AutoUtility currently tracks 59 official NHTSA owner defect complaints for the 2018 Chevrolet Impala. Powertrain & Transmission issues are the most frequently reported category, appearing in 11 complaints (18.6% of submitted records). Among these NHTSA complaint records, 6 filings cite a crash, 2 report one or more injuries.
Factual proportion of owner complaints categorized by automotive subsystem in NHTSA records
11 owner complaints submitted to NHTSA ODI for this subsystem.
11 owner complaints submitted to NHTSA ODI for this subsystem.
9 owner complaints submitted to NHTSA ODI for this subsystem.
7 owner complaints submitted to NHTSA ODI for this subsystem.
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"The transmission failed, shifting is no longer smooth. It hesitates and shakes the entire car, and the car slows down to almost a crawl uphill. I understand this is an issue with Chevrolet Impalas. So now I have an $8200 bill for a problem I was never told about, and that GM knew that it existed...."
"The contact owns a 2018 Chevrolet Impala. The contact stated that while the A/C was activated during the summer of 2025, the A/C failed to function as intended. The contact stated that hot air was blowing through the vents. No warning lights were illuminated. The vehicle was taken to an independent..."
"I was driving and parked the car at the store. After checking out I went to the car got ready to leave and started backing out and the car would not turn to the left at all. I took it to the shop and was told they do not see anything wrong with my car but a steering message is coming up."
"Passenger side front seat. When occupied, airbag sensor located inside the seat is malfunctioning. My husbands safety is at risk when he's in the car. He tries moving the seat up, back, etc. Sometimes works and the airbag sensor works. We are fearing that if there were any accident or need, that..."
"The contact owns a 2018 Chevrolet Impala. The contact stated that recently, the driver’s side air bag deployed while the vehicle was parked and unattended overnight. Prior to the failure, the air bag warning light had illuminated while driving. The local dealer was not contacted, and the vehicle..."
Reported defect complaint volume across sibling model years (2015–2020)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 Chevrolet Impala | 300 | 10 | 3 | View 2015 Problems → |
| 2016 Chevrolet Impala | 111 | 8 | 0 | View 2016 Problems → |
| 2017 Chevrolet Impala | 116 | 4 | 0 | View 2017 Problems → |
| 2018 Chevrolet Impala Current Page | 59 | 6 | 1 | Current |
| 2019 Chevrolet Impala | 28 | 4 | 1 | View 2019 Problems → |
| 2020 Chevrolet Impala | 15 | 3 | 0 | View 2020 Problems → |
Complete distribution of consumer defect reports across all 35 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Injury Entries | Fatality Entries |
|---|---|---|---|---|---|
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 8 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 6 | 0 | 0 | 0 | 0 |
| Steering NHTSA category: STEERING | 6 | 0 | 0 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 4 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 3 | 3 | 0 | 1 | 0 |
| Air Bags NHTSA category: AIR BAGS | 2 | 1 | 0 | 1 | 0 |
| AIR BAGS,SEATS,UNKNOWN OR OTHER | 2 | 0 | 0 | 0 | 0 |
| AIR BAGS,SEATS | 1 | 0 | 0 | 0 | 0 |
| Back Over Prevention / Camera NHTSA category: BACK OVER PREVENTION | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,EXTERIOR LIGHTING,ENGINE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,WHEELS | 1 | 0 | 0 | 0 | 0 |
| ELECTRONIC STABILITY CONTROL (ESC),ENGINE | 1 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 1 | 0 | 0 | 0 | 0 |
| ENGINE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| EXTERIOR LIGHTING | 1 | 0 | 0 | 0 | 0 |
| EXTERIOR LIGHTING,SERVICE BRAKES | 1 | 1 | 0 | 0 | 0 |
| EXTERIOR LIGHTING,VISIBILITY/WIPER | 1 | 0 | 0 | 0 | 0 |
| Fuel System NHTSA category: FUEL SYSTEM, GASOLINE | 1 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| Doors, Latches & Locks NHTSA category: LATCHES/LOCKS/LINKAGES | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,AIR BAGS,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,VEHICLE SPEED CONTROL | 1 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES, HYDRAULIC | 1 | 1 | 0 | 0 | 0 |
| STEERING,ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| SUSPENSION,WHEELS | 1 | 0 | 0 | 0 | 0 |
| Tires NHTSA category: TIRES | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,VISIBILITY/WIPER | 1 | 0 | 0 | 0 | 0 |
| VEHICLE SPEED CONTROL,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
Cross-reference safety recalls, crash test safety ratings, and EPA fuel economy for this model year
Key performance indicators, EPA fuel economy specs, powertrain variants, and summary ratings.
Official recall campaigns, safety defect descriptions, and manufacturer free remedy instructions.
NHTSA 5-Star NCAP crash test results, driver assistance systems, and rollover resistance ratings.
EPA fuel economy ratings, electric range, and annual energy cost benchmarks.
Direct, deterministic answers synthesized from verified United States government databases for the 2018 Chevrolet Impala
In official NHTSA consumer records, the most frequently cited issue area for the 2018 Chevrolet Impala is Powertrain & Transmission, appearing in 11 records (18.6% of submitted filings).
Secondary reported categories include Electrical System (11) and Brakes & Traction Control (9).
AutoUtility does not issue subjective reliability scores or commercial ratings. In official United States government records, NHTSA tracks 59 consumer defect complaints and 1 safety recall campaign for the 2018 Chevrolet Impala.
Reviewing documented component complaint distributions, recall remedy notices, and active federal investigations provides an objective, evidence-based view of the vehicle's historical safety and defect record.
Among consumer complaint records on file with NHTSA for the 2018 Chevrolet Impala, 6 filings cite a crash, 0 cite smoke or fire, and 2 report one or more injuries.
Incident entries represent consumer descriptions at the time of submission to federal authorities and do not establish mechanical causation or legal liability.
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database under 49 CFR Part 576.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.