Parts for your 2013 Toyota Bb-Engine mount

2013 Toyota bB engine-mount — what it does and when to replace it

Technical sources confirm the 2013 Toyota bB uses engine mounts. Toyota’s Electronic Parts Catalogue for QNC20/QNC21/QNC25 models lists multiple “engine mounting insulators” and brackets, and the Toyota Repair Manual for the QNC20-series details removal/installation and torqueing procedures for the right-hand engine mount, left-hand (transaxle) mount, and front/rear torque mounts. Reputable aftermarket catalogues also list bB-specific mounts under typical Toyota part-series such as 12305-, 12371-, and 12372- prefixes. So, yes — engine mounts are fitted and are a normal service item on this vehicle.

On the 2013 Toyota bB, the engine mounts secure the engine and transaxle to the body while isolating vibration. They’re typically rubber or hydraulic-filled insulators that control movement when taking off, braking, or shifting, and they keep the driveline aligned so the exhaust, driveshafts, and shifter linkages aren’t stressed. Good mounts make the cabin feel smooth at idle and prevent that harsh thump when the throttle is opened or lifted.

There’s no fixed replacement interval, mounts are inspected at regular services and replaced on condition. Many last well past 120,000–200,000 kilometres, but heat, age, oil contamination, and rough roads can crack rubber or collapse a mount. Hydraulic mounts can also seep fluid when they fail.

• Common signs: excess vibration at idle (often worse with A/C on), clunks on take-off or gear changes, visible sagging or cracked rubber, and engine rocking under quick throttle blips.
• Related checks: torn exhaust flex joint, stretched shifter cable bushes, or split CV boots — all can be affected by excessive engine movement.

When replacing mounts on a bB, support the engine safely with a jack and a wood block under the sump lip, swap one mount at a time, and loosely fit all fasteners before torqueing to the workshop spec with the engine’s weight settled. Re-check torque after a short road test. It’s smart to replace a badly failed mount plus its opposing torque mount to keep movement balanced. Avoid prying on alloy brackets and don’t lift the engine by the sump alone. Genuine or quality aftermarket mounts matched to the exact QNC variant fit best and keep NVH to factory levels.

A quick visual each service for oil-soaked rubber, perished bushings, or shiny witness marks from excessive movement can save bigger bills later, and it’ll keep the little bB feeling tight and quiet around town.

How many engine mounts does a 2013 Toyota bB have?
Most QNC20/QNC21 bB models run three to four mounts: a right-hand engine mount, a left-hand transaxle mount, plus front and rear torque mounts. Exact count can vary slightly by engine/trans combo, but the setup is designed to control movement in all directions.

What are the tell-tale signs the bB’s engine mount is shot?
Shudder at idle, a thunk on take-off, or a noticeable rock from the engine when blipping the throttle are the big ones. Hydraulic mounts may leave a dark, oily stain if they’re leaking. If the exhaust flex keeps cracking, that’s another clue the mounts are letting the engine move too much.

Should engine mounts be changed as routine maintenance?
They’re not a time-based service item. Inspect them at every service and replace when cracked, collapsed, oil-soaked, leaking, or causing NVH issues. Many last well beyond 150,000 km if not contaminated by oil or coolant, but city stop-start driving and heat can shorten their life.