2005 — 2008
2.0L I4 (EW10J4S)
Petrol
Start the engine from a dead cold state and listen closely to the top end of the engine. Let it idle up to operating temperature and listen for persistent, rapid metallic tapping. | Note: The EW10J4S engine features hydraulic lifters that are highly sensitive to oil quality and viscosity. Neglected servicing or incorrect oil leads to sticky lifters, which cause loud tapping and can eventually lead to valve damage.
Activate the indicators left and right while turning the steering wheel fully lock-to-lock. Check if the indicators cancel correctly, and verify that the headlights/fog lights do not randomly flick off. | Note: The COM2000 steering column switch unit is a notorious failure point on the 307. Internal ribbon cables wear out, leading to self-cancelling indicators, airbag warning lights, or headlight glitches, which are immediate WOF failures in NZ.
Drive over a series of speed bumps or rough suburban roads at low speed (20-40 km/h). Listen for deep knocking or light metallic rattling from the front suspension. | Note: The front end of the 307 is heavy, putting significant stress on lower control arm rear bushes, anti-roll bar drop links, and strut top mounts. These wear out rapidly on rough New Zealand roads.
Accelerate hard in 3rd gear from 2,000 RPM up to the redline. Watch the rev counter to ensure engine speed rises proportionally with road speed, and check for notchiness or crunching when shifting quickly. | Note: The EW10J4S is a high-revving performance engine mated to a close-ratio 5-speed manual. Aggressive driving wears out the clutch and synchros (especially 2nd and 3rd gear) prematurely, making replacement highly likely on used examples.
Minor service including high-grade synthetic oil (5W-40 meeting PSA B71 2296) and filter change. Inspect cabin microfilter and clean the scuttle panel drain holes to prevent water ingress into the cabin electronics.
Intermediate service. Replace spark plugs (critical for the EW10J4S coil pack health), flush brake fluid, inspect front brake rotors for wear limits, and check front suspension bush integrity.
Major service milestone. Replace the timing belt, tensioners, idler pulleys, and the water pump. Flush the engine coolant, replace manual gearbox oil, and inspect the engine mounts which soften over time.
Always use premium 95 or 98 octane fuel; the high-compression EW10J4S engine runs poorly and can suffer from pre-ignition/pinging on 91 octane.
Inspect the plastic rocker/valve covers regularly for oil leaks, as heat cycles warp these covers, letting oil drip onto hot exhaust components.
Keep the windscreen cowl drain paths completely clear of pine needles and debris to prevent water from flooding the BSI (body control module).
Monitor the engine coolant level and thermostat housing; the plastic housing is prone to hairline cracks and slow, hard-to-detect leaks.
Perform a throttle body clean every 30,000 km to prevent erratic idling, engine stalling, or 'Anti-Pollution Fault' warnings on the multi-function display.
Estimated repair costs if issues arise
Non-negotiable preventative maintenance required every 4 years or 80,000-100,000 km. Failure means bent valves and a write-off for the engine.
Sourced as a complete steering column assembly. Requires delicate steering wheel and airbag removal, plus diagnostic configuration to match the vehicle's multiplex system.
Labor-intensive job requiring subframe drop. It is highly recommended to replace the crankshaft rear main oil seal while the gearbox is removed.
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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