Bentley Mulsanne
The Bentley Mulsanne, produced from 2010 to 2020, was the final flagship to be handcrafted entirely at Bentley’s headquarters in Crewe, successfully preserving the brand’s traditional "hewn from granite" feel. Avoiding the shared Audi/VW platforms used in the Continental GT range, the Mulsanne utilized a bespoke chassis and the iconic 6.75-litre "L-Series" V8 engine—a lineage stretching back to the 1950s. In the UK, it represents the absolute pinnacle of British luxury, prized for its peerless "waftability," hand-stitched leather interior, and a level of road presence that establishments it as a more characterful and bespoke alternative to the Rolls-Royce Ghost. Reliability for the Mulsanne is generally high for a hand-built car, reflecting the under-stressed nature of its massive V8 engine, but used buyers must navigate specific high-cost maintenance themes. The most common technical concern involves the air suspension system, where rubber air springs can perish or connecting lines can crack over time, often resulting in an uneven ride height and expensive corner repairs. Additionally, due to the vehicle’s immense 2.7-tonne weight, it is exceptionally hard on its braking and suspension components, with front discs and bushes being common MOT failure points. Owners also report occasional "gremlins" in the earlier infotainment systems, including Bluetooth connectivity glitches and slow radio reception. When buying a used Mulsanne in the UK, a full Bentley or recognized specialist service history is absolutely non-negotiable, as missing a scheduled service on such a complex vehicle is a major red flag. Prospective owners should listen for any "whining" from the power steering pump and check for misting in the front sidelight units after a test drive. It is also vital to check the deep, hand-finished paint for "swirl marks" and verify that the 12V battery is healthy, as these cars are highly sensitive to low voltage. A well-maintained Mulsanne remains one of the most prestigious and rewarding luxury vehicles on the used market, offering a unique "Old World" charm that no modern, mass-produced SUV can replicate.
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Common Faults & Reliability
These are the most common documented problems for the Bentley Mulsanne, sorted by their typical impact and frequency.
Power Steering Pump Failure
high severityThe hydraulic steering pump can fail, leading to heavy steering or noisy operation.
Coolant Expansion Tank Leaks
medium severityThe plastic expansion tanks can crack or the seals can fail, leading to slow coolant loss.
6.75L V8 Turbo Oil Feed Line Leaks
high severityThe legendary 6.75-litre V8 uses turbo oil feed lines that can develop leaks as they age, leading to oil consumption, potential turbo damage, and in severe cases engine bay fires if oil contacts hot exhaust components.
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