The 2018 BMW 4 Series is associated with 34 official NHTSA owner defect complaints and 1 safety recall campaign in the federal safety database. The most frequently reported component area is Engine & Cooling, accounting for 6 reports (18% of total complaints). EPA testing covers 15 certified vehicle configurations spanning 2l 4-cyl and 3l 6-cyl configurations. Gasoline and hybrid variants deliver 23 to 27 MPG combined. Detailed NHTSA crash-test ratings are not available in the current AutoUtility dataset for this model year. The 2018 BMW 4 Series belongs to the 1st generation (F32/F33/F36) 4 Series platform spanning model years 2015–2020.

Key Data Findings
  • • NHTSA Owner Complaints: 34 reports
  • • Safety Recall Campaigns: 1 campaign
  • • Top Reported Defect Area: Engine & Cooling (6 / 18%)
  • • Safety Incident Signals: 5 crash / 2 fire / 6 injury reports
  • • NHTSA Overall Safety Rating: Not rated by NHTSA
  • • EPA Efficiency: 23–27 MPG (15 variants)
Data Note: Compiled directly from official NHTSA Office of Defects Investigation (ODI), NHTSA 5-Star Safety Ratings, and EPA FuelEconomy.gov databases.
Fuel Economy
23–27MPG
15 EPA certified variants (2l 4-cyl and 3l 6-cyl configurations)
Reported Complaints
34
34 submitted owner reports
Safety Recalls
1
1 official NHTSA recall
NCAP Safety Rating
Not rated by NHTSA

What is the fuel economy and range of the 2018 BMW 4 Series?

Official EPA laboratory test ratings, electric driving range, and annual energy cost estimates by certified vehicle variant

Variant Engine Drivetrain Transmission City Highway Combined EV Range Est. Annual Fuel Cost
430i Convertible 2L 4-Cyl Rear-Wheel Drive Automatic (S8) 24 MPG 34 MPG 27 MPG — $2,800 / yr
430i Coupe 2L 4-Cyl Rear-Wheel Drive Automatic (S8) 24 MPG 34 MPG 27 MPG — $2,800 / yr
430i xDrive Coupe 2L 4-Cyl All-Wheel Drive Automatic (S8) 23 MPG 33 MPG 27 MPG — $2,800 / yr
430i Gran Coupe 2L 4-Cyl Rear-Wheel Drive Automatic (S8) 24 MPG 34 MPG 27 MPG — $2,800 / yr
430i xDrive Gran Coupe 2L 4-Cyl All-Wheel Drive Automatic (S8) 23 MPG 33 MPG 27 MPG — $2,800 / yr
430i xDrive Convertible 2L 4-Cyl All-Wheel Drive Automatic (S8) 22 MPG 32 MPG 26 MPG — $2,900 / yr
430i Coupe 2L 4-Cyl Rear-Wheel Drive Manual 6-spd 21 MPG 33 MPG 25 MPG — $3,050 / yr
440i Coupe 3L 6-Cyl Rear-Wheel Drive Automatic (S8) 21 MPG 32 MPG 25 MPG — $3,050 / yr
440i xDrive Coupe 3L 6-Cyl All-Wheel Drive Automatic (S8) 21 MPG 31 MPG 25 MPG — $3,050 / yr
440i Gran Coupe 3L 6-Cyl Rear-Wheel Drive Automatic (S8) 21 MPG 32 MPG 25 MPG — $3,050 / yr
440i xDrive Gran Coupe 3L 6-Cyl All-Wheel Drive Automatic (S8) 21 MPG 31 MPG 25 MPG — $3,050 / yr
440i Convertible 3L 6-Cyl Rear-Wheel Drive Automatic (S8) 21 MPG 29 MPG 24 MPG — $3,150 / yr
440i xDrive Convertible 3L 6-Cyl All-Wheel Drive Automatic (S8) 20 MPG 29 MPG 23 MPG — $3,300 / yr
440i xDrive Coupe 3L 6-Cyl All-Wheel Drive Manual 6-spd 19 MPG 29 MPG 23 MPG — $3,300 / yr
440i Coupe 3L 6-Cyl Rear-Wheel Drive Manual 6-spd 19 MPG 29 MPG 23 MPG — $3,300 / yr
Data Boundary Note: EPA specifications are shown by certified vehicle configuration. NHTSA complaints and recall totals are recorded at the model-year level across all configurations.

What are the crash test safety ratings for the 2018 BMW 4 Series?

Official 5-Star Safety Ratings evaluated by the National Highway Traffic Safety Administration

Tested Drivetrain / Cab Variant Overall Rating Frontal Crash Side Crash Rollover Rating Rollover Risk
C AWD —
2 DR AWD —
4 DR AWD —
C RWD —
2 DR RWD —
4 DR RWD —
Active Driver Assistance Systems (NHTSA Recorded): Forward Collision Warning (FCW) is documented as Optional and Lane Departure Warning (LDW) is documented as Optional in official NHTSA records for tested 2018 BMW 4 Series models.
View complete 2018 BMW 4 Series crash test & safety breakdown →

What defect complaints are reported for the 2018 BMW 4 Series?

Summary of 34 verified consumer defect submissions filed with the NHTSA Office of Defects Investigation (ODI)

Total Complaints
34
Crash Reports
5
Fire Reports
2
Complaints w/ Injury
6
Total Injuries
9

Top Reported Problem Categories

Ranked by total consumer complaint submissions recorded by NHTSA

Engine & Cooling 6 complaints
Engine 5 complaints
Seat Belts 3 complaints
ELECTRICAL SYSTEM,UNKNOWN OR OTHER 2 complaints
Seats & Restraints 2 complaints (1 crash)

Data Attribution & Context: Complaints are self-reported by vehicle owners to NHTSA and represent unverified consumer submissions. Complaint volume does not equal a statistically controlled failure rate and is not adjusted for total vehicles sold or cumulative mileage driven.

View all 2018 BMW 4 Series problems & component breakdown (20 categories) →

Are there open safety recalls on the 2018 BMW 4 Series?

Manufacturer safety recall campaigns monitored and recorded by NHTSA

NHTSA Campaign #17V507000 Active Recall
Affected Component: SEAT BELTS:FRONT

Defect Summary: BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assemblies may have been produced with incompatible vehicle-sensitive locking mechanism housings.

Free Manufacturer Remedy: BMW will notify owners, and dealers will inspect and, if necessary replace, the front seat belt assemblies, free of charge. The recall began October 13, 2017. Owners may contact BMW customer service at 1-800-525-7417.
View all 2018 BMW 4 Series recalls & campaign history (1 campaigns) →
Official US Government Data Provenance

The specifications, safety ratings, defect reports, and recall campaigns published on this page are retrieved directly from official United States Government agency databases:

  • NHTSA Office of Defects Investigation (ODI): Consumer complaints and defect reports.
  • NHTSA New Car Assessment Program (NCAP): Frontal, side, and rollover 5-Star crash safety test ratings.
  • U.S. EPA / FuelEconomy.gov: Standardized multi-cycle dynamometer fuel economy, MPGe, and electric driving range ratings.

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