AutoUtility currently tracks 11 official NHTSA owner defect complaints for the 2018 BMW X4. Engine & Cooling issues are the most frequently reported category, appearing in 8 complaints (72.7% of submitted records). Among these NHTSA complaint records, 2 filings cite a crash, 1 cites a fire.
- • Total NHTSA Complaints: 11 reports
- • #1 Reported Problem Area: Engine & Cooling (8 reports • 72.7% of submitted complaints)
- • Secondary Problem Areas: Electrical System (7), Brakes & Traction Control (1)
- • Crash-Citing Complaints: 2 filings
- • Fire-Citing Complaints: 1 filings
- • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Most Reported Problems for 2018 BMW X4
Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records
Engine & Cooling
NHTSA records list 1 official safety recall campaign for this model year involving the same broad component area:
- Campaign #24V608000 ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP
Electrical System
Brakes & Traction Control
Powertrain & Transmission
Recent NHTSA Owner Reports for 2018 BMW X4
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"We heard a whining sound under the hood on November 1st, 2025. Prior to noticing this noise, there were no warming lamps or messages appearing. Following a short drive we smelled burning in the garage. We did not drive the vehicle the following day and intended to take it to our mechanic on Monday..."
"The water pump was found to have extreme corrosion after several other components on the car were damaged from the coolant leak into the electrical system. The car was suddenly losing power while driving and the DME was smoking, potentially causing an engine fire. So far the water pump, Digital..."
"The contact owns a 2018 BMW X4. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The dealer was contacted on several occasions; however, the contact was informed..."
"Unknown: Dealership replaced my brakes however they weren’t working properly I reported it 3 times BMW said it was common about 2 weeks later I was involved in a car accident where the brakes failed to respond and I rear ended another car."
"Water pump completely failed and no longer working. I had to pull off of road on a busy interstate. Firestone confirmed water pump no longer working. Vehicle is at BMW service center. No warning until vehicle overheated and warning came on."
Complaint History for BMW X4
Reported defect complaint volume across sibling model years (2015–2025)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 BMW X4 | 0 | 0 | 5 | View 2015 Problems → |
| 2016 BMW X4 | 10 | 1 | 2 | View 2016 Problems → |
| 2017 BMW X4 | 3 | 0 | 2 | View 2017 Problems → |
| 2018 BMW X4 Current Page | 11 | 2 | 1 | Current |
| 2019 BMW X4 | 10 | 0 | 7 | View 2019 Problems → |
| 2020 BMW X4 | 14 | 1 | 10 | View 2020 Problems → |
| 2021 BMW X4 | 6 | 0 | 8 | View 2021 Problems → |
| 2022 BMW X4 | 3 | 0 | 6 | View 2022 Problems → |
| 2023 BMW X4 | 7 | 2 | 3 | View 2023 Problems → |
| 2024 BMW X4 | 3 | 1 | 2 | View 2024 Problems → |
| 2025 BMW X4 | 1 | 0 | 2 | View 2025 Problems → |
Detailed NHTSA Component Breakdown for 2018 BMW X4
Complete distribution of consumer defect reports across all 7 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Reported Injury Entries | Reported Fatality Entries |
|---|---|---|---|---|---|
| ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM | 5 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE | 1 | 0 | 1 | 0 | 0 |
| Engine NHTSA category: ENGINE | 1 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 1 | 1 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 1 | 1 | 0 | 0 | 0 |
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
Official NHTSA Defect Investigations (1)
Formal safety defect inquiries and engineering analyses opened by the NHTSA Office of Defects Investigation (ODI)
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...
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.
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