Parts for your 2006 Toyota Bb-Universal joints

2006 Toyota bB universal joints — what’s actually on the car

Looking to sort out universal joints on a 2006 Toyota bB? Here’s the straight talk. Based on Toyota technical literature for the bB QNC20/21/25 series (New Car Features and Electronic Parts Catalogue) and equivalent Scion xB service information, this model runs a front‑wheel drive layout with front drive shafts that use constant velocity (CV) joints at both ends. There’s no propeller shaft on this platform, which means no drivetrain universal joints (U‑joints) to maintain or replace.

Why’s that the case? U‑joints don’t transmit drive at a constant rotational speed when working at an angle, which can cause vibration in high‑angle applications. Front‑wheel drive cars like the bB need smooth, consistent power delivery while the front wheels steer and move through suspension travel, so they use CV joints instead. Toyota’s parts listings for the 2006 bB show inboard and outboard CV joints on each front axle, but no rear diff or tailshaft hardware where U‑joints would normally live.

One exception worth noting: the steering column’s intermediate shaft uses a small cross‑type joint (often called a steering U‑joint). That’s part of the steering assembly, not the driveline. It’s usually sealed and only needs attention if there’s play, rust binding, or a clunk when turning.

If someone’s hearing clicking on full lock or finding grease slung around the inside of a front wheel on a bB, that’s nearly always a CV joint or boot issue, not a failed U‑joint. Keeping the CV boots intact and properly clamped is the big ticket maintenance item here. Split boots let grease out and water in, and once the joint runs dry, it’ll start clicking and will eventually need replacement.

• For driveline concerns on a 2006 bB, inspect: CV boots (inner and outer), CV joint play, and axle seals.
• For steering feel or clunks, check: steering intermediate shaft universal joint for stiffness, corrosion, or free play.
• Service guidance from Toyota workshop manuals: replace damaged CV boots promptly, if the joint clicks, replace the axle assembly for best results.

FAQs

Does a 2006 Toyota bB have universal joints in the drivetrain?

No. The 2006 bB is front‑wheel drive and uses CV joints on the front axles. There’s no tailshaft or rear diff, so there are no drivetrain U‑joints. The only “universal joint” on the vehicle is in the steering intermediate shaft, which is separate from the driveline.

What should be serviced instead of universal joints on a 2006 bB?

Focus on the CV boots and joints. Look for split boots, flung grease, or clicking on turns. Replace torn boots early to save the joint, if it’s already clicking, a complete axle assembly swap is the reliable fix. While you’re there, check the steering intermediate shaft U‑joint for stiffness or play if the steering feels notchy.

What are the signs the steering universal joint is worn on a bB?

Tell‑tales include notchy or heavy steering around centre, a clunk through the column over bumps, or slight play when rocking the wheel with the engine off. If those pop up, have the intermediate shaft inspected and, if needed, replaced. It’s a straightforward job and restores tidy steering feel.