YearToAvoid

2018 BMW 330i Problems, Recalls & Reliability

Verdict

Caution

Complaint Index

60/100

#5 most-complained of 11 330i years

The 2018 BMW 330i carries a Complaint Index of 60 and ranks 5th worst out of 11 model years, earning a Caution verdict. NHTSA lists 32 complaints, 1 recall, and 3 fires, with Engine problems the top issue at 50% of complaints.

Complaints
32
Recalls
1
Crashes / fires
0 / 3
Injuries / deaths
1 / 0
NHTSA overall rating
Not rated
EPA combined MPG
27
23 city / 33 hwy

Top 2018 BMW 330i problems

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

  1. Engine16 (50%)
  2. Other6 (19%)
  3. Fuel System5 (16%)
  4. Electrical System4 (13%)
  5. Brakes1 (3%)
  6. Collision Avoidance & Cameras1 (3%)
  7. Seat Belts1 (3%)
  8. Steering1 (3%)
  9. Structure & Body1 (3%)
  10. Suspension, Wheels & Tires1 (3%)

What owners report

  • Owners describe engine coolant leaks and smoking that led to visits to BMW service for coolant system repairs.
  • Some owners report an electrical fire starting in the rear of the vehicle, traced in one case to a short in the rear window defroster wiring.
  • Several complaints describe run-flat tires blowing out on the highway, causing vibration, pulling, and in one case rim damage.
  • One owner reported a sudden loud engine knock followed by loss of power and a check-engine warning, diagnosed as failed rod bearings with metal shavings in the oil.
  • A driver noted rear brake pads worn down to the metal near 40,000 miles with no warning light alert.
  • One owner reported the electric power steering becoming stiff and manual after a popping noise, alongside collision-warning and pedestrian-warning lights turning on.
2018 BMW 330i complaints: complaints filed per month3Jul 2018Nov 2020Oct 2022Dec 2023Aug 2024Feb 2025Aug 2025
39 complaints filed with NHTSA from Jul 2018 to Mar 2026; peak Oct 2022 (3).

2018 BMW 330i recalls

1 NHTSA recall campaign list this model year.

  1. NHTSA 18V465000Jul 11, 2018Engine5,309 vehicles

    Engine and engine cooling:engine

    BMW of North America, LLC (BMW) is recalling certain 2018 BMW 540d xDrive vehicles. The crankshaft sensor may be equipped with incorrect firmware, preventing the sensor from properly processing input from the crankshaft reluctor ring, possibly resulting in a vehicle stall. On September 12, 2018, BMW expanded the recall to a total of 5,309 vehicles including certain 2018-2019 BMW 540d xDrive, 230i M240i, M240i xDrive, X2 sDrive28i, X2 xDrive28i, X1 sDrive28i, X1 xDrive28i, 330i, 330i xDrive, 340i, 340i xDrive, 330i xDrive Gran Turismo, 530i, 530i xDrive, 540i, 540i xDrive, 530e, 530e xDrive, 640i xDrive Gran Turismo, 330e, 2019 430i Gran Coupe, 430i xDrive Gran Coupe, 440i Gran Coupe, 440i xDrive Gran Coupe, 430i, 430i xDrive, 440i, 440i xDrive, 740i, 740i xDrive, MINI Cooper, Cooper S, JCW, MINI Countryman (Cooper, Cooper All4, Cooper S, Cooper S All4, JCW All4), and MINI Clubman (Cooper, Cooper S, Cooper All4, Cooper S All4, JCW All4) vehicles.

    Risk: A vehicle stall can increase the risk of a crash.

    Remedy: BMW will notify owners, and dealers will replace the crankshaft sensor, free of charge. The recall began September 6, 2018. Owners may contact BMW customer service at 1-800-525-7417.

2018 BMW 330i fuel economy and fuel cost

City
23 MPG
Highway
33 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 330i years

Complaint Index by model year (0 = fewest issues, 100 = most)025507510020102011201720182019202020212022202320242025
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2011No verdict1003—
2017Caution5041026
2018Caution6032127
2019Avoid9041927.5
2020Avoid100521129

All BMW 330i years: best and worst →

Frequently asked questions

Is the 2018 BMW 330i reliable?
NHTSA data gives the 2018 330i a Complaint Index of 60 with a Caution verdict, ranking 5th worst among the 11 model years with data. It has fewer complaints than the 2019-2021 model years but more than several other years.
What are the most common problems with the 2018 BMW 330i?
Engine issues make up 50% of complaints (16 of 32), followed by Fuel System at 16% and Electrical System at 13%. Median mileage at failure across the model is 36,500 miles.
Does the 2018 BMW 330i have any recalls?
NHTSA lists 1 recall for the 2018 330i, campaign 18V465000, involving a crankshaft sensor with incorrect firmware. None of the recalls are do-not-drive recalls.
Are there fire risks with the 2018 BMW 330i?
NHTSA lists 3 fire-related complaints for the 2018 330i, including reports of fires originating in the Electrical System and Fuel System, with 1 reported injury.
How does the 2018 330i compare to other years?
The 2018 330i's Complaint Index of 60 is lower than the 2019 (90), 2020 (100), and 2021 (80) model years, which carry Avoid verdicts, but higher than the 2022 model year, rated Best with an index of 20.

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.