Parts for your 2011 Toyota Bb-Exhaust mount

2011 Toyota bB exhaust mount — fitted from factory and worth keeping fresh

Exhaust mounts are absolutely used on the 2011 Toyota bB. Toyota’s Electronic Parts Catalogue for the QNC20/QNC21 series lists multiple “rubber, exhaust pipe support” pieces along the system, and the bB workshop/repair manual covers removing and refitting these supports during exhaust work. The Daihatsu/Toyota joint platform literature for the same model family also shows the same rubber hangers in the exhaust diagrams. So yes, the part is relevant and fitted from factory.

On the 2011 bB, the exhaust mounts (often called hangers) are the small but mighty rubber isolators that suspend the pipes and muffler from the underbody. Their job is to hold the system in the right spot, soak up vibration, and keep the exhaust clear of the body, heat shields, suspension and bumper. When they harden, crack, or stretch from heat and age, the exhaust can sag, tap on the floor, or sit crooked at the rear bar.

As part of regular servicing, it’s smart to have the exhaust mounts checked. Heat cycles, road grime and the odd oil mist can age the rubber. If the bB does short trips or lots of stop–start, mounts can go out earlier. Replacement is quick and inexpensive, and pays off in quieter running and fewer knocks over bumps.

• Tell-tale signs: rattles at idle, a dull thud on take-off or over speed humps, a wonky tailpipe, or visible perishing/splitting of the rubber.
• Service tip: inspect at each service interval, many owners swap them around 80–120,000 km, sooner in hot or coastal climates.
• Fitting notes: a dab of silicone spray helps the rubber slip on/off the hangers. Penetrating oil and a dedicated exhaust-hanger tool or flat-blade pry helps removal. Support the exhaust so sensors and joints aren’t strained.
• Parts choice: quality OEM-spec rubber suits daily use and keeps NVH low. Polyurethane options are firmer and durable, but can transmit a bit more vibration.
• After replacement: check clearances to the subframe, heat shields and bumper, then snug up any joints so the system sits neutral in the new mounts.

Technical references: Toyota Electronic Parts Catalogue (QNC20/QNC21 bB, Exhaust Pipe section) listing rubber exhaust pipe supports, Toyota bB QNC2# Repair/Workshop Manual procedures for exhaust removal/installation including hanger supports, Toyota Genuine Parts listings for exhaust pipe support rubbers used on the 2011 bB.

Popular question: How often should the 2011 bB’s exhaust mounts be replaced?

They don’t have a strict interval, but inspection at every service is wise. Many bB owners see 80–120,000 km from factory rubbers, with earlier swaps in hotter or coastal conditions. If there’s sagging, cracks, or knocks, replace them as a set in the affected area.

Popular question: What’s the easiest way to tell if a mount has failed on a bB?

Look and listen. A tailpipe that sits off-centre, a muffler that moves a lot by hand, or rubber hangers that are visibly split or shiny from stretching are giveaways. On the road, a dull thud over bumps or a buzz at idle that disappears when the exhaust is lifted slightly points to tired mounts.

Popular question: Should the 2011 bB use polyurethane or rubber exhaust mounts?

For a stock daily bB, OEM-style rubber keeps noise and harshness down and is perfectly durable. Polyurethane is tougher and holds shape well, handy for heavy loads or rough roads, but may pass a touch more vibration into the cabin. Choose based on comfort vs durability priorities.