Parts for your 2020 Lexus Is-Exhaust mount

2020 Lexus IS exhaust-mount: what it does, how it wears, and when to replace it

Yes, the 2020 Lexus IS is fitted with exhaust-mounts (also called exhaust hangers or insulators). This is confirmed by Lexus technical documentation: the Lexus IS (XE30 series) Repair Manual includes procedures for removing and installing the exhaust pipe with reference to the mounting insulators and support brackets, and the Toyota/Lexus Electronic Parts Catalogue lists “Insulator, Exhaust Pipe” and “Bracket, Exhaust Pipe Support” for 2020 IS variants (GSE3#/AVE3#). These sources make it clear the exhaust-mount is both relevant and used on this model.

On the 2020 Lexus IS, the exhaust-mount’s job is to hold the exhaust system in place while isolating vibration. The rubber insulators let the pipework move a touch as it heats and cools, so it doesn’t knock on the body or stress the joints. They also keep the tailpipes sitting neatly in the rear bumper while the car copes with bumps, torque reactions, and thermal expansion.

During routine servicing, it’s smart to have the exhaust-mounts checked once the system has cooled. A quick look and flex test can spot perished, cracked, glazed, or overly soft rubber. Any hanger that’s torn, egg-shaped at the holes, or letting the exhaust sit off-centre is due for replacement. Brackets and welded pegs should be checked for corrosion or bending, too.

There’s no strict time or kilometre interval, but many owners end up replacing mounts somewhere around 100,000–150,000 km, earlier if the vehicle sees lots of short trips, heat, or rough roads. If one mount has failed, replacing the neighbouring mounts at the same time is a good shout so the system stays evenly supported. Use genuine Lexus insulators or high-temp aftermarket equivalents, and install them in the correct orientation (some have “UP” marks). A dab of silicone spray helps them slide on, avoid petroleum-based lubes that can attack the rubber.

Typical signs it’s time to sort the exhaust-mounts include:

• New droning, buzzing, or a rattle/knock over bumps
• Tailpipe sitting low or skewed in the bumper opening
• Exhaust tapping a heat shield or chassis on start-up or shutdown

After fitting new mounts, check clearances all along the system, make sure heat shields aren’t touching, and recheck for leaks at flanges that might have shifted during the job. Simple tools like exhaust-hanger pliers make the swap quicker, but the key is letting the system cool fully and supporting it safely while you work.

Popular questions about 2020 Lexus IS exhaust-mount

How many exhaust-mounts does a 2020 Lexus IS have?
The exact count varies by engine and market, but there are multiple mounts spaced from the front pipe to the rear mufflers to support weight and control movement. A quick look underneath or checking the Lexus EPC by VIN will show the locations on a specific car.

What does it cost to replace the exhaust-mounts?
In Australia and New Zealand, genuine insulators are often in the $20–$60 AUD/NZD range each, with labour typically 0.5–1.0 hours depending on access and how many are swapped. All up, expect roughly $120–$300 for a small set, more if several mounts or brackets need attention.

Can worn exhaust-mounts cause vibration or scraping?
They can. As the rubber softens or tears, the exhaust can sag or shift, leading to droning, knocks over bumps, or the pipe touching a heat shield or underbody. Replacing the tired mounts usually restores the correct height and clears the noises.