Red-route stop-start on London Road and BMW brake wear
London Road through Norbury is a red route with bus stops, traffic lights and queues that build towards Thornton Heath Pond. BMWs that do much of their mileage along it spend a lot of time in first and second gear, and that shows in the clutch on manual cars and in the brakes on every car. It also shows in the auxiliary belt and tensioner, which work harder with the engine idling in traffic and ancillaries running. Cooling fans run for longer in queues as well, so we check the coolant level and condition while the car is in.
Brakes are the most common job we see from this sort of use. BMWs use a wear sensor on one wheel per axle, and it is designed to warn only near the end of the pad's life, so the discs are often worn too. We measure the discs as well as the pads and replace them together where they are below the minimum thickness, then fit a new sensor and reset the brake CBS item. If only the pads are needed, we say so. Brake fluid is tested too, because it absorbs moisture over time and BMW asks for it to be changed every two years whatever the mileage.
Automatic BMWs are common in heavy traffic, and they have their own points to watch. Many BMW automatics were described as having lifetime fluid, but fluid ages with heat and stop-start use. We will not push a gearbox service on every car, but if your BMW shifts roughly when warm or hesitates pulling away from the lights by Norbury Avenue, we will check fault memory and fluid condition and give you an honest view.
The drive down takes about 18 minutes: London Road to Thornton Heath Pond, Thornton Road to the Lombard roundabout and Mitcham Road across Mitcham Common, then Carshalton Road into Hackbridge. The quieter route via Pollards Hill is shorter but slower. Collection and delivery can be arranged if a weekday drop-off is awkward.