Parts for your 2006 Lexus Is-Exhaust mount

2006 Lexus IS exhaust mounts: purpose, care, and when to replace

The 2006 Lexus IS (XE20 series – IS250/IS350) absolutely uses exhaust mounts. In Toyota/Lexus terminology they’re “exhaust pipe support insulators” (rubber hangers). This is documented in the Lexus/Toyota factory repair manual (TIS) under Exhaust Pipe – Removal/Installation, which shows the exhaust supported by insulators and brackets, and in the Lexus Electronic Parts Catalogue (EPC), which lists multiple exhaust support insulators for the IS of this model year. So yes—an exhaust mount is relevant and fitted to the 2006 IS.

These rubber mounts suspend the exhaust from the chassis, keeping the cat-back and mufflers centred while isolating vibration and noise. They stop the system banging on the body over bumps, maintain correct tip alignment in the bumper, and reduce stress on gaskets and flanges. When the insulators harden, crack, or stretch with age, the exhaust can droop, rattle, or load up other components, which can lead to leaks or broken brackets.

There’s no fixed replacement interval, but on a 2006 vehicle the originals are often tired. Best practice is to inspect them at each service or every 20,000 km—especially if the car does short trips, tows, or runs an aftermarket exhaust that’s a tad heavier.

• Tell-tale signs: thuds or knocks over speed humps, a visibly sagging muffler, exhaust tips sitting off-centre, perished or cracked rubber, or a buzzing rattle at idle that quietens when the system is lifted by hand.
• Quick check: with the car safely raised, lever the exhaust up and sideways—excessive movement or shiny contact marks on heat shields hint at tired mounts.

Replacing the mounts is straightforward with basic tools. Support the exhaust so there’s no strain on flanges, then remove the insulators from their pegs. A spritz of silicone spray helps them slide off and on—skip petroleum grease as it can attack rubber. It’s smart to replace them in pairs along a section so the system sits even. Refit any brackets and torque fasteners to the Lexus spec from the repair manual, then confirm clearances around heat shields, underbody, and bumper. After a heat cycle, recheck that the tips haven’t shifted and that there’s no fresh rattle. Quality OEM-style rubber insulators are quiet and durable, stiffer aftermarket options exist if the car has a performance exhaust and needs extra support.

FAQs

How many exhaust mounts does a 2006 Lexus IS have?
The exact count varies with engine and exhaust configuration, but typically there are several rubber insulators supporting the mid-pipe and rear mufflers. A quick look under the car will show the insulators at the rear muffler hangers and along the centre section on brackets. The Lexus EPC for the 2006 IS lists multiple insulators across the system.

Is it safe to drive with a broken exhaust mount?
It’ll often drive, but it’s not ideal. A failed insulator can let the exhaust contact the body, melt nearby trim, strain flanges, or damage oxygen sensor wiring. It can also increase cabin noise. Best move is to drive gently and get the mount replaced promptly.

What should be used to lubricate exhaust mounts during replacement?
Use silicone spray or a rubber-safe lubricant to slide the insulators on and off the pegs. Avoid petroleum-based greases, which can degrade rubber over time. A tiny dab of silicone paste makes future servicing easier too.