Parts for your 2021 Mazda Cx-5-Rack boots

2021 Mazda CX-5 rack boots — what they do and when to replace them

Based on Mazda’s technical literature, rack boots are absolutely fitted to the 2021 Mazda CX-5. The CX-5 (KF series) uses an electric power steering (EPS) rack, and the Mazda Workshop Manual for the KF steering system shows bellows-style boots on both ends of the rack. The Mazda Electronic Parts Catalogue for the same model also lists the “boot, steering gear” (two required) along with the clamps and breather arrangement. So, rack boots are relevant and used on this vehicle.

On the 2021 CX-5, rack boots (also called steering rack bellows or gaiters) sit over the inner tie rods at each end of the steering rack. Their job is to keep out dust, water and road grit while holding in the correct grease around the inner joints. Because the CX-5 uses EPS, there’s no power steering fluid to worry about in the boots, but the protection they give the inner tie rods and the rack bar is just as critical. A split boot quickly lets in contaminant, which can chew out the inner joint or corrode the rack — not ideal on Aussie and Kiwi roads with plenty of rain, dust, and the odd gravel detour.

There’s no set replacement interval for rack boots on this model, they’re a “inspect at each service and replace if damaged” item. A quick look during regular servicing (every 10,000–15,000 km for most owners) is smart. If a boot is cracked, perished, loose on its clamp, or showing grease sling on the inside of the wheel, it’s time to replace it. When replacing, use quality boots and the correct style clamps, and make sure any breather or equalisation tube between boots is reconnected so pressure can balance from lock-to-lock. If the outer tie rod end has to come off for access, a wheel alignment afterwards is wise.

• Common signs a boot needs attention: visible splits, grease on the inner rim or control arm, dirt inside the boot, or a loose/missing clamp.
• Service tips: fit new clamps rather than reusing old ones, don’t twist the boot during install, keep the breather path clear, and torque tie-rod components to Mazda specs.
• Why act early: leaving a torn boot can fast-track inner tie-rod wear and may lead to a WOF/RWC fail — plus the repair bill climbs once the rack itself is affected.

Does the 2021 Mazda CX-5 have steering rack boots?

Yes. The KF-series CX-5 uses an EPS rack with a bellows boot on each side to protect the inner tie rods and rack from dust and water, as shown in Mazda’s workshop manual and parts catalogue.

How often should CX-5 rack boots be replaced?

They don’t have a fixed interval. Inspect them at every service (typically 10,000–15,000 km). Replace if torn, perished, loose, or contaminated. In harsh conditions (gravel roads, coastal air), closer checks are a good idea.

Is it safe to drive with a torn rack boot?

Short trips might be manageable, but it’s not recommended. Contaminants can quickly damage the inner joint and rack, and you risk a WOF/RWC fail. Book a replacement as soon as possible and get an alignment if tie-rod ends are disturbed.