1991 Saab 900 2.0L Petrol · H224 JBJ

Marginal rear braking efficiency defines the current mechanical state of this vehicle, as evidenced by the pass on 2 May 2026 which included an advisory noting that rear service brake requirements were only just met. This indicates the braking system is operating at the lower limit of acceptable safety standards and requires adjustment or repair to ensure consistent stopping power. An average annual accumulation of approximately 2,831 miles over 35 years represents a low usage profile for a vehicle of this vintage. Such a low mileage rate often suggests the car has spent significant periods stationary or has been used sparingly, which can lead to the degradation of rubber components and seals despite the relatively low wear on the drivetrain and engine internals. Inspection should focus specifically on the rear braking assembly to determine why the efficiency was recorded as marginal. During a test drive, pay close attention to the brake pedal travel and feel for any sponginess or a lack of firm response. It is important to verify if the vehicle maintains a straight line under moderate braking or if there is any evidence of binding calipers or uneven pad wear. The advisory regarding the need for adjustment or repair to the braking system necessitates a physical check of the rear drums or discs and the associated hydraulic lines. A technician should verify the condition of the rear brake shoes or pads and ensure the self-adjusting mechanisms are functioning correctly. Monitoring for any unevenness in deceleration or an unusually high pedal height will help identify if the marginal result is due to mechanical wear or a hydraulic inefficiency.