2005 TOYOTA TUNDRA

Typical onset: 100,000-180,000 mi

Symptoms: Check engine light with P0418/P0419 codes (secondary air injection), Rattling noise from air pump on cold starts, Sudden catastrophic engine failure: metal fragments from failed pump enter cylinders through air injection ports, Engine knock, loss of compression, metal shavings in oil

Fix: If caught early (pump rattling, codes only): replace air pump assembly and check valves, 2-3 hours labor. If pump disintegrates and contaminates engine: complete engine rebuild or replacement required — pistons, rings, bearings, head gaskets, or short block swap — 25-40 hours labor depending on approach.

Estimated cost: $800-1,200 for early pump replacement; $6,000-12,000 for engine rebuild after pump failure sends debris into cylinders

Typical onset: 80,000-150,000 mi

Symptoms: Ticking or hissing noise from engine bay on cold start that quiets as engine warms, Exhaust leak smell in cabin with heat on, Visible cracks in cast iron manifolds, typically at center runners, Check engine light with lean codes (P0171/P0174) from unmetered air

Fix: Replace exhaust manifolds with upgraded aftermarket headers or OEM manifolds. V6 is 4-5 hours, V8 is 6-8 hours due to tight clearances and seized studs. Often requires drilling out broken manifold studs.

Estimated cost: $800-1,500 (V6); $1,200-2,200 (V8)

Typical onset: 90,000-140,000 mi

Symptoms: Clunking noise over bumps from front suspension, Wandering or loose steering feel, Excessive play when prying on lower control arm with wheel lifted, Uneven tire wear on inside edge

Fix: Lower ball joints are pressed into control arms. Replace ball joints or entire lower control arms (most techs prefer complete arms for labor efficiency). Subject to recalls but many trucks aged out of coverage. 2.5-3.5 hours per side.

Estimated cost: $400-700 per side for complete control arm replacement; $600-1,200 both sides

Typical onset: 120,000-180,000 mi

Symptoms: Transmission fluid spots under vehicle near radiator area, Low transmission fluid level on dipstick, Transmission slipping or delayed engagement if fluid level drops significantly, Visible corrosion or wetness on cooler lines at frame rails

Fix: Replace transmission cooler lines from transmission to radiator. Steel lines rust through where they contact frame or are exposed to road salt. Some techs replace with aftermarket braided stainless lines. 2-3 hours labor, includes fluid refill.

Estimated cost: $350-600

Symptoms: Visible surface rust progressing to scaling and flaking on frame rails, Perforation holes in C-channel frame sections, especially rear crossmember area, Failed state safety inspections in salt states, Cracking noises when flexing frame over uneven terrain

Fix: No practical repair for severe perforation — frame replacement is cost-prohibitive. Minor surface rust can be wire-brushed, treated, and coated. Toyota had frame replacement programs for Tacoma/Tundra rust issues but coverage has expired. Inspect thoroughly before purchase in northern climates.

Estimated cost: Not repairable economically; frame replacement $8,000-15,000+ (usually totals the truck)

Typical onset: 100,000-160,000 mi

Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration at idle in gear, Visible sagging or torn rubber on transmission crossmember mount

Fix: Replace transmission mount and crossmember bushings. Straightforward job, 1-1.5 hours labor. Often done alongside other driveline work.

Estimated cost: $200-350