2017 ROLLS-ROYCE DAWN

Typical onset: 40,000-80,000 mi

Symptoms: Excessive oil consumption (1-2 quarts per 1,000 miles), Blue smoke on cold start or hard acceleration, Loss of compression codes (P0300-series misfires), Metallic debris in oil during analysis

Fix: Piston ring lands crack due to heat cycling and carbon buildup. Requires complete engine teardown, new pistons, rings, and often cylinder honing or re-sleeving if bore scoring is present. 60-80 hours labor depending on extent of damage. Many shops recommend full short block replacement to avoid repeat failures.

Estimated cost: $35,000-55,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid pooling under vehicle center section, Low fluid warning on iDrive, Harsh shifting or delayed engagement when fluid is low, Pink residue on cooler lines

Fix: The external cooler develops pinhole leaks at crimped joints or internal corrosion. Replacement requires dropping subframe or partial transmission drop depending on access. 8-12 hours labor. Always replace cooler lines and flush system to prevent debris damage to valve body.

Estimated cost: $2,800-4,200

Typical onset: 60,000-100,000 mi

Symptoms: Vibration at idle in Drive, disappears in Park/Neutral, Clunk on acceleration or deceleration, Visible transmission sag when inspecting from below, Increased NVH on rough roads

Fix: Hydraulic transmission mount fails internally, allowing excessive movement. The 2-ton curb weight accelerates wear. Replace mount and inspect driveshaft center bearing simultaneously. 4-6 hours labor including alignment check.

Estimated cost: $1,800-2,600

Typical onset: 30,000-60,000 mi

Symptoms: Rough idle when cold, Hesitation or stumble on light throttle, P0171/P0174 lean codes, Reduced fuel economy

Fix: Direct injection means no fuel washing intake valves. Requires walnut shell blasting of all 12 intake ports. 10-14 hours labor due to V12 packaging. Must remove intake manifolds and plenums. Some shops recommend doing fuel injectors simultaneously if over 60k miles.

Estimated cost: $2,200-3,800

Symptoms: Top stuck mid-cycle or fails to latch, Hydraulic pump runs excessively or makes grinding noise, Fluid leaks visible at rear deck cylinders, Asymmetric top operation (one side slower)

Fix: Seven hydraulic cylinders and a complex control module manage the folding hardtop. Seals fail in cylinders or pump, causing slow operation or failure. Diagnosis requires dealer-level software. Individual cylinder replacement is 6-10 hours; pump replacement adds another 4-6 hours. Must bleed and calibrate system after repair.

Estimated cost: $4,500-8,500

Typical onset: 70,000-110,000 mi

Symptoms: P0299 underboost or P0234 overboost codes, Limp mode activation under load, Turbo whistle or flutter at part throttle, Loss of power above 3,000 RPM

Fix: Wastegate actuators carbon up or vacuum diaphragms fail on one or both turbos. Often both sides need attention simultaneously. Turbos accessible from underneath but require exhaust manifold removal. 12-16 hours labor per side if replacing actuators; 20-28 hours for complete turbo replacement if shaft play is present.

Estimated cost: $3,500-6,000 per side

Typical onset: 80,000-120,000 mi

Symptoms: White smoke from exhaust on startup, Coolant loss with no visible leaks, Overheat condition or overheating after spirited driving, Hydrocarbon contamination in coolant reservoir

Fix: Multi-layer steel head gaskets fail between water jackets and combustion chambers. Requires both cylinder heads off, machining check, ARP studs recommended. 50-70 hours labor. Many techs recommend replacing timing chains, guides, and VVT solenoids while heads are off. Often precursor to full engine failure if ignored.

Estimated cost: $18,000-28,000