2006 TOYOTA TUNDRA

Typical onset: 120,000-180,000 mi

Symptoms: Check engine light with P0410/P0418 codes (air injection system), Rattling noise from engine bay on cold starts, Sudden catastrophic engine failure with metal shavings in oil, Loss of power and severe knocking after ignored air pump codes

Fix: The air injection pump fails and breaks apart, sending metal debris through intake runners directly into cylinders. By the time owners notice, piston ring damage is done. Requires complete engine rebuild or replacement. Prevention is key: replace air pump at first sign of noise or codes (3-4 hours labor). Once internal damage occurs, expect 25-35 hours for engine rebuild or 15-20 hours for used engine swap.

Estimated cost: $4,500-8,500

Symptoms: Visible rust scaling on frame rails, especially rear crossmember, Perforation or holes visible through frame, Failed state inspections in rust-belt states, Flaking rust chunks accumulating under truck

Fix: Toyota issued a frame replacement program through 2016, but most 2006 models are now outside that window. Frame rust on these trucks is aggressive and structural. Inspection is critical before purchase. Frame replacement is 40-50 hours labor if you can source a frame; most vehicles are totaled at this point. Minor surface rust can be treated preventively.

Estimated cost: $8,000-12,000

Typical onset: 80,000-130,000 mi

Symptoms: Clunking noise over bumps from front end, Steering wander or loose feeling at highway speeds, Visible grease leaking from ball joint boot, Excessive play when prying on tire with bar

Fix: NHTSA recall addressed some units, but many fall outside VIN ranges. Ball joints wear prematurely and can separate catastrophically. Requires replacement of entire lower control arm (ball joint is not serviceable separately on most applications). 2-3 hours per side, always do both sides and alignment. This is a safety-critical item.

Estimated cost: $600-1,000

Typical onset: 100,000-160,000 mi

Symptoms: Transmission fluid leaking from cooler lines at radiator, Rust perforation on transmission pan, Low fluid level causing delayed engagement or slipping, Pink fluid spots in driveway

Fix: Transmission cooler lines corrode where they connect to radiator and at frame contact points. Pan rust is common on salt-exposed trucks. Cooler line replacement is 2-3 hours; pan replacement adds another 2 hours with fluid service. Catching this early prevents transmission damage from low fluid. Always replace pan gasket and filter during pan work.

Estimated cost: $400-900

Typical onset: 90,000-150,000 mi

Symptoms: Loud ticking noise from engine that increases with RPM, Exhaust leak smell in cabin with heat on, Visible soot streaks on manifold, Check engine light with O2 sensor codes

Fix: Manifolds crack between runners and studs break off in head. Requires manifold removal, often with drilling/extracting broken studs from aluminum heads (add 3-4 hours if studs are seized). Figure 6-8 hours per side for manifold replacement with stud extraction. Aftermarket manifolds available but OE quality varies.

Estimated cost: $800-1,500

Typical onset: 140,000-200,000 mi

Symptoms: No-start condition with cranking but no fuel pressure, Intermittent stalling especially when fuel level is low, Whining noise from fuel tank area, Hesitation or stumbling under acceleration

Fix: In-tank pump assembly fails. Access through bed removal (preferred, 1.5 hours) or cutting access panel in bed floor. Pump replacement itself is straightforward once bed is off. Total job is 3-4 hours with bed removal. Always replace fuel filter simultaneously (inline filter under frame).

Estimated cost: $600-1,000

Typical onset: 120,000-180,000 mi

Symptoms: Single click when turning key, no cranking, Grinding noise during start attempt, Intermittent no-start requiring multiple key cycles, Starter spins but doesn't engage flywheel

Fix: Starter contacts wear internally or bendix fails. Access is tight on 4.7L V8, requires removal from underneath. 2-3 hours labor. Test battery and cables first before condemning starter. Remanufactured starters have good service life.

Estimated cost: $400-700