Parts for your 1999 Toyota Avensis-Exhaust mount

1999 Toyota Avensis Exhaust Mount — What it does and when to replace it

Exhaust mounts are absolutely used on the 1999 Toyota Avensis (T22). Toyota’s Electronic Parts Catalogue for the T22 (1997–2003) lists multiple “Insulator, Exhaust Pipe Support” pieces along the system, and the Toyota repair manual exhaust section, plus the Haynes Toyota Avensis Petrol & Diesel (Feb 1998–May 2003) guide, all describe rubber exhaust hangers as standard fitment. Aftermarket catalogues from Bosal and Walker also include Avensis-specific rubber mounting insulators and fitting kits.

On this Avensis, the exhaust mounts (rubber hangers/insulators) suspend the exhaust from the body and crossmembers, isolating vibration and keeping the pipe and silencers aligned. They stop the system knocking on the subframe, floor, heat shields or bumper, and they help the flex joint and welds live a long life by absorbing movement.

Over time, heat, road grime and coastal air harden or crack the rubber. When the rubbers sag or split, the exhaust hangs low, rattles on bumps, or thumps at idle. Left too long, a dropped tailpipe can stress the flex section or even damage the catalytic converter.

Good practice on a 1999 Avensis is to inspect the mounts at each service or at least every 10,000–15,000 km. Look for perishing, splits, elongation of the holes, or shiny contact marks where the exhaust’s been touching the body. If one rubber has failed, the others are usually not far behind, so replacing them as a set is often the go.

• Quick DIY tips: support the exhaust with a jack and a bit of timber, swap hangers one at a time, use silicone spray to slip the rubbers on and off, avoid petroleum grease on rubber.
• Check clearances after fitting — around the rear beam, heat shields and bumper — and make sure the system sits neutral (not pulling hard on any mount).
• In harsh climates or high-km cars, consider quality OEM-spec rubbers, overly soft aftermarket pieces can sag early, while very hard ones can transmit vibration.

Toyota refers to these pieces as “insulators” or “exhaust pipe supports.” Exact count and shape vary by engine and body style, but most ’99 Avensis models will have several along the mid-pipe and rear silencer. Using the VIN with a parts counter is the easiest way to match the correct rubbers.

FAQs

How many exhaust mounts does a 1999 Toyota Avensis have?
Most T22 Avensis models run about four to five rubber mounts, depending on engine and whether it’s a sedan, liftback or wagon. There’s typically one near the front pipe/mid-pipe junction, one or two around the centre section, and one to two at the rear silencer.

Can you drive with a broken exhaust mount?
It’ll usually still drive, but it’s not a great idea. A missing or torn mount can let the system sag or swing, causing knocks, heatshield rattles, or stress on the flex joint and catalytic converter. Replace the failed rubber promptly to protect the rest of the exhaust and keep noise down.

How often should the mounts be replaced?
There’s no fixed interval, but many owners end up swapping them somewhere between 80,000–150,000 km, sooner in coastal areas. If there’s sag, splits, or banging over bumps, that’s the sign to change them — ideally as a small set.