AutoUtility currently tracks 14 official NHTSA owner defect complaints for the 2018 Chevrolet Sonic. Electrical System issues are the most frequently reported category, appearing in 5 complaints (35.7% of submitted records). Zero crashes, fires, injury reports, or fatality reports are cited across these complaint records.

Key Problem Findings
  • • Total NHTSA Complaints: 14 reports
  • • #1 Reported Problem Area: Electrical System (5 reports • 35.7% of submitted complaints)
  • • Secondary Problem Areas: Engine & Cooling (3), Fuel & Propulsion System (2)
  • • Crash-Citing Complaints: 0 filings
  • • Fire-Citing Complaints: 0 filings
  • • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Reporting Methodology: Statistics describe unverified consumer submissions voluntarily filed with NHTSA. Complaint volume is not normalized for vehicle sales volume or miles driven. Multiple components can be cited within a single owner complaint submission.
Total Complaints
14
Submitted to NHTSA ODI
Crash-Citing Complaints
0
Filings citing a collision
Fire-Citing Complaints
0
Filings citing smoke or fire
Complaints Reporting Injuries
0
Filings citing one or more injuries
Complaints Reporting Fatalities
0
Consumer filings citing fatalities

Most Reported Problems for 2018 Chevrolet Sonic

Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records

#1 Problem Area 35.7% of complaints

Electrical System

5 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#2 Problem Area 21.4% of complaints

Engine & Cooling

3 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#3 Problem Area 14.3% of complaints

Fuel & Propulsion System

2 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#4 Problem Area 14.3% of complaints

Air Bags & Restraints

2 owner complaints submitted to NHTSA ODI
✓ 0 crashes or fires cited
#5 Problem Area 14.3% of complaints

Seats & Interior

2 owner complaints submitted to NHTSA ODI
⚠️ NHTSA Recall Context

NHTSA records list 1 official safety recall campaign for this model year involving the same broad component area:

*Component overlap means an official recall exists for the same broad vehicle system. It does not establish that an individual owner complaint was caused by, covered by, or resolved through that recall.
✓ 0 crashes or fires cited
Domain Share Note: Share percentage represents the proportion of unique complaint filings referencing each vehicle system. Because single complaints may cite multiple systems (such as engine and electrical simultaneously), domain percentages represent individual category incidence and may sum to over 100%.

Recent NHTSA Owner Reports for 2018 Chevrolet Sonic

Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation

Engine & Cooling NHTSA ODI ID: #11675305
Filed: 07/22/2025

"Dear GM Executive Office, I am writing in frustration and disappointment after being told today by Chevrolet Customer Assistance that the case I opened (Case # [XXX]) was simply a "dealer complaint" and that no further help would be offered - despite my vehicle exhibiting a recurring,..."

Incident Date: 07/12/2025 • Raw NHTSA Component: ENGINE
Fuel & Propulsion System NHTSA ODI ID: #11661264
Filed: 05/15/2025

"The contact owns a 2018 Chevrolet Sonic. The contact stated that while driving at an undisclosed speed, the engine was idling roughly. The contact stated that the check engine warning light was illuminated. Additionally, the contact stated that the vehicle was consuming an excessive amount of fuel...."

Incident Date: 05/14/2025 • Raw NHTSA Component: FUEL SYSTEM, GASOLINE,ENGINE
Other / Miscellaneous NHTSA ODI ID: #11492498
Filed: 11/06/2022

"My car has had CAM shaft issues upon buying the car. I have taken the car to Chevrolet in Dallas and in Forney, TX and the car still has the same issue. My car engine check light has remained on and consulting a personal mechanic, they informed me that this could be a recall issue and that I should..."

Incident Date: 11/05/2018 • Raw NHTSA Component: UNKNOWN OR OTHER
Air Bags & Restraints NHTSA ODI ID: #11471326
Filed: 06/28/2022

"The contact owns a 2018 Chevrolet Sonic. The contact stated that while a 95-pound passenger was seated in the front passenger’s seat, the air bag system was deactivated. The vehicle was taken to the local dealer who was unable to determine a failure and indicated no failure was found. The..."

Incident Date: 01/21/2021 • Raw NHTSA Component: AIR BAGS
Fuel & Propulsion System NHTSA ODI ID: #11462831
Filed: 04/30/2022

"The has as well as mileage is not accurate and it constantly changes even while not driving which is adding more miles to car than actually is and you will never know how much gas you have in car truly which is safety concern especially if you are driving on interstate and can’t tell how much gas..."

Incident Date: 03/01/2022 • Raw NHTSA Component: ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM
Consumer Narrative Notice: Excerpts are sanitized text descriptions submitted by vehicle owners to the federal ODI database. They reflect the reporting consumer's observations at the time of filing and have not been independently confirmed by vehicle manufacturers or government investigators.

Complaint History for Chevrolet Sonic

Reported defect complaint volume across sibling model years (2015–2020)

Model Year NHTSA Complaints Crash Reports Safety Recalls Detailed Report
2015 Chevrolet Sonic 114 15 3 View 2015 Problems →
2016 Chevrolet Sonic 48 8 2 View 2016 Problems →
2017 Chevrolet Sonic 37 6 0 View 2017 Problems →
2018 Chevrolet Sonic Current Page 14 0 1 Current
2019 Chevrolet Sonic 8 0 0 View 2019 Problems →
2020 Chevrolet Sonic 10 0 0 View 2020 Problems →
Comparative Disclaimer: Complaint totals are unadjusted historical counts and are not normalized for vehicles sold, active fleet size, or total road mileage. Newer model years naturally have had less calendar exposure time to accumulate owner filings.

Detailed NHTSA Component Breakdown for 2018 Chevrolet Sonic

Complete distribution of consumer defect reports across all 13 granular NHTSA system and subsystem classifications

Vehicle Component / System Total Complaints Crash Reports Fire Reports Reported Injury Entries Reported Fatality Entries
Electrical System NHTSA category: ELECTRICAL SYSTEM 2 0 0 0 0
Air Bags NHTSA category: AIR BAGS 1 0 0 0 0
ELECTRICAL SYSTEM,ENGINE,VISIBILITY/WIPER 1 0 0 0 0
ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM 1 0 0 0 0
ELECTRICAL SYSTEM,WHEELS 1 0 0 0 0
Engine NHTSA category: ENGINE 1 0 0 0 0
EXTERIOR LIGHTING 1 0 0 0 0
FUEL SYSTEM, GASOLINE,ENGINE 1 0 0 0 0
PARKING BRAKE,SEATS,ENGINE 1 0 0 0 0
Seat Belts NHTSA category: SEAT BELTS 1 0 0 0 0
Seats & Restraints NHTSA category: SEATS 1 0 0 0 0
STEERING,WHEELS,UNKNOWN OR OTHER 1 0 0 0 0
Other / Uncategorized NHTSA category: UNKNOWN OR OTHER 1 0 0 0 0
Data Attribution & Reporting Methodology: Complaints are unverified voluntary submissions to the NHTSA Office of Defects Investigation (ODI). Because multiple vehicle components can be cited within a single owner complaint submission, component-level rollups may sum to more than the unique complaint count (14). Injury and fatality entries in the detailed table reflect raw values entered by reporting consumers across individual submissions; they are not deduplicated casualty statistics and may include duplicate or unverified entries. Complaint volume is not normalized for sales volume or vehicle mileage and does not represent an audited component failure rate.

Related Official Reports for 2018 Chevrolet Sonic

Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year

Official US Government Data Provenance

The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.

Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.