YearToAvoid

2018 BMW 320i Problems, Recalls & Reliability

Verdict

Caution

Complaint Index

67/100

#3 most-complained of 7 320i years

NHTSA lists 21 complaints for the 2018 BMW 320i, giving it a Complaint Index of 67 and a rank of 3rd worst out of 7 model years. Electrical System issues lead at 33% of complaints, followed by Engine at 29%. No recalls have been issued for this year.

Complaints
21
Recalls
0
Crashes / fires
6 / 0
Injuries / deaths
3 / 0
NHTSA overall rating
Not rated
EPA combined MPG
27
23 city / 35 hwy

Top 2018 BMW 320i problems

NHTSA owner complaints by component group. Groups with 15+ complaints have their own page.

  1. Electrical System7 (33%)
  2. Engine6 (29%)
  3. Fuel System5 (24%)
  4. Airbags4 (19%)
  5. Brakes4 (19%)
  6. Other3 (14%)
  7. Transmission & Powertrain3 (14%)
  8. Steering1 (5%)
  9. Structure & Body1 (5%)

What owners report

  • Airbags fail to deploy in a crash, sometimes with injury reported at low mileage around 3,900 miles.
  • Owners describe sudden unintended acceleration causing collisions, with one incident reported at 14,000 miles.
  • Brakes reportedly fail to stop the car despite hard pedal pressure, with the vehicle lunging forward before stalling.
  • Complete electrical system shutdown occurs while driving, including loss of steering assist at highway speed.
  • Phone calls reportedly drop repeatedly due to connectivity problems traced to the electrical system.
  • Rodents were found chewing wiring in the engine compartment, damaging speaker wiring and causing electrical faults.
2018 BMW 320i complaints: complaints filed per month4Mar 2018Jul 2020Mar 2023Nov 2023Nov 2024Sep 2025Jul 2026
34 complaints filed with NHTSA from Mar 2018 to Jul 2026; peak Nov 2025 (4).

2018 BMW 320i recalls

No safety recalls on record for this model year.

2018 BMW 320i fuel economy and fuel cost

City
23 MPG
Highway
35 MPG
Combined
27 MPG
Annual fuel cost (EPA)
$2,950
15,000 mi/yr
Fuel
Premium
Current regular gas
$4.32/gal
national avg.

EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.

2018 compared with other 320i years

Complaint Index by model year (0 = fewest issues, 100 = most)02550751002012201320142015201620172018
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2016Avoid8325027
2017Good339027
2018Caution6721027

All BMW 320i years: best and worst →

Frequently asked questions

Is the 2018 BMW 320i reliable?
NHTSA data shows 21 complaints for the 2018 320i with a Complaint Index of 67, ranking it 3rd worst among 7 model years, so it earns a Caution verdict relative to other years.
What is the biggest problem with the 2018 BMW 320i?
Electrical System complaints are the most common, making up 33% of all reported issues, followed by Engine problems at 29%.
Does the 2018 BMW 320i have any recalls?
NHTSA lists 0 recalls for the 2018 320i, though other model years of the 320i have recall records.
How does the 2018 320i compare to other years?
The 2018 320i has a Complaint Index of 67, better than the 2014 (100, Avoid) and 2016 (83, Avoid) model years but worse than the 2013 (17, Best) and 2017 (33, Good) model years.
What is the fuel economy of the 2018 BMW 320i?
The 2018 320i is rated at 27 mpg combined (23 city / 35 highway) with an annual fuel cost of $2,950 according to the EPA.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.