The 2011 BMW X5 35d is lauded by owners for its blend of comfort, reliability, and fuel efficiency, especially considering its size and capabilities. Many drivers appreciate it as a dependable daily vehicle that handles long distances with ease. However, like many modern diesel vehicles, the X5 35d can encounter issues related to its emissions control systems. For owners looking to maximize their vehicle’s performance and longevity, particularly in regions without stringent emissions testing, exploring a delete kit can be a compelling option.
One of the most frequently reported problems with the 35d, and similar diesel models, revolves around the AdBlue system. The AdBlue tank temperature sensor is known to be susceptible to failure due to the corrosive nature of the diesel exhaust fluid itself. Over time, the plastic AdBlue tank can also become brittle, sometimes necessitating a complete tank replacement even when only the sensor is faulty. Furthermore, the EGR system in these engines tends to accumulate significant carbon deposits within the intake manifolds and cylinder head. This build-up can require professional cleaning services roughly every 60,000 to 90,000 miles to maintain optimal engine performance. These maintenance needs are common across modern diesels adhering to strict emissions standards.
This is where the appeal of an emissions delete kit for a 2011 BMW X5 35d comes into focus. By removing components like the EGR system and potentially the AdBlue system (depending on the specific kit and local regulations), owners can proactively address these common failure points. The benefits extend beyond just preventing potential issues. Deleting the emissions system can lead to a noticeable improvement in fuel economy, often cited as a 10% or greater increase. Performance gains are also a significant draw, with some reporting horsepower increases in the range of 70 to 100hp after installing a delete kit and ECU tune. It’s important to note that these gains are typically realized when combined with proper engine tuning to optimize performance after the physical removal of emissions components.
Beyond emissions-related concerns, like any vehicle, the BMW X5 35d has routine maintenance needs. Tire wear is a point to consider, but often stems from improper wheel alignment. BMW’s factory alignment specifications are quite broad, which, if not carefully addressed, can lead to uneven tire wear, particularly on the inner edges. Ensuring a precise wheel alignment to exacting specifications, however, can significantly extend tire life. Owners should also anticipate replacing wear items such as brakes, batteries, and tires at regular intervals, as well as components like thermostats and potentially water pumps, typically around the 70,000 to 100,000-mile mark. Addressing a slightly underperforming thermostat promptly is advisable, as neglecting it on the 35d engine can lead to issues like glow plug failures down the line.
For those considering an upgrade, the F15 generation X5, starting in 2014, presents some interesting advancements. The F15 features an 8-speed transmission compared to the E70’s 6-speed, and different differential gearing, which contributes to improved highway fuel economy. While the F15 35d is a single-turbo design with slightly less horsepower on paper compared to the E70’s twin-turbo setup, the MPG gains might be attractive to some buyers. Aesthetically, opinions vary, with some preferring the look of the E70. Ultimately, both generations offer a compelling package.
In conclusion, the 2011 BMW X5 35d remains a highly regarded vehicle, offering a satisfying driving experience and robust reliability. Addressing the common emissions system concerns through a delete kit, where permissible, can unlock further potential in terms of performance and fuel efficiency, while also mitigating potential maintenance headaches. Paired with diligent routine maintenance, a 2011 BMW X5 35d can continue to be a rewarding vehicle for years to come.
