Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
200–25K
6725–50K
2750–75K
2375–100K
12100–150K
4150K+
153 reports with mileage · 246 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Steering. Review the 215 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Electrical System. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Seats. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
12 crash reports1 fire reports3 injury reports
What owners actually said
399 reports
Mileage unknown · Aug 8, 2002
Steering
ON 08/02/02 I WAS BACKING MY VEHICLE OUT OF A PARKING SPACE WHEN THE STEERING WHEEL LOCKED UP AND WOULD NOT UNLOCK. THE VEHICLE HAD TO BE TOWED TO A DEALERSHIP TO BE REPAIRED. THE DEALERSHIP, TERRY CULLEN CHEVROLET IN MORROW GA, STATED THAT THIS A COMMON PROBLEM WITH THE CORVETTE. I CONTACTED CHEVROLET AND THEY REFUSED TO ADMIT …
Read full complaint
ON 08/02/02 I WAS BACKING MY VEHICLE OUT OF A PARKING SPACE WHEN THE STEERING WHEEL LOCKED UP AND WOULD NOT UNLOCK. THE VEHICLE HAD TO BE TOWED TO A DEALERSHIP TO BE REPAIRED. THE DEALERSHIP, TERRY CULLEN CHEVROLET IN MORROW GA, STATED THAT THIS A COMMON PROBLEM WITH THE CORVETTE. I CONTACTED CHEVROLET AND THEY REFUSED TO ADMIT THAT THERE IS A PROBELM WITH THIS PART EVEN THOUGH THERE WAS A RECALL FOR THIS PROBLEM IN 1997 AND APPARENTLY ON SOME 98 MODELS.*AK REF. IN EA02-031 *CJS
NHTSA ODI #765393
Mileage unknown · Aug 4, 2002
Visibility
SPRING LOADED OUTSIDE REAR VIEW MIRROR MOUNTS HAVE FAILED ON BOTH SIDES OF THE VEHICLE (ONE YEAR APPART). THEY SAG DOWN AND ARE IMPOSSIBLE TO USE LEADING TO A VISION HAZARD.*AK
NHTSA ODI #765166
Mileage unknown · Jul 29, 2002
Steering
WHILE DRIVING AT 5 MPH IN REVERSE STEERING WHEEL LOCKED UP, AND CONSUMER COULD NOT CONTROL VEHICLE. CONTACTED DEALER. *AK REF. IN EA02-031 *CJS
NHTSA ODI #8014969
Mileage unknown · Jul 24, 2002
Steering
WHILE DRIVING STEERING WHEEL LOCKED UP. CONTACTED DEALER. AS A RESULT OF STEERING LOCKING UP MOTOR WAS DEFECTIVE.*AKCONSUMER STATES THERE IS A RECALL REGARDING THIS DEFECT, BUT THIS VEHICLE DOES NOT FALL UNDER THE PARAMETERS OF THE RECALL. *JG REF. IN EA02-031 *CJS
NHTSA ODI #8014673
Mileage unknown · Jul 22, 2002
EquipmentSteering
VEHICLE WAS PARKED. AFTER STARTING THE STEERING WHEEL WOULD NOT TURN. DASHBORD MESSAGE STATED "REMOVE KEY WAIT TEN SECONDS." I DID AND RESTARTED THE VEHICLE BUT THE STEERING WHEEL WOULD NOT TURN. DASHBOARD MESSAGE STATED "SERVICE STEERING COLUMN." AFTER REPEATED ATTEMPTS OF STOPPING, STARTING VEHICLE AND TRYING TO TURN THE…
Read full complaint
