  The air tanks have an insufficient volume of air for the brake system.  As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."" (accessed 2026-09-11)

_Last verified 2026-09-11. Source: Big Rig Risk — https://bigrigrisk.com/trucks/kenworth-w900/ — every claim checked against a primary source before publication (see /methodology/)._