2009 Saab 9-3 1.9L Diesel · DG09 FJO

The most recent MOT on 23 July 2026 was a pass, but it carried three advisories – a minor exhaust leak in the engine bay, mild corrosion of both front and rear sub‑frames and a rear brake pipe showing surface corrosion and grease contamination. Earlier in the same week the vehicle failed for a rear nearside lamp, a faulty engine MIL indicator, and a fractured rear coil spring, while the 2025 and 2024 records show a pattern of recurring sub‑frame corrosion, brake‑pipe condition issues and tyre sidewall perishing. Overall the trend is moving from outright failures to passes with advisories, indicating that the most serious faults have been remedied, yet the underlying corrosion and wear problems remain unresolved and will need attention. At 87 819 miles on a 2009 model the average annual mileage works out to roughly 5 200 mi, well below the typical UK usage of 8‑12 000 mi per year. Such low utilisation often points to long periods of inactivity or very gentle driving, which can be as detrimental as high mileage because seals, bushings and rubber components age regardless of distance. The limited mileage reduces the likelihood of cumulative wear on engine internals and drivetrain gears, but it also raises the probability of corrosion on the chassis, brake lines and exhaust, as well as potential battery and fluid degradation from standing. When you inspect the car, give particular focus to the sub‑frame areas for any signs of rust penetration, especially around mounting points and the rear cross‑member; any creaking or clunking when applying torque to the steering or when passing bumps could indicate that the corrosion has progressed beyond the advisory stage. Examine the rear brake pipe and the off‑side rear brake hose ferrule for pitting, swelling or stiffening, and check that the brake pedal feels firm with no sponginess – a sign of compromised hydraulic lines. The fractured rear coil spring recorded in 2026 should have been replaced; verify that the rear suspension springs are intact, that the shock absorbers are not leaking, and listen for any metallic knock when the rear wheels are rocked. The exhaust system should be inspected for cracks or holes in the manifold and pipework, as a leak in the engine bay can raise cabin temperature and affect emissions. Finally, confirm that the nearside rear lamp now functions and that the MIL indicator illuminates correctly on the dash, as a dormant warning light can mask underlying engine faults. Given the vehicle’s age and low mileage, also check items that deteriorate with time. Inspect all four tyre sidewalls for cracking, dry rot or perishing, especially the front tyres which were flagged in 2024; any hardening or loss of tread uniformity may require replacement even if the tread depth appears adequate. Test the 12‑V battery voltage and look for corrosion on the terminals, as a battery left idle for years can lose capacity. Drain and replace the engine oil, coolant, brake fluid and power‑steering fluid if service stamps are missing, because fluids can absorb moisture and lose lubricity over time. Look over the suspension bushes, ball joints and engine mounts for any looseness or excessive play, and verify that the steering rack and tie‑rod ends operate smoothly without judder. A thorough visual and tactile inspection, combined with a careful road test for any unusual noises, vibrations or handling irregularities, will give you a clear picture of whether the remaining advisories are merely cosmetic or the precursors to more costly repairs.