VEHICLE WAS PARKED. AFTER STARTING THE STEERING WHEEL WOULD NOT TURN. DASHBORD MESSAGE STATED "REMOVE KEY WAIT TEN SECONDS." I DID AND RESTARTED THE VEHICLE BUT THE STEERING WHEEL WOULD NOT TURN. DASHBOARD MESSAGE STATED "SERVICE STEERING COLUMN." AFTER REPEATED ATTEMPTS OF STOPPING, STARTING VEHICLE AND TRYING TO TURN THE WHEEL IT REMAINED LOCKED. I CALLED AAA FOR A TOW TRUCK - WHILE WAITING FOR IT TO ARRIVE I CONTINUED TO TRY TO UNLOCK THE WHEEL. AFTER AROUND TWENTY MINUTES OF TRYING IT FINALLY UNLOCKED. I CANCELLED THE TOW TRUCK AND DROVE TO THE DEALER. IF I HAD KNOWN THE STEERING WHEEL COULD LOCK AGAIN WHILE I WAS DRIVING, AS I DETERMINED BY SUBSEQUENT INTERNET RESEARCH, I WOULD NOT HAVE DRIVEN TO THE DEALER. MY OUT OF POCKET COST FOR THE DEALER'S REPLACEMENT OF THE STEERING COLUMN LOCK WAS $100 BECAUSE I HAVE AN EXTENDED WARRANTY. THIS IS A SERIOUS SAFETY CONCERN AND SHOULD BE THE SUBJECT OF A RECALL.*AK REF. IN EA02-031 *CJS
NHTSA ODI #764556
Mileage unknown · Jul 11, 2002
Fuel System, Gasoline
THE FUEL GAUGE FLUCTUATES BETWEEN FULL AND EMPTY WHIL DRIVING, THE DEALER HAS REPLACED UNKNOWN COMPONENTS YET THE PROBLEM HAS REOCCURED. NLM
NHTSA ODI #786040
Mileage unknown · Jul 2, 2002
Steering
STEERING COLUMN REMAINS LOCKED AFTER CAR IS STARTED. THE FOLLOWING MESSAGE APPEARS: "SERVICE COLUMN LOCK". THE COLUMN LOCK DOES NOT DISENGAGE. THE CAR IS BEING TOWED TO THE DEALERSHIP. REF. IN EA02-031 *CJS
NHTSA ODI #763749
Mileage unknown · Jun 14, 2002
Steering
MY STEERING COLUMN LOCKED UP WHILE THE VEHICLE WAS MOVING CAUSING A TOTAL LOSS OF STEERING. THE FRONT OF THE CAR WAS SLIGHTLY DAMAGED BECAUSE OF THIS. IT IS A KNOWN PROBLEM BY GM AFFECTING MANY VEHICLES OUTSIDE OF THEIR SO CALLED POOL OF VIN. #'S. IT IS A MATTER OF TIME BEFORE INNOCENT PEOPLE ARE HARMED BY THIS IF IT HAS NOT H…
Read full complaint
MY STEERING COLUMN LOCKED UP WHILE THE VEHICLE WAS MOVING CAUSING A TOTAL LOSS OF STEERING. THE FRONT OF THE CAR WAS SLIGHTLY DAMAGED BECAUSE OF THIS. IT IS A KNOWN PROBLEM BY GM AFFECTING MANY VEHICLES OUTSIDE OF THEIR SO CALLED POOL OF VIN. #'S. IT IS A MATTER OF TIME BEFORE INNOCENT PEOPLE ARE HARMED BY THIS IF IT HAS NOT HAPPENED ALREADY.*AK REF. IN EA02-031 *CJS
NHTSA ODI #763098
Mileage unknown · Jun 12, 2002
Seat Belts
THE CONSUMER HAS REPEATEDLY RECIEVED BAD SERVICES FROM HIS LOCAL CHEVROLET DEALERS AND IS REQUESTING THE PARTS AND INSTRUCTIONS TO PERFORM HIS OWN RECALL REPAIR (00V-111) FOR THE SEAT BELT. NLM
NHTSA ODI #564258
Mileage unknown · May 17, 2002
Parking BrakeCrashInjury
PARKING BRAKE WAS FULLY ENGAGED, GOT OUT OF CAR, BRAKE LET GO, CAR ROLLED BACKWARDS INTO NEIGHBORS CHAIN LINK FENCE. I WAS INJURED AS THE CAR HIT ME, ALMOST RUNNING OVER ME.*AK
