My original application: 89 Honda Accord sedan, 206k miles, (intended to convert to R134a). First, if you have a Keihin ac compressor in a Honda such as mine, you should seriously consider upgrading to this Denso, especially if you intend to convert from R12 to R134a. I did quite a bit of research and learned the Keihin compressor won't work well at all with R134a. Unfortunately, because my Honda would probably have needed a condenser upgrade and a cooling fan upgrade to get "close" to the cooling efficiency of R12, I did not go with the R134a conversion, and instead I stuck with R12 (I'm MVAC certified and still had some R12, so I chose to use it). Converting to the Denso from the Keihin requires the a different mounting bracket and hardware, the correct manifold for the Denso compressor, new hoses (which I upgraded to barrier hoses), a new expansion valve, and a new receiver/dryer). Properly flush, evacuate, then disassemble the system enough to add the proper oil (Ester for compatibility with r12 or r134a..my choice). Then reassemble, (make sure you have all new o-rings in place), then evacuate making sure to pull a close-to-perfect vacuum, and then charge properly with refrigerant (80% of the correct requirement if you are converting to R134a). As I mentioned, I kept the system R12.Bottom Line: The car blows ICE here in Arizona for the last 3 months with the hottest temperatures we get! Trust me, the combination of the this Denso compressor with my 89 Honda Accord sedan is BETTER THAN NEW. At least in my case, this rebuilt Denso was a super find. The price, and service were EXCELLENT!! I emailed and got proper technical advice very quickly. ABSOLUTELY a high recommendation!I can't attest to the longevity of the compressor, but Denso (Nippondenso) has been making compressors for a long time and my research says it's high quality. This rebuilt compressor has performed as good as new. Of course if you aren't converting from a different compressor, all the extra costs I incurred will be mostly avoided.