2023 ROLLS-ROYCE DAWN

Typical onset: 15,000-40,000 mi

Symptoms: metallic knocking at idle that worsens under load, low oil pressure warnings, metal shavings in oil during analysis, sudden catastrophic seizure in worst cases

Fix: Complete engine-out teardown. Crankshaft typically needs machining or replacement, all main and rod bearings replaced, sometimes piston replacement if debris damage occurred. 60-80 labor hours at specialist shop. BMW/RR dealership often quotes full long-block replacement instead of rebuild.

Estimated cost: $35,000-65,000

Typical onset: 20,000-50,000 mi

Symptoms: excessive oil consumption (quart every 500-800 miles), blue smoke on cold start or deceleration, misfires and rough idle, loss of compression in one or more cylinders

Fix: Engine must come out. All pistons and rings replaced, cylinder honing or sleeving if scoring is deep, head gasket replacement while apart. 70-90 labor hours. Sometimes discovered during bearing failure diagnosis.

Estimated cost: $28,000-50,000

Typical onset: 25,000-60,000 mi

Symptoms: transmission slipping or harsh shifts, limp mode activation, milky or discolored transmission fluid (coolant contamination), overheating warnings

Fix: Oil cooler replacement requires transmission removal or extensive subframe work depending on approach. Contaminated fluid means full flush, sometimes valve body replacement if contamination was severe. 18-24 labor hours.

Estimated cost: $6,500-12,000

Typical onset: 30,000-70,000 mi

Symptoms: clunking on acceleration or deceleration, vibration at idle in Drive, excessive drivetrain movement visible during throttle transitions

Fix: Mount replacement requires supporting transmission and often exhaust removal for access. OEM mounts only, aftermarket doesn't hold up. 4-6 labor hours.

Estimated cost: $1,800-3,200

Typical onset: 40,000-80,000 mi

Symptoms: coolant loss with no visible external leaks, slight oil in coolant or vice versa, slight misfire codes bank-specific, white residue on dipstick

Fix: Both head gaskets on N74 require engine-out service due to packaging. While apart, resurface heads, replace all gaskets and seals, check for warpage. 50-65 labor hours. Often done preventively during bearing or piston repair.

Estimated cost: $18,000-28,000

Typical onset: 35,000-75,000 mi

Symptoms: delayed engagement into gear, harsh or erratic shifts between specific gears, transmission fault codes stored, intermittent limp mode

Fix: Requires pan drop, valve body removal to access solenoid pack. RR typically replaces entire mechatronic unit rather than individual solenoids. 8-12 labor hours with programming.

Estimated cost: $4,500-8,000

Symptoms: fuel smell in cabin or near rear of vehicle, fuel puddles under car after sitting, rough running or lean codes if severe

Fix: Housing assembly replacement, not just filter element. Common corrosion point on this chassis. 2-3 labor hours.

Estimated cost: $800-1,400