NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
50 reportsClear category filter71,005 miles · Feb 22, 2004
Engine And Engine Cooling
I LOVE MY 1999 JEEP WRANGLER AND HAVE BEEN VERY HAPPY TILL NOW. MY HUSBAND AND I HAVE OWNED MANY NEW CARS OVER THE YEARS AND THIS IS THE FIRST TIME EITHER ONE HAVE HEARD OF AN EXHAUST MANIFOLD GOING BAD. WHEN HAVING THE MANIFOLD REPLACED WE WERE TOLD IT HAS BEEN REDESIGNED AND IS DIFFERENT THAN THE ONE REPLACED. IT HAD CRACKED …
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I LOVE MY 1999 JEEP WRANGLER AND HAVE BEEN VERY HAPPY TILL NOW. MY HUSBAND AND I HAVE OWNED MANY NEW CARS OVER THE YEARS AND THIS IS THE FIRST TIME EITHER ONE HAVE HEARD OF AN EXHAUST MANIFOLD GOING BAD. WHEN HAVING THE MANIFOLD REPLACED WE WERE TOLD IT HAS BEEN REDESIGNED AND IS DIFFERENT THAN THE ONE REPLACED. IT HAD CRACKED IN SEVERAL PLACES, MAINLY AT THE WELDS. I FILL SINCE I NEVER TAKE IT OFF ROAD THAT THIS SHOULD NOT OF HAPPEN. NOT TO MENTION IT WAS VERY COSTLY. I FILL SINCE THIS IS A MANUFACTURER PROBLEM I SHOULD BE REVERSED FOR SOMETHING LIKE THIS. *JB
NHTSA ODI #10058710
51,000 miles · Jan 8, 2004
Engine And Engine Cooling
THERE IS A CRACK IN MY EXHAUST MANIFOLD IN MY 1999 JEEP WRANGLER. WHEN I LOOKED INTO THE PROBLEM, I HAVE FOUND MANY PEOPLE WITH THE SAME COMPLAINT. I ALSO LEARNED FROM A DIAMLER-CHRYLSER DEALER THAT THEY REPLACE OVER 250 OF THESE A DAY. AND IN 2000, THEY CHANGED THE PART. THIS MAKES ME THINK THEY REALIZED IT WAS DEFECTIVE AN…
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THERE IS A CRACK IN MY EXHAUST MANIFOLD IN MY 1999 JEEP WRANGLER. WHEN I LOOKED INTO THE PROBLEM, I HAVE FOUND MANY PEOPLE WITH THE SAME COMPLAINT. I ALSO LEARNED FROM A DIAMLER-CHRYLSER DEALER THAT THEY REPLACE OVER 250 OF THESE A DAY. AND IN 2000, THEY CHANGED THE PART. THIS MAKES ME THINK THEY REALIZED IT WAS DEFECTIVE AND DID NOTHING TO THE VICTIMS THAT HAD THE DEFECTIVE PART. *LA
NHTSA ODI #10052664
102,000 miles · Jan 6, 2004
Engine And Engine Cooling
1999 JEEP WRANGLER 6 CYCL. HAS BEEN TO THE DEALERSHIP ON MULTIPLE VISITS. LOSS OF POWER DURING HIGHWAY DRIVING. AFTER REPLACING THE FUEL PUMP, RADIATOR, AND PERFORMING AN ADDITIONAL TUNE-UP BUT PROBLEM IS STILL UNRESOLVED. NOW FIND THAT THERE IS A CRACK IN THE INTAKE MANIFOLD AND THE EXHAUST MANIFOLD HAS COMPLETELY CRACKED. *…
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1999 JEEP WRANGLER 6 CYCL. HAS BEEN TO THE DEALERSHIP ON MULTIPLE VISITS. LOSS OF POWER DURING HIGHWAY DRIVING. AFTER REPLACING THE FUEL PUMP, RADIATOR, AND PERFORMING AN ADDITIONAL TUNE-UP BUT PROBLEM IS STILL UNRESOLVED. NOW FIND THAT THERE IS A CRACK IN THE INTAKE MANIFOLD AND THE EXHAUST MANIFOLD HAS COMPLETELY CRACKED. *AK
NHTSA ODI #10052490
48,488 miles · Dec 10, 2003
Engine And Engine Cooling
FIRST HEARD A PROBLEM WITH THE EXHAUST SYSTEM JUST PRIOR TO THE EASTER HOLIDAY 2002 AND TOOK IT TO THE DEALERSHIP TO BE INVESTIGATED AFTER THE HOLIDAY WEEKEND. I WAS TOLD THE WAS A CRACK IN THE EXHAUST MANIFOLD AND THE VEHICLE WAS ONE DAY OUT OF WARRANTY (DUE TO THE HOLIDAY WEEKEND). AFTER CONSIDERABLE DEBATE, THE DEALERSHIP A…
