Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 0 complaints on file for the 1999 Navistar 3800 — too few to judge reliability from owner reports alone — but 6 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.
0
NHTSA complaints
6
Recalls
0
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
6 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.
Defect
VEHICLE DESCRIPTION: SCHOOL BUS. AN AIR BRAKE LINE CONTROLLING THE REAR BRAKES MAY BE TOO CLOSE TO THE EXHAUST PIPE AND COULD RUPTURE AT ANY TIME WITHOUT WARNING.
Consequence
EXHAUST PIPE HEAT CAN MELT OR CAUSE PREMATURE FAILURE OF THIS AIR LINE IF THE AIR LINE IS ROUTED TOO CLOSE TO THE EXHAUST PIPE.
Remedy
DEALERS WILL INSTALL A NEW ELBOW FITTING AND REROUTE THE AIR LINE. THE AIR LINE WILL ALSO BE INSPECTED AND REPLACED IF FOUND TO BE DAMAGED FROM THE EXHAUST PIPE.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS BUILT WITH REAR LEAF SPRING SUSPENSIONS (MODELS 4700 BUILT WITH REAR LEAF SUSPENSIONS AND MANUFACTURED FROM DECEMBER 9, THROUGH DECEMBER 16, 1998; MODELS 3400 AND 3800 BUILT WITH 14SBK REAR LEAF SPRING SUSPENSIONS AND BUILT APRIL 14 THROUGH MAY 10, 1999; AND MODELS 3400 AND 3800 BUILT WITH REAR LEAF SPRING SUSPENSIONS AND MANUFACTURED FROM MAY 10 THROUGH MAY 18, 1999). ON VEHICLES WHERE THE FRAME TO AXLE HOSE LENGTH WAS TOO LONG, A CHAFING CONDITION EXISTS ON SUSPENSION COMPONENTS, WHICH COULD RESULT IN HOSE RUPTURE. ON VEHICLES WHERE THE HOSES ARE TOO SHORT, A HOSE SEPARATION COULD OCCUR WITH SEVERE SUSPENSION ARTICULATION.
Consequence
IF A HOSE RUPTURES, THE REAR BRAKES WILL FAIL INCREASING THE RISK OF A VEHICLE CRASH.
Remedy
SHORT HOSES WILL BE REPLACED AND THE LONG HOSES WILL HAVE A HOSE ROUTING KIT INSTALLED TO PREVENT ANY CHAFING PROBLEMS.
Defect
VEHICLE DESCRIPTION: TRANSIT AND SCHOOL BUSES BUILT WITH ABS AIR BRAKE ECU AND A 100 GALLON FUEL TANK MOUNTED BETWEEN THE RAILS AND BEHIND THE REAR AXLE ON MODELS WITH A 276" WHEEL BASE. THE ABS ECU INTERFERED WITH THE CROSS MEMBER MOUNTED BEHIND THE REAR AXLE AND IN FRONT OF THE BETWEEN THE RAILS FUEL TANK. THIS CREATED A NO-BUILD SITUATION AT THE PLANT - THE PLANT WOULD EITHER ELIMINATE OR RELOCATE THE CROSS MEMBER OR MOVE THE ECU AS NEEDED.
Consequence
IF THE CROSS MEMBER IS EITHER MISSING OR RELOCATED THE VEHICLE MAY NOT HAVE ADEQUATE FUEL TANK PROTECTION. IN THE EVENT OF A CRASH, THE BUS MAY NOT HAVE ADEQUATE FUEL TANK PROTECTION IF THE VEHICLE HAS A MISSING OR IMPROPERLY INSTALLED CROSSMEMBER.
Remedy
DEALERS WILL INSPECT THE VEHICLES TO MAKE SURE ALL CROSS MEMBERS ARE PROPERLY INSTALLED. IF THE CROSS MEMBER IS NOT INSTALLED CORRECTLY OR IS MISSING, THE DEALER WILL REPAIR OR INSTALL THE CROSS MEMBER.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS, TRANSIT AND SCHOOL BUSES, EQUIPPED WITH MERITOR AIR BRAKE AUTOMATIC SLACK ADJUSTERS. SOME OF THE AUTOMATIC SLACK ADJUSTERS HAD INSUFFICIENT TORQUE APPLIED TO THE GUIDE PAWL CAP SCREW.
Consequence
WITHOUT SUFFICIENT TORQUE ON THE GUIDE PAWL CAP SCREW, THE BRAKES COULD GRADUALLY LOSE ADJUSTMENT, INCREASING THE VEHICLE STOPPING DISTANCE.
Remedy
DEALERS WILL CHECK THE TORQUE ON THE AUTOMATIC SLACK ADJUSTER GUIDE PAWL. IF THERE IS NO TORQUE, THE BRAKES WILL BE ADJUSTED AND THE GUIDE PAWL WILL BE TIGHTENED TO 15-20 FT. LBS.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH A T444E DIESEL ENGINE. THE HIGH PRESSURE OILLINE FOR THE FUEL INJECTION SYSTEM THAT GOES FROM THE HIGH PRESSURE OIL PUMP TO THE RIGHT CYLINDER HEAD CAN CHAFE AGAINST THE CHARGE AIR COOLER CROSSOVER PIPE.
Consequence
IF THIS CONDITION OCCURS, THE HOSE WILL FAIL, RESULTING IN A SUDDEN LOSS OF OIL, CAUSING THE ENGINE TO HAVE A SUDDEN LOSS OF POWER.
Remedy
DEALERS WILL INSPECT THE HOSES AND IF THE HOSE IS NOT DAMAGED A CONVOLUTED HOSE WILL BE PLACED OVER THE CURRENT HOSE. IF THE HOSE IS DAMAGED, IT WILL BE REPLACED ALONG WITH THE CONVOLUTED HOSE.
Defect
VEHICLE DESCRIPTION: HEAVY DUTY TRUCKS EQUIPPED WITH A 1710 DRIVE LINE AND A 12 X 4 HYDRAULIC PARKING BRAKE. IF THE BRAKE DRUM OR TRANSMISSION YOKE ARE NOT FULLY SEATED WHEN THE EIGHT BOLTS ARE INSTALLED CONNECTING THE 3-PIECE JOINT, THE BOLTS CAN LOOSEN.
Consequence
BOLTS WILL EVENTUALLY WORK OUT OR SHEAR RESULTING IN DRUM AND DRIVE SHAFT SEPARATION.
Remedy
DEALERS WILL INSPECT THE TORQUE OF THESE BOLTS AND RE-TORQUE TO SPECIFICATION.
The record is thin — 0 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 6 recalls should be verified as completed.
Yes — NHTSA lists 6 recall campaigns affecting the 1999 Navistar 3800. 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.