2021 BMW X5 Reliability Score & Common Problems

Owners of the 2021 BMW X5 frequently report issues with the vehicle's back over prevention systems, particularly the rear cross traffic alert. Complaints describe the system failing to provide audio or visual warnings when backing out of parking spaces, with several owners noting that alerts do not activate until their vehicle is dangerously close to another object or person. One report involves a crash resulting in injury, where the vehicle's safety features, including obstacle detection, did not respond prior to impact. These issues are noted at various mileage points, with one owner experiencing problems around 11,000 miles. Buyers should be aware of these potential safety implications when considering this model.

Owners of the 2021 BMW X5 frequently report issues related to the water pump, with multiple complaints describing coolant leaks and the need for water pump replacement. Symptoms often include the coolant warning light illuminating and messages indicating dangerously low coolant levels. These issues are typically reported at mileage ranges from approximately 40,000 to 80,000 miles. Additionally, some owners mention problems starting the vehicle, characterized by a sputtering sound and starter failure. There are no reports of crashes, fires, or loss of control associated with these complaints, but potential buyers should be aware of these recurring mechanical issues.

Owners of the 2021 BMW X5 frequently report issues with the airbag system, particularly involving the passenger restraint system and the SRS unit located under the cupholder. Complaints often describe a "malfunctioning passenger restraint system" warning, and note that the airbag sensor may fail to detect seat occupancy correctly, impacting airbag deployment and seatbelt adjustment. Additionally, multiple owners highlight that the SRS unit is vulnerable to liquid damage due to its placement beneath a non-watersealed cupholder, leading to system failure notifications and vehicle immobilization. Two incidents involve crashes, one resulting in injury due to the deployment of the knee airbag. These issues are reported shortly after vehicle purchase, with one owner experiencing a problem within a week. Buyers should be aware of potential airbag system malfunctions and the risk of liquid damage affecting vehicle operation.

Owners report that the 2021 BMW X5 experiences starter motor failures. Complaints frequently mention that the engine starter fails, requiring replacement. Symptoms include the illumination of unknown warning lights while driving and during vehicle restarts. These issues have been reported around 44,000 miles. There are no reports of crashes, fires, or loss of control associated with these starter failures. Buyers should be aware of potential repair costs, as one owner reported paying over $2,000 for starter replacement.

Owners of the 2021 BMW X5 report issues with the panoramic sunroof and the auto dimming function of the mirrors. One owner describes an incident where the panoramic sunroof exploded while driving, indicating a potential safety risk. Additionally, multiple owners mention inconsistent performance of the auto dimming feature in the rearview and driver side mirrors, which can unexpectedly stop working during nighttime driving, leading to temporary blindness from headlights. BMW acknowledges the mirror issue as a known problem related to sensor positioning but has not yet provided a resolution. These issues appear without reference to specific mileage, suggesting they may occur at various points in the vehicle's lifespan.

Owners of the 2021 BMW X5 report issues related to steering, with specific complaints about vehicle shuddering and a loud rattling noise. The shuddering occurs when steering in low gear and is linked to incorrect transfer case fluid, which dealerships acknowledge through a service bulletin. This issue tends to arise around 62,000 miles and is resolved by replacing the fluid. Another complaint involves a loose steering linkage and leaking steering assembly, observed at 28,000 miles, which is not covered under existing recalls for the VIN in question. Both issues have potential safety implications, including the risk of impaired vehicle control.

Owners of the 2021 BMW X5 report issues with the braking system, particularly involving the brake pedal unexpectedly falling to the floor and causing sudden stops. Complaints frequently mention that these incidents occur at around 9,700 miles, often after the vehicle switches from hybrid to sport mode without user input. Both reports indicate that the master cylinder was replaced, but owners express concern over the lack of a clear explanation for the brake failure. Safety implications are noted, as the sudden braking could potentially lead to loss of control, especially at higher speeds. This information is valuable for potential buyers considering the reliability and safety of the braking system in this vehicle model.