Bosch

Bosch is a German automotive supplier whose catalogue runs from ignition systems to wiper blades. Its Aerotwin range replaced the old metal-framed wiper with a flat, frameless beam blade: a spring strip runs the full length of the rubber so pressure is spread evenly across the windscreen, and the low profile is less prone to lifting at highway speed or clogging with leaves and grit.

We stock Bosch Aerotwin wiper blades as front sets, where one pack holds both blades in the lengths the car needs (the A930S, for example, is a 600mm and 475mm pair), as single AP-series blades in 600mm and 475mm, and as rear blades in 300mm and 330mm. We also carry Bosch ignition coils. Because wiper fittings and lengths vary between models, use the vehicle selector to confirm the set with TecDoc fitment for your car before ordering.

What is a Bosch Aerotwin wiper blade?

Aerotwin is Bosch's flat or beam-style wiper blade. Instead of a metal frame with several pressure points, a spring strip runs inside the rubber for its full length, so the blade presses evenly against the curve of the windscreen. The low profile reduces wind lift at speed and there is no frame to clog with leaves or grit. The result is a quieter, more even wipe.

Which Bosch Aerotwin size do I need?

Measure your existing blades from tip to tip, or read the length printed on them; the driver's side is usually longer than the passenger's. Each Bosch set covers a specific pair of lengths, so the A826S is a 600mm and 600mm pair while the A930S and A205S are 600mm and 475mm pairs. Lengths alone do not guarantee the fitting matches, so use the vehicle selector on our wiper blade category to confirm the exact set for your car.

What is the difference between a Bosch A-series set and an AP single blade?

An A-series set contains both front blades in one pack, which is the normal way to replace wipers because both sides age at the same rate. AP-series blades such as the AP24U (600mm) and the AP19U or AP475U (475mm) are sold individually, which suits a car that has damaged one blade or needs a length combination not offered as a set. Rear blades such as the AM30H, H301 and A334H are sold singly.

How often should wiper blades be replaced in Australia?

There is no fixed interval. Australian sun and heat harden and crack wiper rubber faster than a cooler climate would, so judge by performance rather than the calendar. Replace the blades when they streak, chatter across the glass, skip sections or leave a haze that clears slowly. Cleaning the rubber with a damp cloth buys a little time, but once the edge has hardened no amount of cleaning restores a clean wipe. Replace both front blades together.

When should an ignition coil be replaced?

An ignition coil steps the battery's 12 volts up to the high voltage the spark plug needs. When one weakens or fails the engine misfires, idles roughly, hesitates under load and usually logs a misfire fault code that turns on the check engine light. On engines with one coil per cylinder, the faulty coil can be replaced on its own. Use the vehicle selector to confirm the Bosch coil for your engine.