Parts for your 2016 Toyota Bb-Exhaust mount

2016 Toyota bB Exhaust Mount: Purpose, Care and When to Replace

Yes, an exhaust mount is used on the 2016 Toyota bB. Technical documentation confirms it: the Toyota bB (QNC20 series) Repair Manual’s Exhaust Pipe section details the exhaust mounting points and insulators, and the Toyota Electronic Parts Catalog lists multiple “insulator, exhaust pipe” rubbers for the rear muffler and mid-pipe. These sources make it clear the bB relies on rubber exhaust mounts (hangers) to support and isolate the exhaust system.

On this bB, the exhaust mounts are small but vital rubber insulators that suspend the exhaust under the car. They soak up vibration, keep the muffler and pipes sitting at the right height, and allow a bit of movement as the engine rocks and the system heats and cools. Good mounts help prevent droning in the cabin, protect oxygen sensor wiring, and stop the pipework from smacking the subframe, axle, or bumper over bumps.

As part of routine servicing, it’s smart to give the exhaust mounts a look every 12 months or 20,000 km. The rubber lives right next to heat and road grime, so it can harden, crack, or stretch. If the tailpipe looks crooked, the muffler knocks on start-up, there’s a new buzz or rattle at certain revs, or you spot perished rubber or torn loops, the mounts are due.

Replacement is straightforward with the right approach. Use a rubber-safe lubricant (soapy water or silicone spray) to slip the hangers off the pegs, avoid petroleum-based sprays that can attack the rubber. Support the exhaust with a jack and block of wood before removing any brackets. Swapping mounts in pairs (left/right or along a section) keeps the system sitting true. Stick with quality EPDM rubber or an OEM-equivalent, overly stiff polyurethane can transmit more vibration into the cabin on a daily driver.

After fitting, check clearances around the rear beam, heat shields, and bumper cut-out. If you’ve changed the rear muffler or added a heavier system, consider fresh mounts with the correct length to maintain factory geometry. Re-torque any hanger bracket fasteners to the workshop manual’s spec and re-check after a couple of heat cycles. Done right, fresh mounts will restore that quiet, rattle-free ride the bB is known for.

• Inspect interval: 12 months/20,000 km
• Tell-tales: rattles, sagging tip, visible cracks/tears, excessive movement
• Tools: safety stands, silicone spray, exhaust-hanger pliers (handy), basic spanners

How often should the 2016 Toyota bB’s exhaust mounts be replaced?

There’s no fixed kilometre limit, but many bB owners find mounts last 5–8 years depending on climate and driving. Inspect them annually, replace at the first signs of perishing, tears, or sag. If you’re fitting a new muffler, it’s good practice to install fresh mounts at the same time.

What are the signs of a failing exhaust mount on a bB?

Listen and look for a dull knock on start-up or over bumps, increased cabin vibration or droning at certain revs, a tailpipe that’s no longer centred in the bumper cut-out, or visible cracks and stretched rubber in the hangers. Any contact marks on the exhaust or underbody also point to tired mounts.

Are polyurethane exhaust mounts a good upgrade for the bB?

Poly mounts can hold position well on modified or heavier exhausts, but they often transmit more vibration. For a daily-driven 2016 bB, quality rubber/EPDM mounts usually give the best balance of comfort and durability. If choosing poly, expect a firmer feel and check clearances carefully.