2018 BMW 430I Owner Complaints

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 defect that allows water intrusion and creates an unreasonable safety risk. Research indicates BMW has issued technical service information addressing this condition. I have not taken possession of the vehicle because I am concerned about operating it without functioning audible safety warnings.

NHTSA ID

11754952

Incident

Jul 20, 2026

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 ID

11741538

Incident

Feb 1, 2026

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 putting driver at risk of being stranded, potential permanent damage of motor due to overheating, and loss of use of the vehicle on numerous occasions. Low coolant warning indicator only comes on when the coolant tank is dangerously low. Most leaks have been detected from inspection and diagnostic testing by authorized service shops. The number of coolant leaks has cost over $10,000 in repairs and excessive depreciation of the vehicle causing financial hardship. Full service records are available upon request.

NHTSA ID

11738943

Incident

Feb 2, 2023

Oil Filter Housing failed causing immediate loss coolant rendering the vehicle inoperative.

NHTSA ID

11725522

Incident

Mar 4, 2026

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 ID

11723706

Incident

Apr 4, 2025

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 event of an accident. During my online search, I found a recall for the same issues, the same year and model; however, my VIN was not included in that recall. I am apprehensive about driving my vehicle, as it may be a potential death trap. I believe BMW needs to acknowledge and take responsibility for this serious dangerous defect. My car is currently at the dealership, so I do not have an invoice at this time. Can NHTSA help me with this issue?

NHTSA ID

11711900

Incident

Jan 7, 2026

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 was notified of the failure. The approximate failure mileage was 66,690.

NHTSA ID

11680742

Incident

Oct 16, 2024

Mileage

66,690 mi

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 ID

11679358

Incident

Jun 12, 2025

Seatbelt alert pops up and noise sounds even when seatbelt is already buckled

NHTSA ID

11656217

Incident

Jan 2, 2025

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 System); however, the VIN was not included. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 74,000.

NHTSA ID

11649102

Incident

Oct 18, 2024

Mileage

74,000 mi

The contact owns a 2018 BMW 430I. The contact stated while driving at an undisclosed speed, the vehicle lost motive power. The vehicle was restarted; however, the failure persisted. The vehicle was driven to a local parking lot and then to the residence. The vehicle was later towed to the dealer where it was diagnosed with coolant pump failure. The contact was informed that the coolant pump needed to be replaced. The vehicle was not repaired. In addition, the contact stated that the coolant pump was previously replaced and covered under an unknown recall repair a year prior to the failure. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was unknown.

NHTSA ID

11636564

Incident

Jan 17, 2024

I pulled out onto Southside Blvd. My brakes failed, my driver’s front of the car hit a Waste Management garbage truck right back tire and cut the sidewall of the tire. The engine was racing, the truck pulled off the road, and I had sudden unintended acceleration. I immediately turned into a strip center and my car was racing through the strip center, the brakes were not working, the car controls were not working, and I turned the ignition switch off and the car stopped. The car had to be towed. Presently my insurance company has issued an estimate to repair the cosmetic issues, but not the mechanical issues.

NHTSA ID

11630502

Incident

Dec 6, 2024

The contact owns a 2018 BMW 430I. The contact stated while driving at an undisclosed speed, the engine started overheating with the low coolant warning light illuminated. The contact parked and left the vehicle at a local dealer. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not included in SIB: 17 01 21 (Service Action: Replace the Coolant Vent Line on the Cylinder Head) and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 80,769.

NHTSA ID

11629099

Incident

Dec 5, 2024

Mileage

80,769 mi

Front driver seat , keep sliding when u hit on breaks on the left legs where seat controls are located the balance between right thigh and left thigh is not well measured so becomes increasingly uncomfortable when thicker person driving the car, could cause an accident and risky, Engine problem - so many coolant leak which has cost me over 6000 dollars to repair and yet Still leaking, when I switch to spot mode this coolant overheat and thrn Another leaking, switch to sports plus more coolant leak Second the seat belt holder, a system is design to hand over the seat belt when doors close the that holder keep missing the seat belt or couldn’t drag it to you I’ve seen this in many of the bmw Another incident I notice when you reverse there’s crack or skip between the tires u could feel it like car is shaking reversing especially when wheel turn all the to the end

NHTSA ID

11627063

Incident

Nov 18, 2020

The contact owns a 2018 BMW 430I. The contact stated that while the dealer was servicing the vehicle, the dealer informed the contact there were several coolant leaks found. The dealer advised the contact to regularly add coolant to the vehicle. Additionally, the contact stated while driving 40-50 MPH, the vehicle experienced reduced power. Several unknown warning lights were illuminated. The messages "Vehicle Engine Heating - Drive Moderately" and "Drivetrain Malfunction" were displayed. The contact noticed a significant amount of smoke coming from underneath the hood and there was smoke inside the cabin of the vehicle. The contact pulled over to the side of the road, turned off and exited the vehicle. The vehicle failed to restart and was towed to the residence. The vehicle was then towed to a Collision Center, where it was inspected. The Collision Center informed the contact that the engine combusted and several parts under the hood had melted. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 75,000.

