2012 BENTLEY FLYING SPUR

Typical onset: 60,000-100,000 mi

Symptoms: Heavy white or blue smoke on cold start, Excessive oil consumption (1+ quart per 500 miles), Misfires and rough idle, Metal debris in oil or catastrophic knocking if rings fragment

Fix: Ring land failure on one or more pistons requires complete engine-out rebuild with all pistons, rings, bearings, and gaskets. Budget 60-80 hours labor for proper R&R and machine work. Many shops won't touch it; frequently ends up being a factory reman long-block.

Estimated cost: $25,000-45,000

Typical onset: 70,000-120,000 mi

Symptoms: Transmission fluid in coolant (strawberry milkshake in expansion tank), Coolant in transmission causing slipping and delayed shifts, Overheating transmission or engine temp spikes

Fix: Internal cooler inside the radiator assembly fails, cross-contaminating fluids. Requires new radiator assembly, full trans flush (sometimes multiple flushes), coolant system flush, and often transmission rebuild if contamination was severe. 12-16 hours labor if trans survives; add 40+ hours if trans rebuild needed.

Estimated cost: $3,500-6,000 (cooler only); $15,000-22,000 (with trans rebuild)

Typical onset: 50,000-90,000 mi

Symptoms: Heavy clunk on acceleration or deceleration, Vibration at idle in Drive, Visible transmission sag or misalignment

Fix: Hydraulic transmission mount and engine mounts deteriorate, allowing excessive drivetrain movement. Transmission mount is particularly failure-prone. Requires lift access and subframe support; 4-6 hours labor for trans mount, add 2-3 hours per engine mount.

Estimated cost: $1,200-2,500

Typical onset: 80,000-130,000 mi

Symptoms: Harsh or delayed shifts, particularly 2-3 or 3-4, Limp mode with transmission fault codes, Erratic shift points or stuck in one gear

Fix: ZF 6HP26 solenoid body assembly fails. Requires pan drop, valve body removal, and solenoid replacement. Many techs replace entire mechatronic unit for reliability. 8-12 hours labor including fresh fluid and adaptive resets.

Estimated cost: $2,800-5,500

Typical onset: 40,000-80,000 mi

Symptoms: Hard starting or extended crank time, Hesitation under acceleration, Low fuel pressure codes and limp mode, Rough idle or stalling

Fix: Fuel filter is buried under rear seat and often neglected; clogging starves the high-pressure pump. Filter service is 2-3 hours; if pump is damaged, it's another 6-8 hours labor for pump replacement. Always replace filter first and test.

Estimated cost: $600-1,200 (filter); $2,500-4,000 (pump)

Typical onset: 90,000-150,000 mi

Symptoms: Coolant loss with no visible leaks, White smoke from exhaust, Oil contamination in coolant or vice versa, Overheating or misfires

Fix: W12 configuration makes head gasket jobs nightmarish. Engine-out is strongly recommended for proper access to all 24 head bolts. 50-70 hours labor if doing both banks, plus machine work for head resurfacing. Often discovered during diagnosis of oil consumption issues.

Estimated cost: $18,000-28,000