2007 Saab 9-5 1.9L Diesel · FD57 UDZ

The defining mechanical story of this 2007 SAAB 9-5 is a progressive accumulation of chassis and drivetrain wear that has escalated from clean pass results into a serious emissions failure and recurring component advisories. The most recent test on 6 November 2023 recorded both a pass and a fail on the same day, with the failure attributed to exhaust emissions exceeding the manufacturer's specified limit. That same test also flagged a severely deteriorated nearside front outer constant velocity boot and advisory notes for both rear tyres sitting close to the legal limit, worn front brake discs, and a nearside rear lower suspension arm pin or bush showing movement. Stepping back through the records, the trend is one of steady deterioration rather than recovery: the 2022 test recorded deteriorated CV boots on both front outer joints and worn upper rear suspension arm pins or bushes on both sides, the 2021 test flagged both front tyres worn close to the limit, and the 2020 test noted rear tyre feathering, pitted rear brake discs, and the first appearance of worn rear upper suspension components. Only the 2019 test was entirely free of advisories, and earlier entries from 2017 and 2018 already showed a developing oil leak and a deteriorating rear exhaust box. The pattern suggests a vehicle whose consumable and chassis components are all reaching the end of their effective service life roughly in unison. Against a 19-year vehicle age, the recorded 180,230 miles equates to an average of roughly 9,486 miles per year, which is broadly typical for a car of this vintage and points to consistent use rather than long periods of standing. There are no obvious mileage gaps between tests that would imply a dormant period, and the recorded odometer readings progress in a manner consistent with regular annual driving. Mechanically, this is a high-mileage petrol SAAB, and although the annual average is unremarkable, the absolute mileage figure places considerable cumulative demand on the engine, transmission, suspension, braking system, and exhaust components. The emissions failure recorded at the most recent test is consistent with catalyst degradation, lambda sensor wear, or ignition and air-fuel mixture issues that tend to present at this kind of accumulated mileage, and the recurring CV boot deterioration indicates that the driveshaft seals have been deteriorating progressively across multiple test cycles rather than being freshly damaged. For a prospective buyer, the priority inspection areas are clearly defined by this record. The emissions failure should prompt a cold-start check for any signs of rough idle, hesitation, or an illuminated engine management light, and a pre-purchase emissions diagnosis via OBD would be advisable to identify whether the catalyst or a sensor is the root cause. The constant velocity boots flagged in 2022 and 2023 should be inspected for fresh grease loss, splits, or clicking noises from the front driveshafts during full-lock low-speed manoeuvres, as perished boots will rapidly progress to joint failure if left. Both rear upper and lower suspension arm pins or bushes have appeared repeatedly across 2020, 2022, and 2023 on the nearside and offside, so a test drive over broken surfaces should focus on any clonking, knocking, or loose knocking from the rear axle, particularly over speed humps and transverse joins; a wheel off the ground to check for vertical and lateral play in the rear suspension links is also worthwhile given the multi-year pattern. The braking system warrants close attention as well, with front disc wear advisories in 2023 and pitted rear brake discs recorded in 2020, meaning the discs are now approaching or have reached the minimum thickness and may need replacement alongside pads. On test, any pedal judder under firm braking, vibration through the steering wheel, or a pulsing brake pedal would confirm disc runout or lipping, and the handbrake should be checked on an incline for any tendency to slip given the rear drum or caliper condition is not directly recorded. The 2018 advisory of an oil leak, though not deemed excessive at the time, should prompt a visual inspection of the engine underside and around the turbo and cam cover for fresh seepage, as oil leaks on a 9-5 of this age commonly originate from the cam cover gasket, turbo oil feed, or sump area. Finally, the rear exhaust box noted as being in poor condition in 2018 should be physically inspected for corrosion, blowing joints, and heat shield integrity, as a deteriorating rear box combined with the recent emissions failure suggests the entire exhaust system may be approaching end-of-life.