Parts for your 2020 Mitsubishi Asx-Rack boots

2020 Mitsubishi ASX rack boots: what they do and when to swap them

Rack boots are absolutely fitted to the 2020 Mitsubishi ASX. Technical references that cover the ASX/RVR/Outlander Sport platform — including the Mitsubishi Motors Service Manual (Steering group: rack-and-pinion, with “rack boot” inspection/replacement procedures), the Mitsubishi ASA/EPC (listing “Boot, Steering Gear” and boot bands for MY2019–2021 ASX variants), and workshop data publishers such as Autodata/Haynes — all specify bellows-style steering rack boots on both sides of the rack. Even with electric power steering, the ASX still uses a rack-and-pinion that relies on protective boots.

On the ASX, the rack boots act like concertina dust covers that seal the inner tie rods and the rack bar from water, grit and road grime. Keep them happy, and the steering stays smooth, the inner tie rods last longer, and the rack’s internal seals aren’t chewed out by contamination. When a boot splits or its bands loosen, moisture and dirt creep in, which can fast-track wear, invite corrosion and eventually create play or knocking through the wheel.

They’re not a “replace by kilometres” item — they’re a “replace when perished or damaged” part. As a rule of thumb, a quick visual every service (10,000–15,000 km) is smart. If the ASX sees a lot of gravel or coastal driving, check more often. Look for cracks at the folds, oil dampness, loose clamps or tell-tale grease flung out on the inner rim or subframe.

• Replace the boots immediately if torn, swollen, hardened, or if clamps are missing.
• Use quality boot bands and ensure the breather equalises properly to avoid vacuum collapse.
• A wheel alignment is recommended after boot replacement because the tie-rod end is disturbed.
• If a boot has been open for a while, have the technician inspect the inner tie rod and rack for play — grit can accelerate wear quickly.

A typical replacement on the 2020 ASX involves removing the tie-rod end, sliding off the old boot and band, cleaning the area, and fitting a new boot with the correct orientation and clamps. Genuine or high-quality aftermarket boots sized for the ASX rack diameter are best. It’s a relatively low-cost save that protects a far more expensive steering rack — exactly the sort of preventative maintenance that pays off over Aussie and Kiwi roads.

• Does the 2020 ASX have rack boots with electric power steering?
  Yes. The ASX uses an electric-assisted rack-and-pinion, and it still needs bellows-style boots to keep dust and water off the inner tie rods and rack bar. EPS changes how assist is provided, not the need for protective rack boots.
• How often should rack boots be replaced on a 2020 ASX?
  There’s no fixed interval. Inspect them at every service and replace if they’re cracked, split, perished or the bands are loose. Many last well past 100,000 km, but harsh heat, gravel and road grime can shorten their life.
• Is it safe to drive with a torn rack boot?
  It’ll drive, but it’s not a great idea. A torn boot lets grit and water attack the inner tie rod and rack, which can lead to play, noise and expensive repairs. It can also affect roadworthy/WOF checks. Get it sorted promptly and have the wheel alignment checked afterward.