I purchased this based on the reviews and it appearing to be a decent value. However, slightly longer than the 1 year warranty and the device failed again. My previous original model lasted over 13 years, however this one failed a little of a year of occasional use. The process was as expected for replacing a brake booster. I am just super disappointed in the complete lack of quality in this unit. It makes me very LEERY to purchase any kind of automotive item from Amazon as a result. Horrible experience. You would be much better served going to the local junk yard and trying your luck there.