# International LT Used Price & Common Problems | Big Rig Risk

> International LT: used $39,950 to $101,500. Documented problems: fuel pump and coolant level sensor. What to inspect before you buy.

**Verdict:** inspect

Used International LT: $39,950–$101,500 observed used across 3 listings. The documented cost risk to price in: the fuel pump, the most common X15 complaint. Buy only after inspection.

**Observed used price:** $39,950–$101,500

**Documented failure risks:**
- Fuel pump: Fuel pump is the headline X15 platform complaint: "the most common problem is the fuel
- Coolant level sensor: LT-specific diagnostic case (2023 model year): a dual-sensor fault -- a failed coolant level

## Sources
- [youtube.com](https://www.youtube.com/watch?v=ddvI0EP_ANg) (accessed 2026-08-19)
- [youtube.com](https://www.youtube.com/watch?v=oh6-x3lp-iM) (accessed 2026-08-19)
- [youtube.com](https://www.youtube.com/watch?v=XHzxB5P09Pg) (accessed 2026-08-19)
- [youtube.com](https://www.youtube.com/watch?v=HTnUz-aWQOI) (accessed 2026-08-19)
- [youtube.com](https://www.youtube.com/watch?v=CrDuDh0DsbM) (accessed 2026-08-19)
- [cylinder-heads.com](https://www.cylinder-heads.com/cummins-isx/) (accessed 2026-08-19)
- [dieselrebuildkits.com](https://dieselrebuildkits.com/) (accessed 2026-08-19)
- [soarr.com dealer inventory listings (3 real listings observed 2026-09-05)](https://www.soarr.com/for-sale/trucks/0/International/LT/all-for-sale) (accessed 2026-09-05)
- [NHTSA recall 18V588000 (ENGINE AND ENGINE COOLING:ENGINE:DIESEL)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=18V588000) — "Navistar, Inc. (Navistar) is recalling certain 2017-2018 International ProStar and 9900i trucks, 2018-2019 International LT trucks, 2017-2019 International LoneStar and HX trucks and 2017 International PayStar trucks, equipped with Cummins ISX15 or X15 diesel engines.  In certain driving conditions, such as on a long down-hill grade, the fuel line may burst if the fuel pump cooling circuit screen becomes restricted." (accessed 2026-09-11)
- [NHTSA recall 22V428000 (STEERING)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=22V428000) — "Navistar, Inc. (Navistar) is recalling certain 2022-2023 International HX, HV, LoneStar, LT, MV, RH, IC TC Commercial Bus, and  2022 International WorkStar vehicles.  The steering gears may have been assembled incorrectly, which can cause the gear to fracture." (accessed 2026-09-11)
- [NHTSA recall 22V164000 (ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES)](https://www.nhtsa.gov/recalls?nhtsacampaignnumber=22V164000) — "Navistar, Inc. (Navistar) is recalling certain 2018-2023 International LT vehicles equipped with a 1500W Purkeys inverter system.  The positive battery cable may be incorrectly routed, causing it to chafe on the side skirt frame and become damaged." (accessed 2026-09-11)

_Last verified 2026-09-11. Source: Big Rig Risk — https://bigrigrisk.com/trucks/international-lt-cummins-x15/ — every claim checked against a primary source before publication (see /methodology/)._