2018 Bmw M4 Safety Report

2018 BMW M4 shows low complaint volume but recurring fuel tank leak issues and a critical seat belt recall.

5Complaints
1Recalls
65/100Reliability Score
Most reported components: Fuel/Propulsion System (4)Engine (1)

AI Safety Analysis for the 2018 Bmw M4

The 2018 BMW M4 exhibits a relatively low number of NHTSA complaints, with only 5 total reported. There are no reported crashes, fires, injuries, or deaths associated with these complaints, which is a positive indicator. However, a significant pattern emerges from the complaint data: 4 out of 5 complaints (80%) are related to the FUEL/PROPULSION SYSTEM, specifically fuel tank leaks. This suggests a potential systemic issue with the fuel tank, as multiple owners reported leaks after filling up, with descriptions mentioning cracks and expansion due to heat. In terms of recalls, the 2018 BMW M4 has one recall concerning the front seat belt Emergency Locking Retractors (ELR). This recall, affecting certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles, addresses a critical safety concern where an incompatible vehicle-sensitive locking mechanism could prevent the seat belt from properly restraining an occupant in a crash, increasing injury risk. While this is a serious safety defect, it is a single, specific issue that should be addressed by the recall. NHTSA crash test ratings for the 2018 BMW M4 are not available (N/A) for Overall, Frontal, Side, or Rollover categories. This lack of data makes it impossible to assess its performance in standardized crash scenarios. Despite the absence of crash test data, the low overall complaint volume and the specific nature of the fuel system complaints, alongside the single seat belt recall, paint a picture of a vehicle with a few concentrated safety concerns rather than widespread systemic failures. The fuel tank issue, however, is a significant concern due to the fire hazard it presents.

Reliability Score

The 2018 Bmw M4 receives a reliability score of 65 out of 100 based on analysis of NHTSA complaint data, recall history, crash reports, and safety ratings. This indicates average reliability — some notable concerns exist that prospective buyers should be aware of.

Known Issues for the 2018 Bmw M4

The following issues have been identified from NHTSA complaint data and owner reports for the 2018 Bmw M4:

IssueSeverityFrequencyTypical Mileage
Fuel Tank Leaks
Multiple reports of fuel tank leaks, often occurring after filling up, with descriptions of cracks and expansion, posing a fire risk.		 High Common under 50000 miles
Front Seat Belt Elr Malfunction
Recall for Emergency Locking Retractors (ELR) in front seat belts that may not properly restrain occupants in a crash.		 High Occasional N/A (recall related) miles
Crank Hub Issue
One complaint mentions a 'CRANK HUB ISSUE', which can lead to catastrophic engine failure.		 High Rare N/A (single report) miles

Common Problems Reported by Owners

Based on NHTSA complaint data, the following components account for the majority of reported issues with the 2018 Bmw M4:

Fuel/Propulsion System 80% of complaints

The most significant problem pattern involves fuel tank leaks, with 4 out of 5 complaints directly related to this component.

Engine 20% of complaints

One complaint references a 'CRANK HUB ISSUE', indicating a potential, though less frequent, engine-related concern.

Frequently Asked Questions About the 2018 Bmw M4

Is the 2018 BMW M4 safe?

Based on NHTSA data, the 2018 BMW M4 has a low overall complaint count (5 total) with no reported crashes, fires, injuries, or deaths. However, a significant safety concern is the recurring fuel tank leaks (4 out of 5 complaints) which pose a fire hazard. There is also a critical recall for front seat belt malfunctions that could affect occupant restraint in a crash. NHTSA crash test ratings are not available.

What are common problems for the 2018 BMW M4?

The most reported issues for the 2018 BMW M4 are related to the FUEL/PROPULSION SYSTEM, specifically fuel tank leaks, accounting for 80% of all complaints. Owners have reported fuel leaking from the tank, sometimes after filling up, due to cracks or expansion. There is also a recall for the front seat belt Emergency Locking Retractors.

Are there any recalls for the 2018 BMW M4?

Yes, there is one recall for the 2018 BMW M4. It concerns the front seat belt Emergency Locking Retractors (ELR) in certain convertible models. An incompatible locking mechanism could prevent the seat belt from properly restraining an occupant during a crash, increasing the risk of injury.

How serious are the fuel tank leaks?

The fuel tank leaks are a serious concern. Multiple complaints describe substantial fuel leaks, with owners expressing fear of fire or explosion. BMW itself advised one owner to immediately cease driving the car due to a fuel leak, highlighting the severity of this issue.

What is the 'Crank Hub Issue' mentioned in complaints?

One complaint for the 2018 BMW M4 mentions a 'CRANK HUB ISSUE'. While only a single report, this is a known potential problem in some BMW M engines that can lead to the crank hub slipping, resulting in significant engine damage or failure. It's a high-severity mechanical issue.

Buyer Advice

Our recommendation: Prospective buyers should be aware of the recurring fuel tank leak issue and ensure the seat belt recall has been addressed. A pre-purchase inspection focusing on the fuel system and engine (specifically the crank hub) is highly recommended.

NHTSA Data Summary for 2018 Bmw M4

This safety report is based on a comprehensive analysis of data from the National Highway Traffic Safety Administration (NHTSA) for the 2018 Bmw M4. The data includes 5 consumer complaints filed by vehicle owners, 1 manufacturer-initiated safety recalls, and safety rating assessments associated with this vehicle.

All data presented in this report is sourced from public NHTSA databases. Our AI analysis identifies patterns across complaint narratives, correlates them with recall history, and produces the safety assessment above. This analysis is updated as new complaints and recalls are filed with the NHTSA.

Consumers are encouraged to report vehicle safety problems to the NHTSA at nhtsa.gov. If your vehicle is subject to a recall, contact your dealer to schedule the free repair.