2018 BMW 4 Series Complaints

SEAT BELTS — Filed 01/02/2025

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

ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM — Filed 10/18/2024

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.

ENGINE AND ENGINE COOLING — Filed 01/17/2024

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.

ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE — Filed 12/06/2024

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.

ENGINE AND ENGINE COOLING — Filed 12/05/2024

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.

SEATS,ENGINE,LANE DEPARTURE — Filed 11/18/2020

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

ENGINE AND ENGINE COOLING — Filed 04/22/2024

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.

ENGINE — Filed 07/06/2024

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. 552(B)(6)

ENGINE — Filed 03/19/2024

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

POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE — Filed 03/01/2024

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.