2004 BMW 3 Series 2.0L Petrol · CF04 KLX

Recurring emissions failures represent the primary mechanical concern for this vehicle, specifically regarding exhaust gas composition and Lambda readings. The record shows two significant failures in early 2024 and early 2025, where carbon monoxide levels and Lambda readings fell outside specified limits, though both issues were resolved to achieve passing results by December 2025. While the most recent test on 17 December 2025 resulted in a pass with no defects, the intermittent nature of these combustion-related failures suggests a history of engine management or exhaust system instability that required rectification. The vehicle has covered 127,390 miles over its 22-year lifespan, which equates to an average annual usage of approximately 5,790 miles. This is a relatively low annual mileage for a vehicle of this age. Mechanically, such a profile often implies less wear on high-frequency components like tyres and brake pads, but it can also correlate with shorter journeys that may not allow the engine to reach optimal operating temperatures, potentially contributing to the exhaust emissions issues noted in the recent history. Prospective buyers should pay close attention to the engine's performance and any signs of fluid loss, given the advisory for an oil leak recorded in January 2023. During a test drive, it is essential to monitor for any changes in engine idle stability or hesitation under acceleration, which could indicate that the previous emissions failures have been fully addressed. Additionally, look for any signs of oil misting or weeping around the engine block or sump to ensure the previously noted leak has not progressed or recurred. Suspension integrity should also be a focal point, specifically regarding the nearside front shock absorber which was flagged for light oil misting in early 2023. While no subsequent advisories were issued for this component, you should listen for any knocking or clunking noises when driving over uneven surfaces or speed bumps, and check for any visible dampness on the shock absorber body. Any sudden pulling to one side or unevenness in steering response during the test drive could indicate that the suspension components require further attention.