Parts for your 2003 Toyota Highlander-Cv boots

2003 Toyota Highlander (Kluger) CV boots: purpose, service and replacement

CV boots are absolutely relevant and fitted to the 2003 Toyota Highlander (Kluger). Technical sources including Toyota’s Factory Service Manual (Drivetrain/Axle – Front Drive Shaft and Rear Drive Shaft sections for AWD) and the Toyota Electronic Parts Catalogue for ACU20/MCU25 models list inner and outer CV joints and corresponding rubber boot kits for both front (FWD/AWD) and rear (AWD) halfshafts. General repair guides such as Haynes/Chilton for 1999–2006 Toyota/Lexus platforms also specify inspection and replacement of CV boots on this generation. That means every 2003 Highlander has front CV boots, and AWD variants have rear CV boots as well.

The CV boots on a 2003 Highlander do a simple but critical job: they seal high‑moly grease around each constant velocity joint and keep out water, grit, and road crud while the joint articulates through bumps and steering lock. When a boot cracks or splits, grease flings out, water sneaks in, and the joint can start clicking on turns or vibrating under load—left too long, it’ll chew the joint out and turn a small job into a whole driveshaft replacement.

Best practice in Aussie and Kiwi conditions is to inspect the boots at every service or about every 10,000–15,000 km. Look for fine radial cracks, soft spots from oil soak, loose clamps, or tell‑tale grease spray on the inner guard or subframe. UV, coastal salt, outback dust, and heat around the exhaust can all accelerate wear.

• Common signs of trouble: grease splatter near the wheel or crossmember, a rhythmic click on full lock, shudder on acceleration, or a damp, grimy boot surface.

If a boot is damaged but the joint’s still quiet, a boot kit (boot, clamps, fresh grease, and clip) is often the most economical repair. The joint is cleaned and repacked, then the new boot is banded with the proper crimp tool. If there’s any clicking or pitting inside the joint, it’s smarter to replace the whole shaft assembly.

1. Use the correct high‑moly CV grease supplied in the kit.
2. Fit clamps with a banding tool to achieve the right tension—no worm clamps.
3. Mind the ABS tone ring, keep it clean and grease‑free.
4. Torque the axle nut to spec and stake a new nut as required by Toyota’s procedure.

FWD Highlanders have two front boots per side (inner and outer). AWD adds two more per rear side, so a quick glance at all four corners during routine servicing pays off.

FAQs

How can someone quickly spot a torn CV boot on a 2003 Highlander/Kluger?
They can look behind the front wheels (and rear on AWD) for slung grease on the strut, guard liner, or subframe. A shiny, wet band around the boot, loose clamps, or fine cracking in the rubber are giveaways. Spinning the wheel by hand on a hoist helps spot splits that open under flex.

Is it safe to drive with a split CV boot?
If the split is fresh and the joint is still quiet, short local trips may be OK—but grit and water start damaging the joint immediately. It’s best to repair a torn boot promptly to avoid turning a simple boot job into a full shaft replacement.

Do AWD models have more CV boots to service?
Yes. AWD Highlanders (Kluger) have front and rear halfshafts, so there are four additional boots at the rear. Plan inspections accordingly, especially if the vehicle tows, sees beach work, or does gravel kilometres.