<p>Practical engine guides: choosing engine assemblies, long blocks, cylinder heads and engine codes for Toyota, Hyundai, Audi and more. Written by TOSEN</p>
A 4x2 gearbox drives one rear axle via one propeller shaft; a 4x4 unit must connect a transfer case and carry a front output. Why the two differ and how to order the correct Hiace gearbox.
Compare a 1RZ rebuild and replacement as complete installed jobs. Use the identity, inspection, scope, supplier and handoff checklist before approving work or requesting a fitment-confirmed quote.
The VIN describes the vehicle's original configuration; the engine code or number identifies the unit installed now. Use this evidence-first checklist to resolve conflicts, verify interfaces and BOM, and prepare a supplier-ready replacement-engine request.
Short block, long block, or complete engine? Use this fitment-first framework to compare the exact BOM, total installed cost, test records, freight, warranty, and first-start duties before you buy.