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH ELECTRONIC COLUMN LOCK SYSTEMS (ECL), WHEN THE IGNITION SWITCH IS TURNED TO "LOCK," THE ECL SYSTEM PREVENTS TURNING OF THE STEERING SYSTEM. WHEN THE VEHICLE IS STARTED, THE ECL UNLOCKS THE STEERING SYSTEM. THE VEHICLE IS DESIGNED SO THAT IF THE COLUMN FAILS TO UNLOCK WHEN THE VEHICLE IS STARTED AND THE CUSTOMER TRIES TO DRIVE, THE FUEL SUPPLY WILL BE SHUT OFF SO THAT THE VEHICLE CANNOT MOVE WHEN THE VEHICLE CANNOT BE STEERED. IF VOLTAGE AT THE POWERTRAIN CONTROL MODULE IS LOW OR INTERRUPTED, HOWEVER, THE FUEL SHUT OFF MAY NOT OCCUR AND THE VEHICLE CAN BE ACCELERATED WHILE THE STEERING SYSTEM IS LOCKED. ALSO WHEN THE CONTROL SYSTEM SHOWS THAT THE ECL IS UNLOCKED AND THE VEHICLE IS BEING DRIVEN, THE LOCK PIN LOCATION CAN VARY. DEPENDING ON THE LOCATION OF THE LOCK PLATE RELATIVE TO THE SWITCH TRANSITION POINT, THERE COULD THEN BE CONTACT BETWEEN THE LOCK PLATE AND PIN CAUSING THE STEERING TO LOCK WHILE DRIVING .
Consequence & remedy
Consequence: IF THIS OCCURS, A CRASH COULD OCCUR WITHOUT WARNING.
Remedy: ON VEHICLES EQUIPPED WITH AN AUTOMATIC TRANSMISSION, THE DEALER WILL DISABLE THE STEERING COLUMN LOCK BY REMOVING THE COLUMN LOCK PLATE. WHEN THE IGNITION KEY IS REMOVED, THE TRANSMISSION SHIFTER WILL LOCK BUT THE STEERING COLUMN WILL NOT LOCK. ON VEHICLES EQUIPPED WITH A MANUAL TRANSMISSION, THE DEALER WILL REPROGRAM THE POWERTRAIN CONTROL MODULE, PERFORM A DIMENSIONAL CHECK OF THE COLUMN LOCK AND, IF NECESSARY, REPLACE THE LOCK PLATE. THE STEERING COLUMN ON THESE VEHICLES WILL CONTINUE TO LOCK WHEN THE KEY IS REMOVED. OWNER NOTIFICATION TO OWNERS OF 1997 VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS BEGAN ON APRIL 26, 2004. OWNERS OF 1998 THROUGH 2004 VEHICLES (EXCEPT 1997-1998 MANUAL TRANSMISSION VEHICLES) WILL BE NOTIFIED BEGINNING ON AUGUST 2, 2004. THE REMAINING OWNERS (1997-1998 MANUAL TRANSMISSION VEHICLES) WILL BE NOTIFIED LATER IN 2004, WHEN PARTS ARE AVAILABLE. OWNERS SHOULD CONTACT CHEVROLET AT 1-800-630-2438.
IN 2001, GENERAL MOTORS (GM) ISSUED CUSTOMER SERVICE CAMPAIGNS 1044 AND 1044A TO ADDRESS A CONDITION WHERE THE STEERING COLUMN WOULD FAIL TO UNLOCK DURING THE INITIAL KEY-IN AND START-UP IN CERTAIN MY 1998-2000 CORVETTE VEHICLES.HOWEVER, ODI CONTINUED TO RECEIVE COMPLAINTS CONCERNING STEERING COLUMN LOCKUP ON CORVETTE VEHICLES.AS A RESULT, PE02-054 WAS OPENED AND LATER UPGRADED TO EA02-031 FOR MY 1997-2001 SUBJECT VEHICLES.ODI'S ANALYSIS IDENTIFIED CONCERNS WITH POST-REPAIR FAILURES IN VEHICLES SERVICED THROUGH THE CAMPAIGNS, AS WELL AS, FAILURES IN MY 1997-2003 SUBJECT VEHICLES NOT INCLUDED IN THE CAMPAIGNS.