How to Replace Your AP1 S2000's Alternator

What You'll Need

The alternator is located near the front of your engine. It works with your S2000'ss battery to generate power for your electrical components. Dim lights and flickering gauges are a sign of failing alternator. When the alternator completely fails, your car could start slowly or not start at all.

Required Tools

Step 1 - Remove Negative Battery Cable

First off, unhook the negative battery terminal to avoid any electrical safety issues. If you are still working with a factory radio unit then make sure you know the anti-theft codes for the radio. 

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Step 2 - Air Cleaner Assembly Clamps

The air cleaner assembly needs to be moved or straight up removed for this job. Go ahead and start loosening the clamps that hold the air cleaner assembly in place. Then disconnect the air hose, breather pipe, and cable from the air cleaner assembly. 

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Step 3 - Remove Air Cleaner Housing

Now undo all six of the latches that hold the air cleaner housing cover to the box and then remove the cover. 

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Step 4 - Move or Remove Air Cleaner Assembly

You should now be able to grab and twist the air cleaner assembly to put it to the side. Or, if you so choose, you can remove it completely from the bay. 

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Step 5 - Disconnect Air Control Solenoid

Now you are free to disconnect the air control solenoid valve connector from the air cleaner housing. 

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Step 6 - Remove Bolts and Clamps

There are three bolts pointed out as B on the slide above and two clamp points marked as C. Undo the three bolts and detach the hose at the clamp points. Afterwards, you can remove the bottom tray of the air cleaner housing which will allow you to finally access the alternator. 

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Step 7 - Loosen the Tensioner

See that tensioner on the picture? Get some slack on the belt by loosening the tensioner and then moving it down. 

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Step 8 - Remove Tensioner from Alternator

With the necessary slack on the belt go ahead and loop it off of the alternator. 

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Step 9 - Remove Alternator Connector and Cable

Look to the back of the alternator and disconnect the 4P connector and the positive alternator cable. In order to remove the positive alternator cable first remove the boot on the cable and then undo the 8mm nut underneath, attaching the cable to the alternator. 

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Step 10 - Continue removing Alternator Connectors

Here is another view of the connectors but with the alternator out of the way to give you a better look. 

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Step 11 - Remove Alternator Mounting Bolts

Finally, remove the alternator mounting bolts which will need a 10mm wrench. If this is the first time your alternator is being worked on then you'll probably need a breaker bar or a torque wrench to get the job done. 

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Step 12 - Remove Alternator

You are now free to remove the alternator after working the unit back and forth in a gentle sawing motion to free it from the mounting bracket. 

Now install your new alternator and just do the reverse of the removal to get everything back together again. 

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