Parts for your 2020 Mazda Bt-50-Cv joint

2020 Mazda BT-50 CV Joint

CV joints are fitted to 4x4 versions of the 2020 Mazda BT-50. Both the late-2020 TF (Isuzu-based) model and the earlier UP/UR (Ford-based) model use front drive shafts with inner and outer constant velocity joints on four-wheel-drive variants, as outlined in the Mazda BT-50 workshop manuals (Front Drive Shaft/CV Joint sections) and the equivalent Isuzu D‑Max 2020 service literature. On 4x2/Hi-Rider models there’s no driven front axle, so front CV joints aren’t used.

On a 4x4 BT-50, the CV joint’s job is simple but vital: it sends power to the front wheels smoothly while the suspension moves and the wheels steer. Outer Rzeppa-style joints handle steering angles, while inner tripod/DOJ joints take up plunge as the suspension works. Kept sealed with quality grease and tight boots, they’ll run quietly for ages, even with a bit of rough Kiwi backroad or Aussie track work thrown in.

Good servicing means eyeballing the front axle boots at every service interval (typically 10,000–15,000 km or 12 months, depending on the schedule). They should be pliable, not cracked, and bone-dry on the outside. Grease flung around the inner guard or lower arm, a split boot, clicking on lock under throttle, or a shudder on take-off are all classic BT-50 CV warnings. If a boot’s torn but the joint’s still quiet, a quality boot kit and fresh moly CV grease can save the day. If there’s clicking or grey, gritty grease, it’s time for a complete shaft assembly.

• Replace axle nuts and circlips when specified, torque them properly, then stake as required.
• Use proper ear-clamp pliers so boot clamps don’t loosen on corrugations.
• If the knuckle or ball joints were undone, get a wheel alignment check.
• After a bad boot failure, consider changing the front diff oil in case contamination got in.

Running a lift or lots of droop? Steeper CV angles stress boots and bearings. Keep droop in check, consider a diff drop if the lift is significant, and clean mud from the boots after river crossings or clay sessions.

For 4x2 BT-50s, CV-joint talk doesn’t apply up front. Those utes use universal joints on the rear prop shaft, and there’s no front axle to service.

Popular questions

Does every 2020 BT-50 have CV joints?
Only the 4x4 models do. Both the Ford-based UP/UR (sold through 2020) and the late-2020 TF (Isuzu-based) BT-50 4x4s use front axle shafts with CV joints. The 4x2/Hi-Rider versions don’t have driven front wheels, so no front CV joints are fitted.

How long do BT-50 CV joints and boots last?
With sealed boots and sensible driving, many see 100,000–200,000 km or more. Frequent off-road work, lifted suspension, or torn boots can shorten that. Regular inspections and prompt boot repairs noticeably extend their life.

Can a split boot be fixed without replacing the whole shaft?
Yes. If the joint’s still quiet and smooth, a quality boot kit, fresh grease and new clamps will usually sort it. If there’s clicking, pitting, or contaminated grease, a complete replacement shaft is the smarter, longer-term fix.