The 2017 BMW X5 xDrive35i occupies a sweet spot in the luxury SUV market, pairing a turbocharged inline-six engine with BMW’s signature all-wheel-drive system. While owners often praise its refined ride and spacious interior, like any complex machine, the 2017 model year has specific issues that potential buyers should understand before committing to a purchase.
Overview of the 2017 Model Year
Introduced as a mid-cycle refresh, the 2017 X5 brought subtle exterior tweaks, updated infotainment technology, and incremental engineering changes under the hood. The xDrive35i, in particular, benefited from a power increase over its predecessor, delivering responsive acceleration while maintaining relatively good fuel economy for its class. This update aimed to address some early criticisms regarding the previous generation’s rear visibility and infotainment interface, making it a more refined daily driver.
Common Mechanical and Electrical Issues
Despite its premium positioning, the 2017 X5 xDrive35i is not immune to mechanical gremlins. Several recurring themes appear in owner forums and technical service bulletins that prospective buyers should be aware of.
Valve Cover Gasket Leaks
One of the most frequently reported issues involves the valve cover gaskets. Due to the complex layout of the N55 engine and the heat cycles the engine endures, these gaskets can dry out and crack over time. When this happens, oil seeps into the spark valve cover, creating a messy appearance and potentially causing oil to drip onto the exhaust manifold, producing a burning smell. While not an immediate safety hazard, it requires monitoring and eventual repair to prevent further engine damage.
High-Pitched Whining Noise
A less common but more concerning issue is a high-pitched whining or squealing noise that emanates from the front of the engine. This sound is often attributed to the high-pressure fuel pump or the timing chain tensioner. In some cases, this can be an early warning sign of impending failure, which could lead to significant engine damage if left unaddressed. Owners experiencing this symptom are advised to have the vehicle inspected immediately by a qualified technician familiar with BMW engines.
Electrical Gremlins and iDrive Glitches
The 2017 X5 relies heavily on its electronic systems, and with complexity comes the potential for failure. Some owners report intermittent issues with the iDrive system, including frozen screens, unresponsive touchpads, or Bluetooth connectivity problems. Additionally, the operation of the power liftgate can be erratic, sometimes failing to auto-close or requiring multiple attempts to respond to the remote key fob. These issues often require a visit to the dealer for a software update or module replacement.
Performance and Drivetrain Concerns
The xDrive35i’s AWD system is generally robust, but it is not without potential pitfalls. Understanding how the system operates can help owners identify when something is amiss.
Transfer Case and Differential Wear
The xDrive system uses a transfer case to distribute power between the front and rear wheels. Over time, the fluid within this unit can degrade, leading to increased noise or a sensation of "slip" during aggressive acceleration. Furthermore, the rear differential, a component prone to wear in many BMWs, can develop play or whine if the fluid is not changed at the recommended intervals. Ignoring these symptoms can lead to costly repairs down the line.
The Infotainment and Comfort Features
While not "problems" in the mechanical sense, the user experience of the 2017 X5’s interior technology can be a source of frustration for new owners.
