1999 Jeep Grand Cherokee Power Train:automatic Transmission:park/neutral Start Interlock Switch Problems
NHTSA component category: POWER TRAIN:AUTOMATIC TRANSMISSION:PARK/NEUTRAL START INTERLOCK SWITCH · data through 07/12/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train:automatic transmission:park/neutral start interlock switch ranks on this vehicle
Share of the 1,638 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 Jeep Grand Cherokee overview page.
What owners report
“AUTOMATIC TRANSMISSION MALFUNCTIONED, CAUSING IT TO JUMP OUT OF GEARS AND COULD RESULT IN A CRASH. ALSO VEHICLE WAS ON AND IN "PARK" POSITION AND…”NHTSA complaint 845107 — filed 08/16/1999
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train:automatic Transmission:park/neutral Start Interlock Switch complaints by year filed
Frequently asked questions
Does the 1999 Jeep Grand Cherokee have power train:automatic transmission:park/neutral start interlock switch problems?
Power Train:automatic Transmission:park/neutral Start Interlock Switch is the #2 most-reported problem area on the 1999 Jeep Grand Cherokee: 142 of 1,638 complaints on file (8.7%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 1999 Jeep Grand Cherokee have in total?
1,638 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 124 involved a crash, 15 involved a fire, 64 reported injuries, and 1 reported deaths.
What does NHTSA's power train:automatic transmission:park/neutral start interlock switch category include?
NHTSA assigns each complaint to standard component categories; this page reports the POWER TRAIN:AUTOMATIC TRANSMISSION:PARK/NEUTRAL START INTERLOCK SWITCH category exactly as NHTSA defines and records it.
