2021 TOYOTA SUPRA

Typical onset: 30,000-60,000 mi

Symptoms: Sweet coolant smell from engine bay, Small puddle under engine after parking, Low coolant warning on dash, Visible seepage at back of cylinder head

Fix: Plastic crossover pipe at rear of head develops hairline cracks. Requires removing intake manifold for access. 4-5 hours labor plus coolant flush. OEM BMW part required.

Estimated cost: $800-1,200

Typical onset: 20,000-50,000 mi

Symptoms: Sudden trans fluid leak pooling under vehicle, Transmission slipping or harsh shifts, Burning smell if fluid contacts exhaust, Check engine light with trans fault codes

Fix: ZF 8HP transmission cooler lines crack at crimp points or o-rings fail. Early 2020-2021 models especially vulnerable. Line replacement is 3-4 hours, but if trans ran low on fluid, internal damage may require rebuild (20-25 hours). Always check fluid level immediately if leak suspected.

Estimated cost: $600-1,000 for lines only; $5,500-8,000 if trans rebuild needed

Typical onset: 40,000-80,000 mi

Symptoms: Long crank or no-start condition, Rough idle and misfires under load, Reduced power and limp mode, Fuel pressure fault codes (P0087, P0088)

Fix: BMW's Bosch HPFP can fail internally, starving injectors. Pump is on intake side of engine, 3-4 hours labor. Critical: contaminated fuel accelerates failure—always use top-tier gas. Check for metal shavings in fuel system; if present, injectors may need replacement too.

Estimated cost: $1,200-1,800 pump only; $3,500-5,000 if injectors also damaged

Typical onset: 50,000-90,000 mi

Symptoms: Oil seepage at front of valve cover, Slight oil smell or smoke at startup, Rough idle when engine cold, Occasional check engine light for cam correlation

Fix: Variable valve timing solenoids develop external leaks at o-rings. Not urgent but gets messy. Each solenoid is 1.5-2 hours labor; front is easier, exhaust side harder due to heat shields. Replace both at once to save on teardown time. Use OEM seals only.

Estimated cost: $500-900 both sides

Typical onset: 60,000-100,000 mi

Symptoms: Rough idle especially when cold, Hesitation or stumble during acceleration, Reduced fuel economy, Misfires under light throttle

Fix: Direct injection engines = no fuel wash on intake valves. Carbon accumulates over time. Requires walnut blasting or media cleaning of valves with intake manifold removed. 6-8 hours labor. Preventive: Italian tune-ups and occasional fuel system cleaner help but don't eliminate buildup.

Estimated cost: $800-1,400

Symptoms: No crank, no start despite charged battery, Clicking from engine bay when key turned, Dashboard lights normal but starter doesn't engage, Intermittent starting issues that become consistent

Fix: Subject to NHTSA recall—check VIN at Toyota dealer. Relay in starter circuit can fail, leaving you stranded. Dealer replacement is 1-2 hours, covered under recall. If out of recall window, aftermarket relay is cheap but labor is same.

Estimated cost: $0 if recall applies; $250-400 otherwise

Typical onset: 40,000-70,000 mi

Symptoms: Oily residue on rear diff cover or axle seals, Whining noise from rear during turns, Low diff fluid on dipstick or inspection, Clunking on acceleration if severely low

Fix: Cover gasket or axle seals weep on some units. Diff is BMW unit, same as Z4. Gasket replacement is 2 hours, axle seals are 4-5 hours each side. Use BMW LSD fluid only—wrong fluid kills limited-slip clutches. Check fluid level every oil change.

Estimated cost: $400-700 gasket; $800-1,200 per axle seal