There are 8 stored owner reports matching the engine leading-label group for the 1993 Geo Prizm in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 8 of 8 matching reports.
Open the full vehicle complaint log (all categories)DANGEROUS LEVELS OF CARBON MONOXIDE LEAKING INTO PASSENGER COMPARTMENT DUE TO CRACKED EXHAUST MANIFOLD. REPLACED CRACKED MANIFOLD TWO TIMES, THE SECOND ONE LASTED 16 MONTHS. THIS IS A SAFETY ISSUE DUE TO THE CARBON MONOXIDE!! EXHAUST REPAIR SHOPS TOLD ME THAT THIS IS A VERY COMMON PROBLEM WITH GEO PRIZM AND TOYOTA COROLLA MODELS. AT OVER $300 TO REPLACE EACH TIME, I CAN NOT AFFORD TO KEEP REPLACING. THE MAIN CONCERN I HAVE THOUGH IS WITH THE CARBON MONOXIDE ISSUE. IS THIS BEING INVESTIGATED? *LA
WHILE DRIVING CAR HOME FROM WORK I NOTICED ENGINE NOISE GETTING LOUDER. UPON CLOSER INSPECTION THE FOLLOWING MORNING I FOUND THAT THE EXHAUST MANIFOLD WAS CRACKED COMPLETELY INTO TWO SEPERATE PIECES.ALSO NOTICED ODOR FROM EXHAUST LEAKING INTO PASENGER COMPARTMENT.APARENTLY I AM NOT THE ONLY ONE WITH THIS PROBLEM AND WOULD THINK THAT EXHAUST FUMES ARE A LARGE PROBLEM FOR MY EIGHTEEN MONTH OLD SON.I WANT TO KNOW IF ANYONE HAS OR IS INVESTIGATING THIS AND WHAT IF ANYTHING WAS OR WILL BE DONE ABOUT IT. *LA
THE ENGINE EXHAUST MANIFOLD CRACKED DUE TO A MANUFACTURER DESIGN DEFECT FOR THE SECOND TIME AT THE SAME PLACE. I HAVE OWNED SEVEREAL VEHICLES DURING MY LIFE AND THIS IS THE ONLY ONE THAT HAS HAD A CRACKED MANIFOLD. THE FIRST TIME IT BROKE IT WAS REPLACED BY THE DEALER. THE SECOND TIME THEY REFUSED TO REPLACE IT BECAUSE OUT OF WARRANTY. ESITMATED COST TO REPAIR THE DEFECTIVE PART OVER $300.00. *AK
WEATHER HAD BEEN COLD; VEHICLE WAS RUNNING; HAD NOTICED VEHICLE WAS LEAKING EXHAUST. CHECKED UNDER THE HOOD & NOTICED THAT EXHAUST MANIFOLD WAS CRACKED. *AK
MASS AIR FLOW CONTROL FAILURE CAUSES VEHICLE TO STALL OUT OR JERK. VEHICLE HAS TO BE SHIFTED TO PARK IN ORDER TO RESTART.
WHILE DRIVING THE OIL CAP EXPLODED AND THE ENGINE STARTED SMOKING; ON 2 SEPARATE OCCASIONS TH WINDOW REGULATORS FAILED, SENDING THE WINDOWS INTO THE DOORS AND ENGINE WOULD SEIZE INTERMITTENTLY. *AK
DEAR SIR OR MADAM: I OWN A 1993 GEO PRIZM. TWICE, I HAVE HAD THE EXHAUST MANIFOLD REPAIRED BY A WELDER BECAUSE IT WAS CRACKED AND LEAKING EXHAUST FUMES INTO THE VEHICLE. DESPITE THE WELDER'S BEST EFFORTS, THE MANIFOLD KEEPS DEVELOPING MORE CRACKS. I WANTED TO REPLACE IT WITH A USED MANIFOLD. HOWEVER, A CALL TO SEVERAL SALVAGE YARDS REVEALED THAT IT'S VERY HARD TO OBTAIN A GOOD, USED MANIFOLD FOR THAT VEHICLE. THE REASON IS THAT SO MANY OF THE 1993 PRIZMS THAT ARE IN SALVAGE YARDS ALREADY HAVE CRACKED MANIFOLDS. IT SEEMS TO BE COMMON AMONG THAT MAKE AND MODEL. SHOULDN'T YOUR ORGANIZATION BE CONCERNED WITH WHAT MAY BE A SERIOUS SAFETY ISSUE IN THESE VEHICLES? I THOUGHT SO, AND THAT'S WHY I'M WRITING, TODAY.*AK
A CRACK DEVELOPED WITHIN EXHAUST MANIFOLD AT 90,000 MILES. *AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Sep 11, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.