Parts for your 2012 Toyota Mark x-Universal joints

2012 Toyota Mark X Universal Joints (Uni Joints)

Technical sources including the Toyota Mark X GRX130-series repair manual (Propeller Shaft section), Toyota’s Electronic Parts Catalogue for GRX130/133/135, and typical Aisin A960E rear‑drive layouts confirm the 2012 Toyota Mark X is rear‑wheel drive with a two‑piece propeller shaft using universal joints at the front and rear, plus a centre support bearing. Universal joints are therefore fitted and fully relevant to servicing this model.

On the 2012 Mark X, the universal joints (often called “uni joints”) let the prop shaft transmit torque from the gearbox to the rear diff while accommodating suspension movement and small angle changes. That flexibility prevents binding, keeps the driveline smooth under load, and helps protect bearings and gears. The factory uni joints on this model are typically staked, sealed-for-life units without grease nipples, chosen for low maintenance and consistent balance on a refined RWD sedan.

Because they’re sealed, routine servicing focuses on inspection rather than lubrication. At each service interval, a workshop should check for free play in the joints, rust-coloured dust around the bearing cups, cracked seals, and any sign of binding. A road test for driveline vibration on light throttle, a chirp or squeak that rises with speed, or a clunk on take‑off or when shifting between Drive and Reverse can also flag wear. Catching issues early prevents collateral damage to the centre bearing, diff pinion, or transmission mount.

If replacement is needed, owners should know Toyota commonly supplies the Mark X propeller shaft as an assembly because the staked uni joints aren’t listed as separate service parts in the EPC. Specialist driveline shops can rebuild shafts with quality replacement joints and re-balance the assembly, which is a sound option when the rest of the shaft is in good nick. Correct phasing, alignment marks, and factory torque specs are critical, so the work is best done by a professional. After installation, confirming balance and testing for vibration at typical motorway speeds is wise, particularly for vehicles with modified ride heights or aftermarket wheels.

• Watch for: vibration under load between 60–100 km/h, clunks on take‑off, speed‑related squeaks, visible play at the yokes.
• Service tip: inspect uni joints and the centre support bearing at every oil service or WOF/roadworthy check, replace at the first sign of wear.

FAQs

Do the 2012 Mark X uni joints have grease nipples?
No. The factory uni joints are sealed, staked units with no grease points. Regular inspection is the go, if a joint wears, the prop shaft is usually replaced as an assembly or rebuilt by a driveline specialist who can restake/replace and balance it.

What are the common symptoms of a worn uni joint on a Mark X?
Tell‑tale signs include a chirp or squeak that matches road speed, a clunk when shifting between Drive and Reverse, and a shudder or vibration on light throttle around suburban to highway speeds. Any visible play or red dust at the bearing cups is also a giveaway.

How often should the Mark X uni joints be checked or replaced?
There’s no fixed replacement interval for the sealed uni joints. A quick inspection at each service or WOF/roadworthy is recommended, with replacement only when there’s play, noise, or roughness. Cars driven on corrugated roads or with altered ride height may need closer attention.