Subaru Impreza: Rust in JDM imports — rear arches, sills and underbody

Most Australian Imprezas of this era are ex-Japan imports, and cars from snowy prefectures spent winters on salted roads. Rust shows in the rear wheel arch lips, sill seams, around the fuel filler, boot floor seams and on suspension components underneath. Surface rust on subframes is common and manageable; bubbling arch lips and crusty sill seams mean expensive panel work and can become roadworthy issues. Border checks catch the worst, but plenty of borderline cars are on Australian roads.

• Bubbling paint on rear arch lips
• Crusty seams under the sills
• Heavy surface rust on subframes and suspension arms
• Rust stains weeping from panel seams

1. 1

   Run a finger inside each rear wheel arch lip feeling for bubbles.

2. 2

   Kneel and check the sill seams and jacking points.

3. 3

   Get the car on a hoist or use your phone torch/camera under the rear subframe, fuel tank straps and suspension arms.

4. 4

   Lift the boot carpet and check the spare wheel well seams.

5. 5

   Ask if it is a fresh import and check the import year on the vehicle's registration record.

Parts involved: Body corrosion.

≈A$460 to ≈A$2,760 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, 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.

• “What year was it imported from Japan?”
• “Has it had any rust repairs for compliance or roadworthy?”

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.