2014 — 2019
4.4L (N63) - xDrive50i V8 Twin-Turbo
Petrol
Check this by monitoring the cooling system during your test drive. | Advice: In cars of this age, the N63 engine produces significant heat; keep an eye on the digital temperature gauge to ensure it remains stable, as the plastic cooling components can become brittle over time.
While driving at low speeds, gently apply the brakes. | Advice: Listen for any unusual vibrations or sounds, as the heavy curb weight of the X6 can accelerate wear on bushings and control arms, which might manifest as a slight shimmy in the steering wheel.
Check this by inspecting the engine bay for any oil residue. | Advice: Take a look around the valve covers and oil filter housing; the N63 V8 features many seals that may eventually require attention as they reach higher mileage.
While parked with the engine running, cycle through all gear selections. | Advice: Ensure the ZF 8-speed transmission shifts smoothly without hesitation, as a well-maintained gearbox is essential for the performance of a high-output engine like the xDrive50i.
Usually the time to evaluate suspension bushings and engine mounts for any signs of fatigue.
A common point to check auxiliary drive belts, pulleys, and ensure the cooling system components are performing as intended.
Consider having a specialist verify the condition of the turbocharger oil lines and vacuum lines.
Prioritize oil changes every 10,000km to keep the twin-turbo internals happy.
Inspect the condition of the run-flat tires regularly, as they can wear unevenly on these performance setups.
Keep up to date with brake fluid flushes to ensure the safety systems remain responsive.
Ensure the iDrive system software is updated to keep your connectivity features running smoothly.
Check the battery health periodically, as modern BMWs are quite sensitive to voltage fluctuations.
Estimated repair costs if issues arise
If this component needs attention in the future, it is a significant job involving the top end of the engine. Depending on the car's history, you might eventually need to budget for this to ensure the V8 continues running efficiently.
The air suspension provides a lovely ride, but as they age, the rubber bladders can eventually leak. You may want to budget for a pair replacement if you notice the vehicle sitting unevenly after being parked.
To keep the engine operating in its optimal range, you might eventually need to budget for a refresh of the water pump and primary hoses as preventative maintenance.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer