140 votes
Just replaced front rotors and pads with Bosch semi-metallics. After initial “bedding in”, including some sharp braking from speed and emergency stops from various speeds, I went on a long trip. Straight away, I noticed that whenever I start to apply the front brakes after a sustained period of acceleration, there is a single knock/pop sound that comes from around the front left of the vehicle.
I went with Bosch Quiet Cast rotors and pads a year ago. Extremely happy with them.
The rotors and pads I used were Bosch and I'd use them again.
I have used Bosch rotors that have zinc coating and they don't rust as bad as normal rotors.
I have seen the Blaster coils burn Bosch rotors down to a stump. I don't know if something might have been wrong with the system--timing, wrong plug, etc. But it happened.
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