2018 BMW 430I problems, complaints & recalls

Updated from NHTSA data · How we count

Owners have filed 34 complaints with NHTSA about the 2018 BMW 430I, most often about engine. There is 1 recall for this model year.

Complaints
34
Recalls
1
Crashes
4
Fires
2
Injuries
3
Median mileage
57,000 mi
at time of problem

Key facts

  • Engine is the most-reported problem area, named in 22 of 34 complaints (65%).
  • Seats & Seat Belts (7) and electrical system (4) follow.
  • Half of the complaints that list mileage happened before 57,000 mi.
  • Owners reported 4 crashes, 2 fires and 3 injuries.
  • The 2018 BMW 430I has 1 recall on file.
  • NHTSA has opened 1 defect investigation covering this vehicle.
  • It has the most serious complaint record of all 10 BMW 430I model years we track.
  • That is 48% more complaints than the 2017 model year (23).

2018 BMW 430I problems by category

  • Engine · 2 crashes
    22 complaints
  • Seats & Seat Belts · 2 crashes
    7 complaints
  • Electrical System · 1 crash
    4 complaints
  • Airbags · 1 crash
    2 complaints
  • Transmission & Drivetrain
    2 complaints
  • Fuel, Hybrid & EV Propulsion
    2 complaints
  • Brakes · 1 crash
    2 complaints
  • Driver Assistance & Safety Tech · 1 crash
    2 complaints
  • Wheels & Tires
    1 complaints
  • Other / Unknown
    1 complaints
  • Acceleration & Cruise Control
    1 complaints
  • Visibility & Wipers
    1 complaints

A complaint can mention more than one problem area, so categories add up to more than the total.

Most-reported components

Component (as filed with NHTSA)Complaints
Engine14
Engine and engine cooling7
Seat belts4
Electrical system4
Seats3
Air bags2
Fuel/propulsion system2
Power train2

When problems happen (mileage)

Under 10k210k–30k530k–60k660k–100k100k–150k150k+
Mileage at the time of the problem, for 2018 BMW 430I complaints that list mileage.

2018 BMW 430I recalls (1)

  • Recall 17V507000Aug 16, 201767 vehicles
    SEAT BELTS:FRONT

    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.

    Risk: If the vehicle has an incompatible vehicle-sensitive locking mechanism, the seat belt may not restrain the seat occupant in the event of a crash, increasing the risk of injury.

    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.

NHTSA defect investigations

  • EA21002Opened Sep 17, 2021Open

    Desiccated Air Bag Inflator Rupture

    From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.C…

Recent 2018 BMW 430I complaints

Excerpts of the newest owner complaints, lightly cleaned of personal details. Complaints are unverified owner reports.

  1. Filed Aug 5, 2026FLDriver Assistance & Safety TechElectrical System
    I am reporting a potential safety defect involving water intrusion into the amplifier location on my BMW F33. According to the dealer's diagnosis, water entered the area containing the amplifier, causing failure of the audio system and the loss of audible safety warnings and alerts. As a result, the vehicle no longer provides audible safety notifications that are intended to warn the driver of potentially hazardous conditions. I believe this condition is caused by a design…
    NHTSA complaint #11754952 · source
  2. Filed Jun 2, 2026CACrashAirbags
    The steering wheel airbag has a cut mark, and it feels softer than the rest of the airbag cover. It looks like it may be starting to open.
    NHTSA complaint #11741538 · source
  3. Filed May 20, 2026FLEngine
    The car has experienced numerous coolant leaks according to the dealer and independent authorized service shops including: - turbo coolant lines - oil filter housing - auxiliary radiator - coolant pump - heat management module - upper radiator hose - expansion tank hose - various other coolant hoses All of this work has been done starting at 46,000 miles and continuing through the current mileage of 88,000 miles. Complete loss of coolant in system disabled the vehicle…
    NHTSA complaint #11738943 · source
  4. Filed Mar 11, 2026NYEngine
    2018 430i x drive gran coupe oil filter housing failed. Car started to overheat while driving and the infotainment system indicated that the car is overheating and started to decelerate.
    NHTSA complaint #11723706 · source
  5. Filed Jan 19, 2026TXAirbagsSeats & Seat Belts
    A few months ago, June 18, 2025 my 2018 BMW 430i convertible, which has 57,202 miles on the odometer, alerted me that the passenger side restraint system was malfunctioning. BMW declined to address the issue. Now, I am receiving the same notification for the driver side. Once again, BMW refuses to provide repairs. This poses a significant safety risk, as my airbags could potentially deploy unexpectedly during normal driving, and my seatbelts may fail to secure me in the…
    NHTSA complaint #11711900 · source
  6. Filed Aug 14, 202566,690 miCAElectrical SystemEngine
    The contact owns a 2018 BMW 430I. The contact stated that the vehicle was taken to a local dealer for routine service, and the vehicle was diagnosed and the contact was informed that the water pump was leaking and needed to be replaced. The low coolant level warning light was illuminated. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 24V608000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM) as a possible cause for the failure. The manufacturer…
    NHTSA complaint #11680742 · source
  7. Filed Aug 8, 2025NYEngine
    Disconnect coupling on cylinder head broke caused loss of coolant from engine. Overheated my Car damaged the engine and the car did accelerate when I was crossing a highway almost causing a collision
    NHTSA complaint #11679358 · source
  8. Filed Mar 18, 202574,000 miCAElectrical SystemEngine
    The contact owns a 2018 BMW 430I. The contact stated that while the vehicle was parked, the contact discovered that there was an unknown liquid leaking underneath the vehicle. The coolant warning light was illuminated. The vehicle was taken to a dealer, where it was diagnosed that there was a leak in the water pump and that the water pump needed to be replaced. The contact researched and became aware of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling; Electrical…
    NHTSA complaint #11649102 · source

Compare the 2018 BMW 430I with another vehicle →

Other 2018 BMW models

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data, as of Oct 10, 2026. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology