Toyota RAV4: SXA10/SXA11 Chassis and Sill Rust

First-generation RAV4s are now 24–32 years old and rust is endemic in vehicles that spent any time in coastal or wet climates common in New Zealand. Primary rust zones are the sill sections behind the front and rear wheel arches, the floor pan beneath the carpet, the spare wheel well under the rear cargo area, and the chassis rails forward of the rear axle. NZ examples are at higher risk than dry-climate Australian vehicles. Severe sill or chassis rust can compromise structural integrity and will fail a WoF inspection.

• Bubbling or blistering paint along the lower sill and wheel arch edges
• Soft or spongy floor feel when pressing down on the carpet
• Visible surface rust or pitting on the chassis rails under the vehicle
• Damp or musty smell inside the cabin, especially in the rear footwells

1. 1

   Push firmly on the lower sill at multiple points — any flex or give indicates rust perforation.

2. 2

   Pull back the boot carpet to inspect the spare wheel well base.

3. 3

   Check the floor pan inside the cabin by lifting the carpet and underlay in the rear footwells.

4. 4

   Inspect all four wheel arch lips where the pressed metal meets the sill.

5. 5

   If a workshop inspection is possible: Lift the vehicle on a hoist or use a torch and mirror to inspect chassis rails, rear cross-member, and sills from underneath.

Parts involved: Body corrosion.

$800 to $5,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the vehicle always been garaged, and was it used in a coastal or high-rainfall area?”
• “Has any rust remediation or cavity wax injection been carried out?”
• “Has the vehicle recently passed a WoF, and were any rust-related advisories noted?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.