hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
115,000 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Lincoln Navigator engine problems

engine problem

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2003 Lincoln Navigator Owner Comments

problem #3

Nov 292015


  • 107,000 miles


Coming home from a trip engine started to misfire. Come to find out the # 3 spark plus exploded destroying the coil and and threads holding the spark plug in. Causing the need to re tap the threads.

- Port Haywood, VA, USA

problem #2

Jul 192012


  • 79,000 miles
Just driving in a 45 mph, when heard loud banging coming from engine. Pulled over and had car towed in for repair. Engine blew out a spark plug.

- Charlotte, NC, USA

problem #1

Nov 052014

Navigator 8-cyl

  • 159,000 miles
We were driving down the highway at approximately 70mph, when I heard a loud pop and clanking noise on the driver's side front engine area. I was driving with my whole family in the SUV. We were able to still drive it to a mechanic. The mechanic diagnosed it as a "blown-out spark plug". he said the spark plug had come out of the engine block. He said it is a common problem on that engine and there was a spark plug kit for it. He used the kit, and it only held for about 2 months. It now has lost power, shakes, and poor gas mileage. The repair kit obviously is not ample for this problem.

- Millville , UT, USA

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