BMW 6 Series (E63/E64)
The E63/E64 6 Series is a striking grand tourer based heavily on the E60 5 Series platform, returning the '6' badge to the BMW lineup with controversial Bangle-era styling. Positioned as a luxurious coupe or convertible for affluent buyers, it suffers from massive depreciation, making it cheap to buy but incredibly expensive to run in the UK. It shares the E60's complex electronics and notorious engine issues, particularly the valve-stem seals on the V8 models. It suits brave enthusiasts who want a fast, heavy luxury cruiser and have extremely deep pockets for specialist maintenance.
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Common Faults & Reliability
These are the most common documented problems for the BMW 6 Series (E63/E64), sorted by their typical impact and frequency.
V8 Coolant Pipe Leak (N62)
high severityA coolant pipe running through the center of the V8 engine block leaks. The official fix is engine-out, but expanding "stent" pipes exist.
Valve Stem Seal Leak (N62)
high severityThe V8 engines burn massive amounts of oil and blow blue smoke when pulling away after idling. Seals harden and fail.
Convertible Roof Sensor Failure
medium severityOn the E64 convertible, the complex array of microswitches in the roof mechanism often fail, preventing operation.
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