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FIRST HEARD A PROBLEM WITH THE EXHAUST SYSTEM JUST PRIOR TO THE EASTER HOLIDAY 2002 AND TOOK IT TO THE DEALERSHIP TO BE INVESTIGATED AFTER THE HOLIDAY WEEKEND. I WAS TOLD THE WAS A CRACK IN THE EXHAUST MANIFOLD AND THE VEHICLE WAS ONE DAY OUT OF WARRANTY (DUE TO THE HOLIDAY WEEKEND). AFTER CONSIDERABLE DEBATE, THE DEALERSHIP AGREED TO REPAIR THE VEHICLE FOR A $150.00 DEDUCTIBLE. NOW A YEAR AND A HALF LATER THE EXACT SAME ISSUE HAS ARISEN AND THE FACTORY REPAIR IS ONLY WARRANTED FOR 12 MONTHS/12,000 MILES. AFTER AN EXCHANGE OF 4 EMAILS WITH DAIMLER/CHRYSLER THEY CONTINUE TO TELL ME THERE IS NOTHING THEY CAN DO AND I AM LIABLE FOR THE FULL REPAIR COST. *LA
NHTSA ODI #10049541
37,000 miles · Dec 3, 2003
Engine And Engine Cooling
MANY JEEP WRANGLERS BUILT BEFORE 2001 HAVE A DEFECTIVE MANIFOLD THAT CRACKS, CAUSING EXHAUST PROBLEMS. THIS IS THE REASON JEEP COMPLETELY REDESIGNED THE MANIFOLD IN THE NEWER MODELS. THEY HAVE YET TO SEND OUT A RECALL TO FIX THIS PROBLEM. WHEN I FIRST NOTICED THE LOUD NOISE RESULTING FROM THE CRACKED MANIFOLD, MY CAR HAD APPR…
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MANY JEEP WRANGLERS BUILT BEFORE 2001 HAVE A DEFECTIVE MANIFOLD THAT CRACKS, CAUSING EXHAUST PROBLEMS. THIS IS THE REASON JEEP COMPLETELY REDESIGNED THE MANIFOLD IN THE NEWER MODELS. THEY HAVE YET TO SEND OUT A RECALL TO FIX THIS PROBLEM. WHEN I FIRST NOTICED THE LOUD NOISE RESULTING FROM THE CRACKED MANIFOLD, MY CAR HAD APPROXIMATELY 37,000 MILES ON IT. NOT HIGH MILEAGE BY ANY MEANS. THE MAIN CONCERN I HAVE WITH THIS PROBLEM IS THE HEALTH HAZARD IT POSES TO THE DRIVER. THE SECTION OF THE WRANGLER WHERE THE CRACKED MANIFOLD IS LOCATED IS UNDERNEATH THE FRONT OF THE CAR, WHERE EXHAUST FUMES LEAKING FROM IT SEEP UP INTO THE CABIN VERY EASILY, ESPECIALLY WHEN STOPPED AT LIGHTS OR IN HEAVY TRAFFIC. I BELIEVE THE MANUFACTURERS OF JEEP ARE VERY AWARE OF THIS PROBLEM BUT DON'T CARE TO DO ANYTHING ABOUT IT. *NLM
NHTSA ODI #10049149
55,000 miles · Nov 30, 2003
Engine And Engine Cooling
SMALL CRACK DEVELOPED IN EXHUST MANIFOLD, CAUSING TICKING NOISE AND LOWERED FUEL ECONOMY.*AK
NHTSA ODI #10048896
20,000 miles · Nov 5, 2003
Engine And Engine Cooling
THE EXHAUST MANIFOLD CRACKED IN THREE DIFFERENT PLACES AND CAUSED THE VEHICLE TO MISFIRE AND STALL. AN INDEPENDENT SHOP STATED THAT THE MANIFOLD CRACKED BECAUSE IT WAS NOT PROPERLY SUPPORTED. THE DEALER WAS NOTIFIED BUT STATED THERE WAS NOTHING THEY COULD DO. *NLM *JB *NLM
NHTSA ODI #10042271
64,850 miles · Sep 18, 2003
Engine And Engine Cooling
EXHAUST MANIFOLD CRACKED IN TWO PLACES. POOR DESIGN DUE TO THE INABILITY TO EXPAND AND CONTRACT DUE TO THERMAL EXPANSION (IN AN EXHAUST MANIFOLD!!!). EXHAUST FUMES ENTERING CABIN WHILE DRIVING.*JB
NHTSA ODI #10039128
15,000 miles · Sep 15, 2003
Engine And Engine Cooling
I HAVE A 1999 JEEP WRANGLER. THE EXHAUST MANIFOLD CRACKED. AT FIRST I THOUGHT IT WAS JUST MINE BUT AFTER SOME DISCUSSION WITH OTHERS I FOUND THIS IS COMMON. DID NOT HAVE IT FIXED IMMEDIATELY BECAUSE AT FIRST IT WAS NOT BAD. I ONLY DISCOVERED IT AFTER IT BECAME VERY LOUD. HOT EXHAUST BLOWS ON OTHER ENGINE COMPONENTS
NHTSA ODI #10038944
Mileage unknown · Aug 7, 2003
Engine And Engine Cooling
CONSUMER STATES THAT THE VEHICLE CHECK ENGINE LIGHT COAES ON AND STAYS ON. DEALER NOTIFIED. *PH
NHTSA ODI #10032359
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