Parts for your 2006 Toyota Bb-Exhaust mount

2006 Toyota bB Exhaust Mount

Based on Toyota’s technical literature, exhaust mounts are absolutely relevant and fitted to the 2006 Toyota bB. The Toyota Electronic Parts Catalog (EPC) for the bB (QNC20/QNC21) lists “Insulator, Exhaust Pipe Support” and associated hangers, and the factory Repair Manual for the related Scion xB/NCP31 platform includes removal and installation steps for the exhaust pipe supports (rubber insulators). These sources confirm the bB uses rubber exhaust mounts to suspend the exhaust safely under the vehicle.

On a 2006 bB, the exhaust mounts are small but important rubber insulators that hold the muffler and pipes in place while isolating engine and road vibrations from the cabin. They also allow a bit of controlled movement so the exhaust can expand and contract with heat, preventing stress cracks and keeping clearances from the floorpan, suspension arms, and bumper trims.

As part of routine servicing, it’s worth giving the exhaust mounts a quick once-over. Look for perished, cracked, or stretched rubber, a droopy tailpipe, or any contact marks where the system has been tapping the body or crossmember. Knocks over bumps, a new rattle at idle, or a droney note on the motorway can all point to tired mounts.

Replacement is straightforward with the car safely supported. Let the exhaust cool, spray the old insulators with silicone spray, and lever them off the hanger pegs. Fit new quality rubber (or high-temp polyurethane) insulators with a dab of silicone to help them slip on. It’s a good idea to replace mounts in pairs and check the metal hanger rods for rust or bent alignment. After refitting, ensure there’s even clearance around the muffler and pipes and that nothing touches heat shields or the rear bumper. Avoid petroleum grease on the rubber, and don’t “preload” the system tight—some movement is by design.

For most bB owners, a visual check at every service and replacement roughly every 5–10 years (or sooner in coastal, high-heat, or gravel-road use) will keep the exhaust sitting sweet and rattle-free.

• Purpose: support the exhaust, cut vibration, allow heat expansion
• Signs it’s time: sagging muffler, knocks/rattles, cracked rubber
• Tips: use silicone spray, replace in pairs, confirm clearances

Popular questions about 2006 Toyota bB exhaust mounts

How often should exhaust mounts be replaced on a 2006 bB?
There’s no strict kilometre interval, it depends on heat, age, and road conditions. Many last 5–10 years. Inspect at each service and replace at the first signs of cracking, hardening, or if the exhaust sits off-centre or rattles.

Can firmer polyurethane mounts be used on a bB?
Yes, quality polyurethane mounts can reduce exhaust movement and are handy on lowered cars or rough roads. They can transmit a touch more vibration into the cabin, so choose wisely and ensure they’re the correct dimensions and heat-rated for the bB.

What noises point to worn exhaust mounts on a bB?
A dull thump over speed bumps, a metallic rattle at idle, or a buzz at certain revs often means a mount has softened or torn, letting the exhaust contact the body or sway bar. A quick inspection under the rear should confirm it.