2011 INFINITI M37

Typical onset: 80,000-140,000 mi

Symptoms: Metal shavings in oil, glitter visible on dipstick, Sudden loss of oil pressure with dash warning, Rattling or knocking from engine block, especially cold start, Catastrophic bearing failure leading to complete seizure

Fix: VQ37VHR engines suffer from oil gallery gasket failures and timing chain guide wear that starve rod/main bearings. Once bearings are damaged, you're looking at short block replacement or full rebuild. Expect 18-25 hours labor for short block swap, plus machine work if rebuilding. Many owners opt for used engine replacement due to cost.

Estimated cost: $6,500-12,000

Typical onset: 70,000-110,000 mi

Symptoms: Strawberry milkshake appearance in coolant overflow, Transmission slipping or delayed engagement after cooler fails, White smoke from exhaust if coolant enters transmission, Overheating transmission and engine simultaneously

Fix: The integrated transmission cooler inside the radiator fails, allowing coolant and ATF to mix. This destroys the transmission rapidly. Fix requires radiator replacement (2.5 hrs), full cooling system flush, transmission flush or replacement if contamination occurred. If caught early (just cooler), 3-4 hours total. If transmission is damaged, add 8-12 hours for rebuild/replacement.

Estimated cost: $800-1,200 (cooler only), $4,500-7,500 (with transmission damage)

Typical onset: 60,000-100,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration felt through cabin at idle in gear, Visible engine/trans movement when revving in park, Excessive drivetrain movement during acceleration

Fix: The hydraulic transmission mount deteriorates, causing harsh shift feel and drivetrain slop. Replacement requires supporting engine/trans and is somewhat labor-intensive on this platform. Typically 2.5-3.5 hours for mount replacement.

Estimated cost: $450-750

Symptoms: Hard starting, especially after sitting overnight, Loss of power under acceleration, hesitation, Check engine light with fuel trim codes (P0171/P0174), Rough idle or stalling at stops

Fix: The in-tank fuel filter/pump assembly can become contaminated or the filter media degrades. Unlike older models with serviceable filters, this requires fuel pump module replacement. Tank must be dropped (2-3 hours labor). Sometimes injectors also need cleaning/replacement if contamination spread.

Estimated cost: $650-1,100

Typical onset: 80,000-130,000 mi

Symptoms: Harsh downshifts or flare-ups between gears, Transmission hunting/searching for correct gear, Delayed engagement when cold, Check engine light with transmission solenoid codes

Fix: The 7-speed auto (JATCO JR711E) develops valve body wear and solenoid issues. Repair involves transmission pan removal, valve body R&R, solenoid replacement, and adaptive value reset. Labor is 4-6 hours. Full transmission drop may be needed depending on specific solenoid location.

Estimated cost: $1,200-2,200