2023 — 2026
1.6L I4 PHEV (EP6FDT)
Plug-in Hybrid
Execute low-speed stop-and-go maneuvers to test the friction-to-regenerative braking transition. | Note: Peugeot PHEVs can suffer from grabby, inconsistent brake pedal feel at low speeds (under 15 km/h) as the system decides between regenerative braking and the physical pads.
Switch aggressively between EV, Hybrid, and Sport modes while accelerating up a steep NZ incline. | Note: Listen and feel for any harsh clunks or hesitation from the e-EAT8 gearbox when the 1.6L petrol engine fires up to assist the electric motor.
Navigate through all sub-menus on the central i-Connect Advanced infotainment screen and customize the 'i-Toggles'. | Note: The infotainment system is prone to lag, random reboots, or temporary loss of wireless Apple CarPlay/Android Auto connectivity, which often requires dealer-level software flashes.
Drive over coarse-chip seal roads at 80-100 km/h and listen for cabin resonance and tyre roar. | Note: Despite its premium positioning, the 408 uses a torsion-beam rear suspension which can transmit noticeable road noise and a busy ride quality over typical rough NZ rural highways when paired with larger 20-inch alloy wheels.
Perform the first major service including a software scan for the hybrid powertrain control module. Ensure the oil used meets the strict PSA B71 2010 (typically 0W-30) specification to mitigate low-speed pre-ignition (LSPI) risks in the direct-injection EP6 engine.
Replace the high-performance spark plugs (critical for preventing misfires under hybrid load transitions). Flush and replace the brake fluid, inspect the auxiliary 12V battery health, and clean the hybrid battery cooling fan ducting.
Conduct a comprehensive State of Health (SOH) test on the 12.4 kWh traction battery before the official 8-year/160,000 km warranty expires. Replace the accessory drive belt, inspect the timing chain for stretch, and flush the specialized dielectric coolant circuit used for the high-voltage battery.
Always use PSA B71 2010 / 0W-30 synthetic oil; incorrect oil weight or quality directly accelerates timing chain wear and valve carbon build-up in the EP6FDT engine.
Keep the 12V auxiliary battery under the bonnet trickle-charged or replaced early; a slightly weak 12V battery will trigger cascading, false 'Hybrid System Fault' warnings that disable EV mode.
Inspect and lubricate the motorized charging port door mechanism, especially ahead of damp, frosty NZ winter conditions to prevent latch failure.
Regularly use high-quality 95 or 98 octane fuel to minimize carbon deposit accumulation on the intake valves, which is a known vulnerability of direct-injected Prince engines.
Ensure the local Peugeot dealer checks for outstanding technical service bulletins (TSBs) regarding the On-Board Charger (OBC) firmware whenever the vehicle is serviced.
Estimated repair costs if issues arise
If the vehicle stops accepting AC charge, the internal 7.4kW OBC has likely failed. Out-of-warranty replacements require importing parts from Europe and specialized high-voltage labor.
Though highly revised in this generation, the Prince engine's timing chain can still stretch over time. Rattling on cold starts indicates immediate replacement is required to avoid catastrophic valve damage.
The hybrid system uses a dedicated, non-conductive coolant loop to keep the traction battery safe. This requires certified EV technicians, vacuum-filling equipment, and specialized fluid.
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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