2000 — 2001
2.5L I6 (M52TU)
Petrol
Check rear subframe mounting points | Note: E46s are notorious for chassis cracks near the rear axle; look for tearing in the boot floor metal (critical NZ WOF failure).
Inspect expansion tank and cooling hoses | Note: The plastic cooling system is a 'ticking time bomb'; if it hasn't been refreshed in 80k km, it will burst and overheat the head.
Listen for VANOS rattle at idle | Note: Sounds like 'marbles in a can'; indicates failing seals which causes poor low-end torque and fuel economy.
Check for oil leaks at the rocker cover | Note: Gaskets harden and drip oil onto the exhaust; look for smoke or a burning oil smell inside the cabin.
Complete cooling system overhaul (Radiator, Tank, Pump, Thermostat) is mandatory.
Inspect front control arm bushings (FCABs) and rear trailing arm bushes (RTABs) for steering precision.
Inspect CCV (Crankcase Ventilation) hoses for brittleness to prevent vacuum leaks and rough idle.
Replace the plastic water pump with a metal-impeller version.
Flush transmission fluid every 80k km to protect the aging ZF/GM gearbox.
Verify if the DISA valve flap is secure to prevent engine ingestion.
Check for power steering hose leaks, very common on high-mileage E46s.
Inspect window regulators; they fail frequently on this generation.
Estimated repair costs if issues arise
Non-negotiable preventative maintenance to avoid a warped cylinder head.
Expensive structural work if cracks are found; check carefully before purchase.
Restores the classic E46 handling; use Meyle HD or Polyurethane for longevity.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer