Problems · NHTSA complaints

2016 Scion IA problems

Owners filed 23 complaints about the 2016 Scion IA with NHTSA between Feb 2016 and Aug 2022. The most-cited component is engine (8).

Complaints
23
Filed with NHTSA
Crashes
6
Reported by owners
Fires
0
Reported by owners
Injuries
5
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine8
  2. Electrical system7
  3. Air bags6
  4. Power train5
  5. Service brakes4
  6. Vehicle speed control3
  7. Steering1
  8. Structure1
  9. Wheels1
  10. Other / unknown3

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 10, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20161
20175
20186
20195
20204
20210
20222

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Engine

8 reports1 crash
“Was getting off work. Started car and Engine system malfunction light, DSC malfunction light, TPMS System Malfunction light, Auto transmission malfunction light, and SCBS malfunction light all turned on. Car was not currently in motion when lights went on. Was in parking lot. Turned car off, and restarted, lights remained on. Drove vehicle 6.8 miles home, car was in limp mode. When at home used OBD2 scan tool and got codes P0847 C1031 U0401 B13D3 Cleared codes and unplugged 12 volt battery to reset system. Only engine system malfunction light remained. Parked car overnight and went to dealership next morning. Car drove on highway and car seemed fine. Dealership scan car and received code P0847, tech cleared code and test drove car. Problem can not be reproduced.”
Owner complaint to NHTSAFiled Jan 14, 2022Power train, Electrical system, EngineODI 11447451

Electrical system

7 reports
“MY CAR HAS UNDER 60,000 MILES, I BOUGHT IT WITH ABOUT 28,000 ON IT AND IT HAS HAD INTERMITTENT ISSUES WITH THE DISPLAY. I WENT TO DEALERSHIP, WHO SAID THE WHOLE INFOTAINMENT SYSTEM NEEDS REPLACED, WHICH IS ABOUT $1200 WITH PARTS AND LABOR. IT HAS BEEN DOING THIS WITH LESS THAN 30,000 MILES ON THE CAR AND HAS GOTTEN WORSE. IT CAUSES THE DISPLAY TO GO IN AND OUT, WHICH HAPPENS ALSO WITH THE BACKUP CAMERA.”
Owner complaint to NHTSAFiled Aug 28, 2020Electrical systemODI 11351758

Air bags

6 reports4 crashes
“TL* THE CONTACT OWNS A 2015 SCION IA. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 45 MPH, THEY CRASHED INTO A WILD HORSE. THE CONTACT STATED THAT NO AIR BAGS DEPLOYED. THE VEHICLE WAS TOWED AND A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED NO INJURIES AND NO MEDICAL ATTENTION WAS NEEDED. THE CONTACT HAD NOT CONTACTED THE DEALER. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE; HOWEVER, THE CONTACT HAD NOT HEARD FROM THEM AS OF YET. THE APPROXIMATE FAILURE MILEAGE WAS UNKNOWN.”
Owner complaint to NHTSAFiled Sep 10, 2020Air bagsCrash reportedODI 11354181

Power train

5 reports1 crash
“TRANSMISSION WHINE AFTER USED CAR PURCHASE WITH 91K MILES. TOOK IT TO TOYOTA OF GREENVILLE FOR DIAGNOSTIC. NEEDED A NEW TRANSMISSION. TOOK THE CAR BACK TO RALPH HAYES TOYOTA OF ANDERSON WHEW I PURCHASED AND THEY REPLACED THE TRANSMISSION. SINCE THEN THERE HAS BEEN A TRANSMISSION GRINDING AND SEVERE VIBRATION WHILE IN DRIVE OR REVERSE. I CALLED TOYOTA CUSTOMER SERVICE AND ASKED FOR A BUY BACK. THEY DECLINED. I ALSO COMPLAINED ABOUT THE DEALERSHIP AND THEIR LACK OF CARING AND UNDERSTANDING. TOYOTA CORPORATE DOES NOT CARE. DEALERSHIP KEEPS SAYING THIS VIBRATION AND BEHAVIOR IS NORMAL FOR THIS CAR. IT IS DANGEROUS NOW BECAUSE IT STALLS OUT INTERMITTENTLY WHEN PLACED IN DRIVE OR REVERSE. WHEN IT DOES GO IT LAUNCHES FORWARD. ALSO THE VIBRATION IS SO SEVERE IT WILL SHAKE THE TEETH IN MY MOUTH. I HAVE VIDEO ON MY PHONE OF THE TRANSMISSION ALSO HANGING UP IN GEAR AND THE DEALERSHIP AND TOYOTA CORPORATE DID NOT SEEM TO CARE I HAD PROOF THE NEW TRANSMISSION IS FAULTY. ALSO, THE INFOTAINMENT SYSTEM KEEPS CRASHING AND WAS QUOTED ALMOST $2,000 TO FIX IT. THEY ACKNOWLEDGE THAT'S A COMMON PROBLEM BUT REFUSE TO OFFER ANY ASSISTANCE TO FIX IT. ON TOP OF IT ALL THE BRAKES ARE…”
Owner complaint to NHTSAFiled Dec 22, 2019Power train, Air bags, Service brakesODI 11290769

Service brakes

4 reports
“2016 SCION IA. BRAKES MAKE LOUD NOISE WHEN APPLIED AFTER COLD START OR LONG PERIOD OF TIME ENGINE IS OFF. NOISE DISAPPEARS AFTER 3-5 BRAKE ATTEMPTS AND BRIEFLY SHOWS UP AGAIN AFTERWARDS. THIS ISSUE HAS BEEN HAPPENING FOR THE LAST 6 MONTHS.”
Owner complaint to NHTSAFiled Oct 9, 2018Service brakesODI 11139369

Vehicle speed control

3 reports1 crash
“SECOND TIME THIS HAPPENED...FIRST THEY SAID BATTERY...WHILE DRIVING, INDICATING WARNING LIGHTS ON DASH START BLINKING (ABS, CHECK ENGINE, TRACTION, AND OTHERS), THEN THE ENGINE GOES INTO LOW HEAR AND STAYS UNTIL THE VEHICLE IS TURNED OFF AND BACK ON. DURING THESE EPISODES THE SPEED ODOMETER IS ERRATIC. ALSO WHEN IN THIS STATE, THE REVERSE GEAR DOES NOT ENGAGE. WHEN THIS STARTED IT WAS A ONCE A MONTH PROBLEM, THEN WEEKLY, NOW IT HAPPENS DAILY/HOURLY. IT STARTED AT APPROXIMATELY 40,000 MILES. THIS HAPPENS WHILE DRIVING ON CITY STREETS AND HIGHWAY, MOST OF THE TIME AT STOPS AND LOWER SPEEDS BUT DOES HAPPEN ON FREEWAY TOO.”
Owner complaint to NHTSAFiled Mar 13, 2019Electrical system, Vehicle speed control, EngineODI 11186554
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.