YearToAvoid

2018 BMW 330i Reliability Data: Problems & Recalls

Caution The 2018 BMW 330i has a complaint index of 67, ranking 6th worst out of 16 model years, with a Caution verdict. Engine problems dominate, making up 50% of its 32 NHTSA complaints, alongside one recall for a crankshaft sensor issue.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
67/100
#6 of 16 330i years
Verdict
Caution
vs. other years of this model
Complaints
32
unique NHTSA reports
Recalls
1
distinct NHTSA campaigns
Crashes
0
reported in complaints
Fires
3
Injuries
1
Top issue
Engine
Best nearby year
2022
rated Good
NHTSA overall rating
Not rated
EPA combined MPG
27
23 city / 33 hwy
Injuries / deaths
1 / 0

Top 2018 BMW 330i problems

Share of this year’s NHTSA 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%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Engine coolant systems have failed, with owners reporting smoke from the engine bay and coolant breaking or leaking, sometimes leading to overheating and reduced acceleration.
  • Electrical wiring shorts, including in the rear window defroster, have led to fires starting in the rear seat or C-pillar area with visible flames and smoke.
  • Some engines developed a loud knock followed by a check-engine warning and power loss, traced to failed rod bearings with metal shavings found in the oil.
  • Panoramic sunroof glass has shattered suddenly while driving at highway speed, even without impact.
  • Run-flat tires have blown out on the highway, causing severe vibration and pulling, with one case damaging the wheel rims.
  • Electric power steering has suddenly stiffened and become manual after warning lights activated, following a popping noise.
2018 BMW 330i complaints: complaints filed per month2Jul 2018Nov 2020Oct 2022Dec 2023Aug 2024Feb 2025Aug 2025
32 complaints filed with NHTSA from Jul 2018 to Mar 2026; peak Aug 2022 (2).

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)0255075100’05’06’07’08’09’10’11’17’18’19’20’21’22’23’24’25
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2011No verdict2703—
2017Caution5341026
2018Caution6732127
2019Avoid8741927.5
2020Avoid93521129

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 67 and a Caution verdict, ranking 6th worst among the 16 model years with data. Engine problems account for half of its 32 complaints.
What is the most common problem with the 2018 BMW 330i?
Engine issues are the top problem area, making up 50% of complaints, with a median failure mileage of 38,250 miles. Fuel system and electrical system problems follow.
Does the 2018 BMW 330i have any recalls?
NHTSA lists one recall for the 2018 330i, campaign 18V465000, involving a crankshaft sensor with incorrect firmware. It is not a do-not-drive recall.
How does the 2018 330i compare to other BMW 330i years?
The 2018 model's complaint index of 67 is worse than 2017 (53) and better than 2019 (87), 2020 (93), and 2021 (80), all of which carry Avoid verdicts.
Were there fires reported in the 2018 BMW 330i?
NHTSA lists 3 fire incidents among the 32 complaints, including reports of electrical wiring shorts and smoke from the engine, with 1 reported injury.

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.