Parts for your 2017 Mitsubishi Asx-Rack boots

2017 Mitsubishi ASX rack-boots: purpose, servicing and replacement

Technical sources confirm the 2017 Mitsubishi ASX (CF series) is fitted with rack-boots. The Mitsubishi ASX Workshop Manual (Group 37 – Steering, Electric Power Steering) details bellows-type steering rack boots with specific removal and installation procedures, and the Mitsubishi ASA/EPC for 2017 ASX/Outlander Sport lists steering gear boots and clamps for both sides. Major AU/NZ aftermarket catalogues (e.g., Repco, BNT, Febest, Gates/Mackay) supply rack-boot kits for 2010–2019 ASX models, further verifying fitment.

On the 2017 ASX, the rack-boots (also called steering rack bellows) are flexible rubber sleeves that seal the ends of the rack-and-pinion, where the inner tie-rods live. Their job is to keep dust, sand, water and road grime out while holding the correct grease around the inner joints. Even though this ASX uses electric power steering (EPS), the rack and inner tie-rods still need that protection. If a boot cracks or splits, grit and moisture get in, chewing out the inner joint and corroding the rack bar. You won’t see power-steering fluid leaks on an EPS rack, but you may notice grease weeping, a gritty feel through the wheel, or a light knock over bumps. Left alone, that small tear can turn into inner tie-rod or rack replacement, and a likely WOF/RWC fail.

As part of routine servicing, rack-boots should be inspected every visit. Look for fine cracks, splits, loose or missing clamps, bellows that are collapsed or full of debris, and any rusty staining on the exposed rack bar when the boot is gently compressed. Vehicles that see gravel, beach runs, farm tracks or lots of water crossings in Aus or NZ should be checked more often. If one boot has failed, it’s smart to assess both sides, since age and exposure are similar.

When replacement is needed, best practice is straightforward but precise:

• Remove the outer tie-rod end and count the turns or measure the exposed length to keep toe close to spec.
• Slide the old boot off, clean the rack bar carefully, and inspect the inner tie-rod for play.
• Pack the joint with the grease type specified by the workshop manual (avoid overfilling).
• Fit the new boot in the correct orientation, seat it fully in the grooves, and secure with proper ear or stainless clamps. Avoid generic cable ties unless the boot kit specifies them.
• Torque fasteners to spec, then book a wheel alignment to lock in correct toe.

Quality OEM-style boots fit best and last longer than universal options. If contamination or corrosion is found under a torn boot, plan on inner tie-rod replacement and, in severe cases, rack reconditioning or replacement.

How often should the rack-boots be replaced on a 2017 Mitsubishi ASX?

There’s no set interval, they’re a “inspect every service” item. Replace them when cracks, splits, grease weep, or loose clamps are found. If the ASX regularly sees gravel roads, beach driving or water crossings, check them more frequently.

What happens if you drive with a torn rack-boot on a 2017 ASX?

Dirt and water get into the inner tie-rod and across the rack bar, accelerating wear and corrosion. That can lead to knocks, notchy steering, alignment drift and uneven tyre wear, and it commonly triggers a WOF/RWC failure in NZ or Australia.

Can only one rack-boot be replaced, or should both be done on a 2017 ASX?

It’s acceptable to replace just the damaged boot, but if both are the same age and one has failed, doing both is sensible. Always finish with a wheel alignment to protect tyres and steering feel.