Intermittent Rough Running At Low Speed

[Jerrettspass]

I have a 06 year RX400 with only 65000 miles. After eliminating fuel and spark problems, the local agent says its the cylinder head gasket. I've been quoted £3800 for the repair. Has anyone experience of this fault?

[Duncan Roberts]

I have a 06 year RX400 with only 65000 miles. After eliminating fuel and spark problems, the local agent says its the cylinder head gasket. I've been quoted £3800 for the repair. Has anyone experience of this fault?

No: I have a 58 with 68,000 which I have had from new and no hint of this whatever. 'Policy' support from Lexus assuming that you have owned it from new and had it serviced by a Lexus dealer might be worth a try if the diagnosis is accurate.

[teejaybee]

I posted a topic similar to this acouple of days ago, could you describe what you mean by rough running? Mine seems to almost rev intermintently although there was no increase in speed. Just wondered if we had the same problem. My 400 is an 07 with 55K

[Jerrettspass]

I'm the second owner although had it for more than 3 years with no problems. Although its been regularly serviced by a non-Lexus garage, Lexus are not prepared to offer any good will concessions even though problems with the cylinder head are very remote.

The symptoms are intermittent slight rough running at low speed - this disappears at speeds over 20 mph or so. The rpm doesn't increase but there's slight vibration and roughness.

[Jerrettspass]

The revs don't appear to increase when it happens - there's a slight vibration/rough running

[teejaybee]

As I still have my used Lexus warranty until late March I intend to get it checked out asap! Good luck with your problem

[Duncan Roberts]

I'm the second owner although had it for more than 3 years with no problems. Although its been regularly serviced by a non-Lexus garage, Lexus are not prepared to offer any good will concessions even though problems with the cylinder head are very remote.

The symptoms are intermittent slight rough running at low speed - this disappears at speeds over 20 mph or so. The rpm doesn't increase but there's slight vibration and roughness.

The use of a "non-Lexus garage" and the fact that it is a second hand car will have greatly contributed to that decision.