Land Rover Discovery Sport P300e L550

The ERAD is the electric motor integrated into the rear axle that provides AWD capability and EV-only driving. Documented cases show oil leakage causing complete failure, with replacement costs of approximately £8,300 (around €10,000) at a Land Rover dealer. One owner experienced two ERAD failures in 2.5 years, suggesting the replacement unit may be susceptible to the same failure mode. The ERAD is sensitive to water ingress and sensor faults. When it fails, the car loses electric drive entirely and runs as front-wheel drive only on the petrol engine. Out of warranty, this is one of the most expensive single repairs on any PHEV in this segment.

This is one of the most widely reported P300e issues. The high-voltage coolant heater, which provides cabin heating in EV mode without running the petrol engine, fails and triggers the 'EV temporarily not available' warning. A 12-page forum thread on discosportforums documents dozens of affected owners. Turning off all climate control can temporarily restore EV mode, confirming the heater as the cause. Replacement typically resolves the issue, but some owners report needing the heater replaced multiple times. The part and labor cost around £800-2,000 (approximately €1,000-2,500) at a dealer.

JLR issued a recall affecting over 170,000 vehicles including the Discovery Sport P300e for DC-DC converter failure. The converter steps voltage down from the high-voltage system to charge the 12V battery that powers electronics, lights, and control modules. An internal fault in the boost control microchip causes the converter to stop working, triggering multiple dashboard warnings. If ignored, the vehicle loses exterior lighting and eventually drive power. As of mid-2025, JLR acknowledged the issue but the corrective repair action had not been finalized for all affected vehicles, which is unusual for a safety recall.

Multiple owners report the P300e failing to charge, with symptoms including the charger starting then cutting off after seconds, getting stuck on 'initializing', or not responding to scheduled charging. Root causes range from software glitches (fixable via dealer update) to hardware failures in the onboard charger module or charging port actuator. Some owners report that new batteries and BMS replacements did not resolve the issue, suggesting deeper electrical faults. A PHEV that cannot charge its battery operates as an inefficient, heavy petrol car, negating the ownership benefit.

Some owners have reported their P300e losing roughly 30% of electric range compared to when new. The 15 kWh battery is relatively small, so even moderate degradation significantly impacts usable EV range. Land Rover offers an 8-year / 160,000 km battery warranty with a 70% state-of-charge guarantee. Module replacement is possible but expensive if outside warranty. Frequent short trips where the battery is rarely fully cycled can accelerate degradation. If degradation stays above the 70% threshold, Land Rover may decline warranty claims even when range feels inadequate.

When the P300e runs predominantly in EV mode, the petrol engine starts intermittently but may not reach full operating temperature before switching off again. This allows unburned fuel to wash past the piston rings into the engine oil, diluting it. Diluted oil loses its protective properties, accelerating wear on bearings, cylinder walls, and the timing chain. Owners are advised to periodically run the engine until fully warm and to change oil more frequently than the official interval if driving mostly short electric trips. The cost reflects more frequent oil changes at shorter intervals than the standard schedule.

The Pivi Pro infotainment system is shared across the JLR range and is known for occasional freezing, black screens, and software crashes. Some owners report it happening after overnight charging. Memory management issues can cause the system to run out of resources on longer drives. A hard reset (holding the power button for 10 seconds) usually restores function temporarily. JLR releases over-the-air updates to address known bugs, but the underlying issue persists on some vehicles. In most cases this is an annoyance rather than a costly repair, though hardware module replacement (if needed) runs around €500.