1999 Jeep Wrangler Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe Problems

NHTSA component category: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE · data through 07/12/2026

34Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe complaints

16%Of all 213 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe ranks on this vehicle

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE34 · 16%

ELECTRICAL SYSTEM27 · 12.7%

AIR BAGS16 · 7.5%

ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH13 · 6.1%

STRUCTURE:BODY9 · 4.2%

Share of the 213 complaints citing each category; one complaint can cite several. Full breakdown on the 1999 Jeep Wrangler overview page.

What owners report

“A POPPING NOISE FROM THE EXHAUST MANIFOLD WAS HEARD WHEN CONSUMER REMOVED FOOT FROM GAS PEDAL. DURING A STATE INSPECTION THE STATE INSPECTOR NOTICED A…”NHTSA complaint 10067205 — filed 04/15/2004

“CONSUMER EXPERIENCED HEADACHES AND DIZZINESS FOR MONTHS DUE TO AN EXHAUST LEAK. THE PROBLEM WAS DISCOVERED TO BE A CRACKED MANIFOLD. THE CONSUMER REQUESTED ASSISTANCE…”NHTSA complaint 10066817 — filed 04/01/2004

“EVERY MANIFOLD IN JEEP WRANGLERS ARE FAULTY AND CRACK LEAVING THE CABINS OF WRANGLERS FILLING WITH CARBON MONOXIDE. THIS IS A WELL KNOWN ISSUES WITH…”NHTSA complaint 10064322 — filed 04/01/2004

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe complaints by year filed

Frequently asked questions

Does the 1999 Jeep Wrangler have engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe problems?

Engine And Engine Cooling:exhaust System:manifold/header/muffler/tail Pipe is the most-reported problem area on the 1999 Jeep Wrangler: 34 of 213 complaints on file (16%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 1999 Jeep Wrangler have in total?

213 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 15 involved a crash, 6 involved a fire, 10 reported injuries, and none reported deaths.

What does NHTSA's engine and engine cooling:exhaust system:manifold/header/muffler/tail pipe category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.