NHTSA — Engine And Engine Cooling: Engine Problems


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
27,000 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.

2006 Lexus IS 350 engine problems

engine problem

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2006 Lexus IS 350 Owner Comments

problem #1

Feb 012010

IS 350 6-cyl

  • Automatic transmission
  • 27,000 miles


I experienced a problem that may be the same problem as the Lexus valve spring problem, or related to it. The mechanic said it was caused by a design flaw. Here is part of a letter I sent to Lexus in March 2010: I own a 2006 Lexus IS350, which I had been very happy with until February 1, 2010. As I was driving to work, there was a loud noise from the engine and the dashboard lit up with warning lights. I pulled over, read the owner"S manual, and drove to a Lexus dealership. The four year old car only had about 27,000 miles on it. Unfortunately, my warranty ended in December 2009. Since it was a Lexus, I wasn't expecting a major repair, but that"S what I got. The mechanic explained to me, that because of the engine design, it does not burn off carbon from the gasoline. The carbon collects in the engine, interferes with the valves and causes a misfire. I was told my 6 cylinder car only had 5 operational cylinders. The total cost to fix it was $995.20. I never received a response from Lexus. An apology would have been nice. The mechanic informed the consumer she will need to get the carbon cleaned out of the engine/fuel system on a regular basis, otherwise she would continue to experienced cylinder misfires. Updated IVOQ 12/01/10

- Lorton, VA, USA

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