Engine complaints by model year
Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
What owners report
The component that malfunctioned is the engine starter relay, which is subject to an open BMW/NHTSA safety recall (issued September 2025) due to potential corrosion causing overheating, short circuits, and vehicle fire risk. The recall specifically advises parking the vehicle outside and away from structures until repaired. The vehicle is available for inspection upon request.My safety and the safety of my family were put at risk because the dealership (Capitol Nissan in San Jose) failed to disclose this critical fire-risk recall before or during the sale on January 4, 2026, despite it being noted on the provided Carfax report (without any explanation of its severity). …
The recall was issued more than 8 months ago but the remedy is still not yet available, which is very concerning as the problem may cause the event of fire even when the vehicle is parked. Issued SEP 23, 2025 Description of Problem It is possible for water to contact and enter the engine starter. This could lead to corrosion which could cause a short circuit. Safety Risk This could increase the risk of a thermal event or fire during driving or even when the vehicle is parked and the ignition is off.
The contact owns a 2019 BMW 430I. The contact stated that there was a coolant leak. The contact stated that the engine overheated and the vehicle stalled while driving. The message "Engine Overheating - Stop Vehicle Immediately" was displayed. The vehicle was towed to the local dealer, where it was diagnosed, and it was determined that the coolant housing needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the local dealer, where it was determined that the coolant water pump needed to be replaced. The vehicle was repaired, but the failure persisted. The vehicle was taken to the same local dealer, where it was diagnosed, and it was determined that there was coolant leaking from the oil housing. The vehicle was not repaired. The manufacturer was contacted, a complaint was filed, and the contact was referred to the NHTSA Hotline. …
The contact owns 2019 BMW 430I. The contact stated while the vehicle was parked, he noticed coolant was leaking underneath the vehicle onto the ground. Additionally, the contact stated while driving at various speeds, the message that the coolant level was low was displayed and the vehicle was overheating. The vehicle was taken to the dealer several times. The dealer diagnosed that the vehicle with a fractured coolant hose, and that the oil filter housing, and an unknown part connecting the engine block from the coolant reservoir needed to be replaced. The vehicle was repaired; however, the failure persisted. 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 40,000.
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. …
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
The contact owns a 2017 BMW 430I. The contact stated that while driving 70 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact stated that the vehicle then stalled. The contact was able to pull over to the side of the road. No warning light was illuminated. In addition, the contact stated there was an abnormal sound coming from the engine. The vehicle was restarted; however, the failure recurred. The vehicle was taken to the dealer. However, no cause for the failure was found. The contact stated there was an abnormal fuel burning odor entering the interior of the vehicle. The contact checked under the hood and noticed an oil leak outside the engine. The "Low Oil" warning light illuminated, even though the oil level on the instrument panel showed the level was normal. The contact added oil. However, no cause for the failure was found. …
The contact owns a 2017 BMW 430I. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer and was diagnosed with intrusion into the heat management module coolant. The contact was informed that the HMM (Heat Management Module) needed to be replaced. An unknown hose was replaced. The contact stated that since 2022, the vehicle had experienced three coolant failures. The vehicle was repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The contact related the failure to NHTSA Campaign Number: 18V465000 (ENGINE AND ENGINE COOLING); however, the VIN was not included. The failure mileage was approximately 65,000.
Related recalls (2)
Engine
BMW of North America, LLC (BMW) is recalling certain 2024 BMW 430i convertible vehicles. The cylinder head cover may develop cracks, resulting in oil leaking into engine compartment.
Remedy: Dealers will inspect and replace the cylinder head cover as necessary, free of charge. Owner notification letters were mailed February 14, 2024. Owners may contact BMW customer service at 1-800-525-7417.
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.
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.
Frequently asked questions
Which BMW 430i years have engine problems?
By NHTSA complaints, the 2018 (22), 2017 (13) and 2019 (11) model years. Engine complaints make up 61% of all complaints for the 2018.
Is there a recall for BMW 430i engine problems?
Yes — 2 recalls, including 23V-863 (engine, Dec 20, 2023); 18V-465 (engine, Jul 11, 2018). Recall repairs are free at authorized dealers; check a specific car with the VIN recall check.
At what mileage do BMW 430i engine problems start?
Across all years, half of the complaints with a recorded mileage happened before about 76,000 miles; 16% happened before 50,000 miles.
What part fails most often?
Owners most often name the cooling system › pump (1 mentions).
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.