AI Damage2018 BMW X4: common problems
Owners of the 2018 BMW X4 filed 11 complaints with NHTSA, most often about electrical system and engine and cooling. The maker issued 58 service bulletins for this year. We found 1 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 11
- involving a crash
- 2
- Technical service bulletins (TSB)
- 58
- YouTube repair videos
- 1
What fails most often
- 1 Electrical system 64% of all complaints
- 2 Engine and cooling 45% of all complaints
- 3 Engine 27% of all complaints
- 4 Powertrain 9% of all complaints
- 5 Service brakes 9% of all complaints
- Electrical system: 7 complaints (64% of all); manufacturer bulletins for this component: 12.
- Engine and cooling: 5 complaints (45% of all); manufacturer bulletins for this component: 9.
- Engine: 3 complaints (27% of all); manufacturer bulletins for this component: 4.
- Powertrain: 1 complaints (9% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 4.
- Service brakes: 1 complaints (9% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 3.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2 L · petrol · turbo · 4 cyl
- 3 L · petrol · turbo · 6 cyl
- automatic, 8-speed
Drive: AWD
Symptoms owners describe
How many of the 11 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 7 | 0 | 12 |
| Engine and cooling | 5 | 0 | 9 |
| Engine | 3 | 0 | 4 |
| Powertrain | 1 | 1 | 4 |
| Service brakes | 1 | 1 | 3 |
| Equipment | 0 | 0 | 18 |
| Air bags | 0 | 0 | 5 |
| Structure | 0 | 0 | 4 |
| Fuel system | 0 | 0 | 3 |
| Lane departure | 0 | 0 | 3 |
| Suspension | 0 | 0 | 3 |
| Visibility | 0 | 0 | 3 |
| Wheels | 0 | 0 | 3 |
| Backover prevention | 0 | 0 | 2 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
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.
The contact stated no warning light was illuminated. The contact stated that the failure had been the cause of a recent crash at a traffic signal. The contact's vehicle had slipped into park (P) when the signal light changed to green her vehicle did not move forward and the vehicle behind her crashed into the rear…
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 morning, the 3rd.
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.
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 that parts were not available.
I got 2018 bmw x4 and 7year/80000km warranty from [dealer] vancouver on jun 25,2019.I used to drive to seattle to shopping and eating. I and my husband drived this car from vancouver to edmonton on jun 1,2022. On jun 4,the engine sign and change oil sign all light up .
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,457 of 2,102 model years in the NHTSA data (among the 31% least complained about).
On average one model year of the X4 has 7 complaints (11 years in the data). This year has 11, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been…
The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
- The vehicle applies the brakes on its own when reversing onto an inclined roadway or driveway
This appliesonly to the situation where the Active PDC option is activated via the iDrive.
- The limited warranty for the Knee Air Bag wire harness repair cable procedure for defects in materials and…
The limited warranty for the Knee Air Bag wire harness repair cable procedure for defects in materials and / or workmanship has been extended to 10 years / 120,000 miles as determined from the original first in-service…
- the NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15…
the NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
- The NVLD limited emission related warranty for defects in materials or workmanship has been extended to 15…
The NVLD limited emission related warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.
- EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150
- While driving the vehicle on normal roads at10mph and above, a "cracking" sound from the top of the…
While driving the vehicle on normal roads at10mph and above, a "cracking" sound from the top of the B-pillar(s) is heard.
- During inspection and/or diagnosis there is noticeable dirt/grease buildup on the axles near the inner…
During inspection and/or diagnosis there is noticeable dirt/grease buildup on the axles near the inner and/o router CV boots.
- One or more of the LED daytime running lights are dim or discolored
- The basic conditions for initializing the power windows are not met
- The Check Control message below appears even though the coolant level is not below minimum when theengine…
The Check Control message below appears even though the coolant level is not below minimum when theengine is cold. Check Control message (ID 166): Top up coolant.
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few…
The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important…
NHTSA lists 58 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other years of this model
Questions and answers
What are the most common problems with the 2018 BMW X4?
Owner complaints to NHTSA most often mention: electrical system, engine and cooling, engine. Total complaints: 11. The most frequent symptoms in complaint texts: overheating, coolant loss (18%), warning lights, check engine (18%), brake failure (9%).
How many service bulletins (TSB) were issued for the 2018 BMW X4?
NHTSA lists 58 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 BMW X4 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.