(NOTE: THE MANUFACTURER FAILURE DATA ABOVE IS LIMITED TO MY 1997-2003 VEHICLES THROUGH 10/17/2003.)ON FEBRUARY 6, 2004, GM NOTIFIED NHTSA OF A SAFETY DEFECT IN MY 1997-2004 CORVETTE VEHCLES EQUIPPED WITH MANUAL TRANSMISSIONS AND MY 1997-2000 CORVETTE VEHICLES WITH AUTOMATIC TRANSMISSIONS.THE NOTIFICATION STATED THAT IF THE VOLTAGE AT THE POWERTRAIN CONTROL MODULE (PCM), WHICH WAS DESIGNED TO SHUT DOWN THE FUEL SUPPLY WHEN THE STEERING COLUMN FAILED TO UNLOCK AND THE CUSTOMER TRIED TO DRIVE THE VEHICLE, IS LOW OR INTERRUPTED, THE FUEL SHUT OFF MAY NOT OCCUR.AS A RESULT, THE CUSTOMER COULD DRIVE THE VEHICLE WHILE THE STEERING COLUMN WAS LOCKED CAUSING THE DRIVER TO LOSE STEERING CONTROL AND POSSIBLY CRASH WITHOUT WARNING.GM WILL INSTRUCT OWNERS TO BRING THEIR VEHICLES TO A DEALER TO HAVE THE PCM REPROGRAMMED FOR MANUAL TRANSMISSION VEHICLES AND THE ELECTRIC COLUMN LOCK DISABLED FOR AUTOMATIC TRANSMISSION VEHICLES.ODI WILL MONITOR THE EFFECTIVENESS OF THE REMEDY IN THE MANUAL TRANSMISSION VEHICLES AND TAKE FURTHER ACTION IF WARRANTED.
Additional source detail variants (3)
Steering:column
IN 2001, GENERAL MOTORS (GM) ISSUED CUSTOMER SERVICE CAMPAIGNS 1044 AND 1044A TO ADDRESS A CONDITION WHERE THE STEERING COLUMN WOULD FAIL TO UNLOCK DURING THE INITIAL KEY-IN AND START-UP IN CERTAIN MY 1998-2000 CORVETTE VEHICLES.HOWEVER, ODI CONTINUED TO RECEIVE COMPLAINTS CONCERNING STEERING COLUMN LOCKUP ON CORVETTE VEHICLES.AS A RESULT, PE02-054 WAS OPENED AND LATER UPGRADED TO EA02-031 FOR MY 1997-2001 SUBJECT VEHICLES.ODI'S ANALYSIS IDENTIFIED CONCERNS WITH POST-REPAIR FAILURES IN VEHICLES SERVICED THROUGH THE CAMPAIGNS, AS WELL AS, FAILURES IN MY 1997-2003 SUBJECT VEHICLES NOT INCLUDED IN THE CAMPAIGNS.(NOTE: THE MANUFACTURER FAILURE DATA ABOVE IS LIMITED TO MY 1997-2003 VEHICLES THROUGH 10/17/2003.)ON FEBRUARY 6, 2004, GM NOTIFIED NHTSA OF A SAFETY DEFECT IN MY 1997-2004 CORVETTE VEHCLES EQUIPPED WITH MANUAL TRANSMISSIONS AND MY 1997-2000 CORVETTE VEHICLES WITH AUTOMATIC TRANSMISSIONS.THE NOTIFICATION STATED THAT IF THE VOLTAGE AT THE POWERTRAIN CONTROL MODULE (PCM), WHICH WAS DESIGNED TO SHUT DOWN THE FUEL SUPPLY WHEN THE STEERING COLUMN FAILED TO UNLOCK AND THE CUSTOMER TRIED TO DRIVE THE VEHICLE, IS LOW OR INTERRUPTED, THE FUEL SHUT OFF MAY NOT OCCUR.AS A RESULT, THE CUSTOMER COULD DRIVE THE VEHICLE WHILE THE STEERING COLUMN WAS LOCKED CAUSING THE DRIVER TO LOSE STEERING CONTROL AND POSSIBLY CRASH WITHOUT WARNING.GM WILL INSTRUCT OWNERS TO BRING THEIR VEHICLES TO A DEALER TO HAVE THE PCM REPROGRAMMED FOR MANUAL TRANSMISSION VEHICLES AND THE ELECTRIC COLUMN LOCK DISABLED FOR AUTOMATIC TRANSMISSION VEHICLES.ODI WILL MONITOR THE EFFECTIVENESS OF THE REMEDY IN THE MANUAL TRANSMISSION VEHICLES AND TAKE FURTHER ACTION IF WARRANTED.
