ACDelco Gold 335-1207 (88878275) Alternator

A quality product that works great and was easy to install!

It worked and fixed all my random weird electrical problems. Very easy to install perfect fit for My Towncar 2008.Would highly recommend. Shipping was very very fast ordered at night was there in early morning.

Fit my 2008 Grand Marquis Perfect. The connector (covered by a red boot) that your cars power wire attaches to was bent during shipment. Luckily I just removed that part from my old alternator and switched it. Other than that I have no complaints. In my opinion this part/brand is superior to the local auto part store off brands, and it was much cheaper!

Was bad out of the box. Fan wasn't attached inside the alternator and rattled around. Returned for refund.

Works as it should, town car or other 4.6

I had an alternator fail on my 2006 Mercury Grand Marquis. The failure mode was that the voltage regulator was stopped regulating the voltage, so that I was getting some really crazy things happening like the Instrument Panel and Electronic Temperature Control going totally black. When I came to a stop, they would light up again. After getting home, I opened the hood and the battery was spitting out water from being overcharged. I hooked up my VOM up and read around 16.5 Volts, which is much higher than the expected 13 - 14 Volts. Using my FORSCAN software, I read that the Instrument Cluster had some protective circuitry that was causing it to shut down. There is one other diagnosis for these alternators. Disconnect the three wire pigtail that leads to it. Rev the engine to about 4,000 RPM for three seconds to simulate wide open throttle. The Ford alternator was designed to self-regulate at 13.5 volts until you shut the engine off. I was reading 16.5 volts. Initially I tried an AutoZone Alternator and it was acting up just like the one I replaced. You cannot buy a new Motorcraft Alternator. This Delco manufactured one seems to be OEM quality. It is very affordable and available with overnight delivery. Put it in my car and it fixed all the problems I was having. This is the part to get for these cars and trucks.

Happy with this purchase. I did not want to be cheap so I paid a little more and got this one.

Easy replacement at good cost. Repair shops want 260 for this part. I am not sure the longevity yet but I doubt it will break for a while. Good choice, plug n play nothing different needed.