Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 0 complaints on file for the 1999 Navistar 9100i — too few to judge reliability from owner reports alone — but 3 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.
0
NHTSA complaints
3
Recalls
0
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
3 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. THE ANTILOCK TRACTION RELAY VALVES WERE INCORRECTLY ASSEMBLED BY THE SUPPLIER. AN EXTRA CHECK VALVE WAS INSTALLED WHICH WILL NOT ALLOW THE TRACTION CONTROL SYSTEM TO FUNCTION PROPERLY.
Consequence
THE REAR BRAKES CAN BE APPLIED AUTOMATICALLY DURING A TRACTION EVENT AND NOT RELEASE UNTIL THE AIR SYSTEM PRESSURE IS DEPLETED.
Remedy
DEALERS WILL INSPECT THESE VEHICLES AND ALL ANTILOCK TRACTION RELAY VALVES FOUND DEFECTIVE WILL BE REPLACED.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS. THE CHECK VALVES IN THE AIR BRAKE SYSTEM ON THESE VEHICLES DO NOT MEET THE REQUIREMENTS OF FMVSS NO. 121, "AIR BRAKE SYSTEMS."
Consequence
INCREASED BRAKING EFFORT MAY BE REQUIRED.
Remedy
DEALERS WILL INSTALL NEW CHECK VALVES ON THE VEHICLES INVOLVED.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH STEERING COLUMNS SUPPLIED BY DOUGLAS AUTOTEC. THE STEERING COLUMNS ON THESE VEHICLES MAY HAVE A DEFECTIVE OR DISLOCATED WELD.
Consequence
IF THE STEERING COLUMN BROKE, A COMPLETE LOSS OF STEERING CONTROL COULD OCCUR, INCREASING THE RISK OF A CRASH.
Remedy
DEALERS WILL REPLACE THE LOWER STEERING SHAFT ASSEMBLY.
The record is thin — 0 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 3 recalls should be verified as completed.
Yes — NHTSA lists 3 recall campaigns affecting the 1999 Navistar 9100i. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.