# Kenworth T800 Used Price & Common Problems | Big Rig Risk

> Kenworth T800: used $23,500 to $144,950. Documented problems: fuel injectors (CAT C15/C13) and engine overheating. What to inspect before you buy.

**Verdict:** insufficient-data

Documented failure points and real market prices for the Kenworth T800.

**Observed used price:** $23,500–$144,950

**Documented failure risks:**
- turbocharger bearings (CAT C15/C13): T800s of the CAT C15/C13 era ran a twin-turbo setup that is sensitive to oil viscosity; wrong oil accelerates turbo bearing failure.
- fuel injectors (CAT C15/C13): Contaminated fuel destroys the injector set; a full 8-injector replacement is a major repair bill.
- Engine overheating: Overheating on the CAT C15/C13 commonly used in T800s can crack heads or warp the block.
- EGR valve clogging (CAT C15/C13): The EGR valve on these engines gets clogged with soot over time, restricting exhaust recirculation.

## Sources
- [skylinerrepaircenter.com (failure evidence)](https://skylinerrepaircenter.com/blog/caterpillar-truck-engines-legacy-maintenance-guide) (accessed 2026-09-06)
- [soarr.com dealer inventory (10 real listings, Claude-refetched)](https://www.soarr.com/for-sale/trucks/0/Kenworth/T800/all-for-sale) (accessed 2026-09-06)
- [NHTSA recall 19V911000 (POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=19V911000) — "PACCAR Incorporated  (PACCAR) is recalling certain 2020 Kenworth T800, T880 and W990 and Peterbilt 348, 367, 389, 520, and 567 vehicles.  The forward rear axle output shafts may have been improperly heat treated during manufacturing, possibly resulting in the shafts fracturing." (accessed 2026-09-11)
- [NHTSA recall 20V506000 (POWER TRAIN:AXLE ASSEMBLY)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=20V506000) — "PACCAR Incorporated (PACCAR) is recalling certain 2020-2021 Peterbilt 348, 365, 367, 389, 520, 567 and Kenworth T800, T880, W900, W990 vehicles equipped with Watson and Chalin steerable lift axle suspension systems (model SL2065).  The axles may have lower rear pivot bolts that are not long enough to sufficiently engage the locking feature of the corresponding nuts." (accessed 2026-09-11)

_Last verified 2026-09-11. Source: Big Rig Risk — https://bigrigrisk.com/trucks/kenworth-t800/ — every claim checked against a primary source before publication (see /methodology/)._