NHTSA ID

11616045

Incident

Apr 22, 2024

Mileage

75,000 mi

In Oct 2022, I was driving normally and suddenly got a message on the dash saying something like "Coolant low, please top up when you have a chance". A minute or so later, I got the red warning "Engine Overheated, turn off engine when safe" and it went into limp mode, and I pulled over immediately and had to flatbed my car to a dealer. Then told me there was a coolant leak (which I was not aware and there was no error message regarding coolant prior to the incident.) And they told me there was a recall on my vehicle coolant vent line. Although I had check NHTSA website frequently and did not see anything being recalled. They replaced the coolant vent line for free. Fast forward 21 months and less than 5000 miles later, I brought the car in for oil change. Upon inspection of my vehicle, the technician noticed some fluid seeping through the turbo coolant feed line and there were buildups. Please see video here. [XXX] . They suggested replacing the turbo coolant feed line and turbo return light for $2,500! I mentioned the incident two years ago due to a coolant leak that was being recalled, if this is related. They told me the recall was only the coolant vent line. The issue now is the turbo coolant feed line and return light. And over time, the coolant just "starts to leak on those lines due to its material". This is a 6 year old mildly driven vehicle with 35K miles. How can the coolant line material so bad that it would start to leak after 5+ years? Found some threads online and there were other people having the same issue. The manufacture should have put in some quality coolant lines. There were other recall in other models (18V755) for regarding a coolant leak that may result in an engine fire, which increases the risk of a crash and injury. If the line material of my coolant feed and return line by nature will start to leak after five years, wouldn't it be the manufacture's responsibility to remedy it before it cause safety issue? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C

NHTSA ID

11599543

Incident

Jul 6, 2024

My BMW 430i 2018showed no warning and suddenly the car started to shake, I stopped immediately and after the car cooled, there was no coolant, the oil temperature gage was always on normal. The car overheated and caused catastrophic engine failure, and need replacement. Upon inspection by several mechanics, its obvious the coolant leak from a hose that connects with engine block

NHTSA ID

11580162

Incident

Mar 19, 2024

When I cold started the car it rattled and shook, this stopped and the car was fine to drive. When I was on the road the cars check engine light came on and the car suddenly slowed down. An error popped up saying that there is a “powertrain malfunction”. BMW dealership said that it is a failure in VANOS system. There was a recall on other BMW models expect mine, 2018 BMW 4 series.

NHTSA ID

11575651

Incident

Mar 1, 2024

CAR WAS ON THE HIGHWAY GOING 80 MILES COOLANT LIGHT CAME ON CAR DROPPED SPEED TO 30 MILES PER HOUR ON ITS OWN

NHTSA ID

11570643

Incident

Feb 7, 2024

The contact owns a 2018 BMW 430I. The contact stated that while driving with the front driver's side seat belt buckled, the seat belt failed to restrain as needed. Additionally, the contact stated that the front driver's side seat belt failed to retract when unbuckled. The vehicle was taken to the dealer and the contact was provided an estimate to repair the front driver's side seat belt. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact there would be no assistance because the VIN was not included in NHTSA Campaign Number: 17V507000 (Seat Belts). The failure mileage was approximately 77,000.

NHTSA ID

11567026

Incident

Oct 10, 2022

Mileage

77,000 mi

The contact owns a 2018 BMW 430I. The contact stated that while driving at an undisclosed speed, the low coolant level warning light illuminated on the instrument panel, prompting the contact to refill the coolant reservoir. However, within two weeks, the failure reoccurred. After a visual inspection of the engine compartment, the contact observed an abnormally low coolant level. The vehicle was taken to an independent mechanic, who determined that the coolant was leaking from the reservoir hose. The vehicle was not repaired. After investigating the failure, the contact related the failure to Service Action: 17-01-21. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 57,000.

NHTSA ID

11558749

Incident

Nov 15, 2023

Mileage

57,000 mi

I was driving along the road and my car without warning overheated. I was able to drive to a safe place and park and contacted BMW of Southpoint Durham, NC. I was told that there was a recall on the hose which caused the car to overheat. I was told that they are waiting for BMW to issue the corrected/replacement hose for the car and in the meantime they would put a temporary hose on the car. I was told to pay out of pocket and then be reimbursed when the correct hose is issued by BMW. Many others had this same issue. BMW of Southpoint received the correct hose 2023 and put it on my car but now BMW is saying there was no recall. My safety and others were at risk because the engine could have caught fire, it could've caused me to lose control and crash. I had to sit on the side of the road for hours and could've been hit by another vehicle. Vehicle was inspected by BMW of Southpoint. There were no warning signs. lamps or messages prior to the car overheating. This happened February/March of 2022. Since then I was told letters had been sent out for a service update.

NHTSA ID

11529089

Incident

Feb 13, 2022

The contact owns a 2018 BMW 430I. The contact stated that while driving approximately 45 MPH, the warning message "Pull Over Vehicle Will Shut Off" was suddenly displayed and the vehicle stalled. The vehicle was towed to the local dealer who diagnosed that the coolant hose was faulty and caused damage to the water pump. The coolant hose and water pump were replaced and the failure was remedied. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 49,000.

NHTSA ID

11485700

Incident

Sep 19, 2022

Mileage

49,000 mi

Lumbar support automatically inflates without driver pushing button. This causes the driver to become distracted, uncomfortable and losing focus trying to deflate lumbar support while driving. Has not been inspected but I did ask dealer about this being an issue. No warning of any kind alerts driver of inflation of lumbar.

NHTSA ID

11473196

Incident

May 9, 2022

The contact owns a 2018 BMW 430i. The contact stated while attempting to start the vehicle, the low coolant/add coolant warning light illuminated. The contact stated she saw a coolant leak underneath the engine. The vehicle was not drivable. The contact towed the vehicle to an independent mechanic and was informed that the water pump needed to be replaced. The vehicle was repaired but experienced the failure a second time. The vehicle was not drivable. The contact towed the vehicle back to the independent mechanic and was informed that the water pump needed to be replaced a second time. The vehicle was being repaired at the time of the call. A dealer was not contacted. The manufacturer had been informed of the failure. The failure mileage was approximately 54,348. The contact stated that the part was replaced by a private mechanic.

NHTSA ID

11472672

Incident

Jan 1, 2022

Mileage

54,348 mi