Steering:column LOCKING:ANTI-THEFT Device
IN 2001, GENERAL MOTORS (GM) ISSUED CUSTOMER SERVICE CAMPAIGNS 1044 AND 1044A TO ADDRESS A CONDITION WHERE THE STEERING COLUMN WOULD FAIL TO UNLOCK DURING THE INITIAL KEY-IN AND START-UP IN CERTAIN MY 1998-2000 CORVETTE VEHICLES.HOWEVER, ODI CONTINUED TO RECEIVE COMPLAINTS CONCERNING STEERING COLUMN LOCKUP ON CORVETTE VEHICLES.AS A RESULT, PE02-054 WAS OPENED AND LATER UPGRADED TO EA02-031 FOR MY 1997-2001 SUBJECT VEHICLES.ODI'S ANALYSIS IDENTIFIED CONCERNS WITH POST-REPAIR FAILURES IN VEHICLES SERVICED THROUGH THE CAMPAIGNS, AS WELL AS, FAILURES IN MY 1997-2003 SUBJECT VEHICLES NOT INCLUDED IN THE CAMPAIGNS.(NOTE: THE MANUFACTURER FAILURE DATA ABOVE IS LIMITED TO MY 1997-2003 VEHICLES THROUGH 10/17/2003.)ON FEBRUARY 6, 2004, GM NOTIFIED NHTSA OF A SAFETY DEFECT IN MY 1997-2004 CORVETTE VEHCLES EQUIPPED WITH MANUAL TRANSMISSIONS AND MY 1997-2000 CORVETTE VEHICLES WITH AUTOMATIC TRANSMISSIONS.THE NOTIFICATION STATED THAT IF THE VOLTAGE AT THE POWERTRAIN CONTROL MODULE (PCM), WHICH WAS DESIGNED TO SHUT DOWN THE FUEL SUPPLY WHEN THE STEERING COLUMN FAILED TO UNLOCK AND THE CUSTOMER TRIED TO DRIVE THE VEHICLE, IS LOW OR INTERRUPTED, THE FUEL SHUT OFF MAY NOT OCCUR.AS A RESULT, THE CUSTOMER COULD DRIVE THE VEHICLE WHILE THE STEERING COLUMN WAS LOCKED CAUSING THE DRIVER TO LOSE STEERING CONTROL AND POSSIBLY CRASH WITHOUT WARNING.GM WILL INSTRUCT OWNERS TO BRING THEIR VEHICLES TO A DEALER TO HAVE THE PCM REPROGRAMMED FOR MANUAL TRANSMISSION VEHICLES AND THE ELECTRIC COLUMN LOCK DISABLED FOR AUTOMATIC TRANSMISSION VEHICLES.ODI WILL MONITOR THE EFFECTIVENESS OF THE REMEDY IN THE MANUAL TRANSMISSION VEHICLES AND TAKE FURTHER ACTION IF WARRANTED.
Steering
IN 2001, GENERAL MOTORS (GM) ISSUED CUSTOMER SERVICE CAMPAIGNS 1044 AND 1044A TO ADDRESS A CONDITION WHERE THE STEERING COLUMN WOULD FAIL TO UNLOCK DURING THE INITIAL KEY-IN AND START-UP IN CERTAIN MY 1998-2000 CORVETTE VEHICLES.HOWEVER, ODI CONTINUED TO RECEIVE COMPLAINTS CONCERNING STEERING COLUMN LOCKUP ON CORVETTE VEHICLES.AS A RESULT, PE02-054 WAS OPENED AND LATER UPGRADED TO EA02-031 FOR MY 1997-2001 SUBJECT VEHICLES.ODI'S ANALYSIS IDENTIFIED CONCERNS WITH POST-REPAIR FAILURES IN VEHICLES SERVICED THROUGH THE CAMPAIGNS, AS WELL AS, FAILURES IN MY 1997-2003 SUBJECT VEHICLES NOT INCLUDED IN THE CAMPAIGNS.(NOTE: THE MANUFACTURER FAILURE DATA ABOVE IS LIMITED TO MY 1997-2003 VEHICLES THROUGH 10/17/2003.)ON FEBRUARY 6, 2004, GM NOTIFIED NHTSA OF A SAFETY DEFECT IN MY 1997-2004 CORVETTE VEHCLES EQUIPPED WITH MANUAL TRANSMISSIONS AND MY 1997-2000 CORVETTE VEHICLES WITH AUTOMATIC TRANSMISSIONS.THE NOTIFICATION STATED THAT IF THE VOLTAGE AT THE POWERTRAIN CONTROL MODULE (PCM), WHICH WAS DESIGNED TO SHUT DOWN THE FUEL SUPPLY WHEN THE STEERING COLUMN FAILED TO UNLOCK AND THE CUSTOMER TRIED TO DRIVE THE VEHICLE, IS LOW OR INTERRUPTED, THE FUEL SHUT OFF MAY NOT OCCUR.AS A RESULT, THE CUSTOMER COULD DRIVE THE VEHICLE WHILE THE STEERING COLUMN WAS LOCKED CAUSING THE DRIVER TO LOSE STEERING CONTROL AND POSSIBLY CRASH WITHOUT WARNING.GM WILL INSTRUCT OWNERS TO BRING THEIR VEHICLES TO A DEALER TO HAVE THE PCM REPROGRAMMED FOR MANUAL TRANSMISSION VEHICLES AND THE ELECTRIC COLUMN LOCK DISABLED FOR AUTOMATIC TRANSMISSION VEHICLES.ODI WILL MONITOR THE EFFECTIVENESS OF THE REMEDY IN THE MANUAL TRANSMISSION VEHICLES AND TAKE FURTHER ACTION IF WARRANTED.
PE02054 · Steering Column Lockup
Opened Jul 1, 2002 · Closed Nov 15, 2002
Status: closed (inferred from source dates) · Steering
SEE RESUME IN REPOSITORY.
EA00009 · Front Lap Belt Malfunction
Opened Mar 16, 2000 · Closed Apr 18, 2000
Status: closed (inferred from source dates) · Seat Belts
ODI OPENED THIS EA00-009 ON MARCH 16, 2000, TO CONTINUE ANALYSES BEGUN UNDER PRELIMINARY EVALUATION PE99-076.THE ALLEGED DEFECT: LAP BELT WEBBING IN BOTH SEATING POSITIONS TENDS TO FOLD OVER WHILE ENTERING THE RETRACTOR OPENING.THESE FOLDS FREQUENTLY IMPEDE PROPER WEBBING RETRACTION.IF THE RETRACTOR HAS BEEN INADVERTENTLY TOGGLED INTO AUTOMATIC LOCK RETRACTOR (ALR) MODE BY BEING EXTENDED TO ITS FULL LENGTH, IT MAY FAIL TO RESET ITSELF TO THE NORMAL EMERGENCY LOCK RETRACTOR (ELR) MODE.SUCH A CONDITION HAS BEEN SHOWN TO RENDER THE ACTIVE RESTRAINT UNUSABLE.CONCLUSION: GM WILL REMEDY THE ALLEGED DEFECT IN 71,569 SUBJECT VEHICLES BUILT PRIOR TO AUGUST 1999 BY ADDING WEBBING GUIDE INSERTS TO THE LAP RETRACTOR OPENINGS OF BOTH SEATING POSITIONS TO PREVENT THE ADMISSION OF FOLDED WEBBING ONTO THE RETRACTOR SPOOL.THIS ENGINEERING ANALYSIS HAS BEEN CLOSED.
PE99076 · Front Lap Belt Malfunction
Opened Dec 10, 1999 · Closed Mar 16, 2000
Status: closed (inferred from source dates) · Seat Belts
There is no summary currently available
PE99066 · Steering Column Lock Module
Opened Nov 8, 1999 · Closed Jul 21, 2000
Status: closed (inferred from source dates) · Steering
There is no summary currently available
1998 Chevrolet Corvette Problems, Complaints & Recalls | Skip That Year
Illustration