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Lincoln Aviator 1st Generation

2003–2005 · UN152 · suv

First-gen Aviator (UN152) — body-on-frame midsize SUV based on the third-gen Ford Explorer (U152) architecture. Single engine: 4.6L DOHC InTech V8 (302hp/300 lb-ft) — same engine family as the Mustang Mach 1's 4-valve Mod motor. 5-speed 5R55W automatic. RWD or 4WD. Built at St. Louis Assembly. Short three-year run; replaced indirectly by the MKX (2007) and revived as a unibody crossover in 2020.

Watch out: 4.6L DOHC InTech V8 doesn't share the 3V Triton spark-plug issue (this engine pre-dated the 3V design) but has its own cam-chain tensioner failures with a tell-tale cold-start rattle that can grenade if ignored — $2,000-3,500 repair. Rear air suspension is standard and leaks at the bag seams around 100k. Generally a rare, well-built truck overshadowed by sibling Explorer / Mountaineer market noise.

What your Aviator takes

The parts and fluids that fit this generation. Specs we publish are confirmed against two independent sources; the rest fill in as we verify them.

  • Wiper blades22" driver · 22" passenger · 16" rear✓ VerifiedView
  • BatteryGroup 65 · 650 CCA min✓ VerifiedView
  • Oil filterParts in catalogShop
  • Tire sizeNot catalogued yetFind yours soon
  • Engine oilNot catalogued yetFind yours soon
  • Engine air filterNot catalogued yetFind yours
  • Cabin air filterNot catalogued yetFind yours
  • Spark plugsNot catalogued yetFind yours soon
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  • CoolantNot catalogued yetFind yours soon
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  • Tire pressureNot catalogued yetFind yours soon
  • Key fob batteryNot catalogued yetFind yours soon
  • Power steering fluidNot catalogued yetFind yours soon
  • Differential fluidNot catalogued yetFind yours soon
  • Serpentine beltNot catalogued yetFind yours soon
  • Brake padsNot catalogued yetFind yours soon
  • Wheel fitmentNot catalogued yetFind yours soon
  • Brake rotorsNot catalogued yetFind yours soon
  • ThermostatNot catalogued yetFind yours soon
  • A/C refrigerantNot catalogued yetFind yours soon
  • Fuel filterNot catalogued yetFind yours soon

Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.

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