2018 TOYOTA SUPRA

Typical onset: Can occur as early as 5,000-30,000 mi, some at 60,000+

Symptoms: Harmonic balancer wobble or separation, Sudden catastrophic engine failure, Metallic noise from front of engine, Crankshaft position sensor codes

Fix: Early B58 engines (pre-2021 production) had poorly pressed crank hubs that can separate. Requires engine removal, crankshaft replacement, and often collateral damage repair (timing chain, oil pump, bearings). 40-60 hours labor depending on damage extent. Toyota extended warranty coverage on some VINs.

Estimated cost: $8,000-15,000

Typical onset: 40,000-80,000 mi

Symptoms: Harsh shifting or banging into gear, Limp mode with transmission fault codes, Slipping between gears, Check engine light with P17XX codes

Fix: ZF 8-speed has a known mechatronic sleeve seal issue causing fluid contamination and valve body problems. Requires transmission removal, mechatronic replacement or rebuild. 12-16 hours labor. Some dealers cover under goodwill if caught early.

Estimated cost: $3,500-6,500

Typical onset: 30,000-70,000 mi

Symptoms: Long crank or no-start condition, Rough idle and misfires under load, Loss of power at high RPM, P0087 fuel pressure code

Fix: High-pressure fuel pump (BMW part) can fail prematurely, especially with low-quality fuel. Pump is on the engine side, requires intake manifold removal for access. 4-6 hours labor. Use OE BMW or Bosch replacement only.

Estimated cost: $1,200-2,000

Typical onset: 50,000-90,000 mi, sooner with spirited driving

Symptoms: Excessive drivetrain clunk on throttle transitions, Vibration at idle, Transmission thunk when shifting, Visible mount tearing or fluid leakage

Fix: Hydraulic mounts wear faster with high torque of turbo I6. Transmission mount is notorious for early failure. Replace as a set for best results. 3-5 hours labor for engine and trans mounts combined.

Estimated cost: $800-1,400

Typical onset: 60,000-100,000 mi

Symptoms: Coolant loss with no visible external leak, Sweet smell from engine bay, Low coolant warning light, Overheating in severe cases

Fix: BMW-sourced water pump (electric) and plastic thermostat housing develop leaks. Water pump is buried and requires front accessory removal. 6-9 hours labor for pump, 3-4 hours for thermostat. Do both together if one fails.

Estimated cost: $1,500-2,800

Typical onset: Not mileage-driven—can occur anytime, especially with tunes

Symptoms: Sudden loss of boost pressure, Loud pop or hiss from engine bay, Limp mode, Visible cracked or blown-off charge pipe

Fix: Factory plastic charge pipe between turbo and intercooler can crack or blow off connections under boost. Common on tuned cars or those seeing high ambient temps. Aftermarket aluminum replacement recommended. 1-2 hours labor.

Estimated cost: $400-800