What is the part number for the part that adjusts the aim of the headlights?

When trying to adjust the driverside headlight the screw spins freely and does not change the aim of the light itself(it works just fine on the passenger side.) I need the part number so I can order or buy the part to replace it. This is for my 2005 Jeep Grand Cherokee Laredo.
The part seems to have the screws inside a small black box that can twist in and out of the socket behind the headlights.

My car has 96800 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The OEM part number for the driver side (left) headlamp assembly that contains the adjusting mechanism is 55156351AK. The adjusting mechanism is not vended separately. The OEM assembly is about $300 and the aftermarket assembly (sold on Amazon for instance) is $100. You can also obtain an OEM used headlamp assembly by searching at Car-Part.com. Given the availability of a new aftermarket part at $100, I would not recommend spending more than $50 max on a used one and that would have to be in very good condition to make it worth it. If you want the headlight assembly replaced and adjusted by a certified Mechanic, dispatched by YourMechanic right to your location, please request headlight assembly replacement and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

At Diode Dynamics, we offer LED upgrades for your Grand Cherokee from bumper to bumper. LEDs are a great way to increase nighttime visibility and you can find our most popular LED bulb replacements for your switchback LED halos, backup bulbs, and rear turn signal bulbs for your Grand Cherokee below.
Open the bonnet and look at the back of the headlight casing, on most models there will be two adjustment screws/bolts on the rear or top of each headlight-locate them and grab the right tool in order to turn them (check the owner`s manual to be sure they`re the right ones).
The top of the brightest part of your headlight beam should be right at the center of your plus marking, or just below. If that is not the case, grab your torx screwdriver, locate your vertical adjustment screw, and adjust either clockwise or counter-clockwise, depending on the direction you need the beam to move.
As you stand in the front of the car, have the assistant turn the headlights off. Next, put the dark cloth or cardboard over one headlight, and have the assistant turn the headlights on. Find the adjusting screw and turn the screws slowly clockwise to raise the height of the lights or counterclockwise to lower them.
LED headlights are the future and owners of the Jeep Wrangler are lucky enough to have a set of direct fit LED headlights for their Wrangler! There are two different sets of LED headlights for you to choose from, with a pair of standard LED headlights or a pair of switchback LED headlights.
Look at the beam pattern, and if it`s a yellow color, it has a typical power uptime that tends to be a halogen bulb. If you turn on your headlights and it flashes for a second, then over time (about seven to 10 seconds peak performance and tends to be white in color), that tends to be HID.
All vehicles fitted with halogen headlight bulbs from the factory are suitable for LED conversion. The main advantage is a massive increase in road illumination and therefore improved safety when driving at night. The kit I used features CREE LED bulbs that have an output of 3,200 lumens.
Yes, and it`s a great idea since old-school headlights are just awful compared to their modern cousins. LED and halogen options are easy-to-install upgrades that often plug right in. These Bright Driver headlights are from Detroit Speed, but it looks like they no longer offer them.
To adjust the beam height of your car`s headlights, locate the adjustment screws or levers on the back of the headlight assembly. Once you have these, you will need to work on raising the beam of your car`s headlights. To raise the beam, turn the top adjustment screw or lever clockwise.
Screw the new adjuster into the headlight assembly.

Just slide the new screw into the slot on the headlight assembly. If you removed the plastic cap, put it in first. It has a hole in the center for the screw. Then, rotate the screw clockwise with a Phillips screwdriver to lock it in place.

Vehicles have an adjustment screw or bolt on the headlight assembly for adjusting headlight height, and some also have a screw for horizontal aim. Some vehicles also have a bubble level to help with adjustments.
Over time, the inert gas within the halogen bulb creates a discoloring film (brown or gray). This builds up on the inside of the bulb and dims the light output. Replacing the bulb is generally the only option here. Bad Alternator: Another very common reason to see dim headlights is a failing alternator.
How Do Your Headlights Become Misaligned. There are a few factors which could affect the alignment of your headlights. A common one is that when you drive over speed bumps, uneven surfaces and general potholes in the road, it can throw your headlight aim off. Small impacts or hits can also cause this issue.
Turn the lights off and use a screwdriver to turn the screws until the headlight is at the level you require. Turn your headlights back on to see if further adjustment is required. There should be a screw to adjust the lamp vertically and another screw to align it horizontally. Do each adjustment one at a time.
Open the hood of your Jeep Grand Cherokee. Lift the headlamp covers to expose the alignment screws on the headlamp. Use the Phillips screwdriver, Torx tool head, or Allen wrench to rotate the alignment screws. You should adjust the headlight beam to be approximately three feet above the ground.
Size. While LED headlights are typically more compact than HID headlights, you`ll need to purchase a conversion kit before installing either option if you`re switching from halogen bulbs.
Changing a halogen bulb is very easy. In order to save on your energy costs, you can replace a halogen bulb directly with an LED bulb. In addition, LED lights last on average around 25 times longer than a halogen bulb. There are various LED lamps that are suitable for replacing halogen lighting.
You can, but you`ll need to make sure they aren`t too bright for other drivers. There are some significant benefits to choosing LED bulbs — they last much longer than traditional bulbs and they use a lot less energy, so many drivers want to take advantage of those benefits.
LED bulbs are more energy-efficient than xenon bulbs and last up to 25 times longer. LED bulbs also produce a much brighter, whiter light than xenon bulbs, and they are much safer as they produce very little heat. LED bulbs are also more cost-effective in the long run, as they require less electricity to run.
A bulb running 55W will usually last about half as long as a bulb running 35W. Brightness: 35W bulbs driven by a true 35W ballast will provide at least 3200 lumens. This is over double the brightness of a factory halogen bulb, and plenty of light for night-time driving.
One reason xenon lights have gained in popularity is their extreme brightness. It`s often brighter than both an LED light and a standard headlight. These brighter headlights do come with a trade-off, though. They use much more energy than LED light.
HID and halogen lights are not interchangeable, as the lights require separate bulbs. Cars and vans that come equipped with high and low beam functions generally contain two pairs of headlight bulbs. However, headlights are available that can be switched between high and low functions.
The reality is that Xenon bulbs are really no more difficult to change than any other type of bulb. Many people believe this myth, and end up paying a small fortune to their dealer to do the job for them, but Xenon bulbs can be replaced in much the same way as a standard halogen bulb.
An LED light does not require a ballast because it uses a component called a “driver” to regulate the power going into the bulb.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

What is the part number for the part that adjusts the aim of the headlights?
ANSWER : The OEM part number for the driver side (left) headlamp assembly that contains the adjusting mechanism is 55156351AK. The adjusting mechanism is not vended separately. The OEM assembly is about $300 and the aftermarket assembly (sold on Amazon for instance) is $100. You can also obtain an OEM used headlamp assembly by searching at Car-Part.com. Given the availability of a new aftermarket part at $100, I would not recommend spending more than $50 max on a used one and that would have to be in very good condition to make it worth it. If you want the headlight assembly replaced and adjusted by a certified Mechanic, dispatched by YourMechanic right to your location, please request headlight assembly replacement and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

VVT oil control valve part number needed so I can replace the part.
ANSWER : Hi there. The part numbers that you have provided are for the left and the right. There is a difference in the two parts as they operate slightly different from each other. It is best to take the parts to your local parts store and have them cross reference the parts to get your replacement parts. You may even have to make a visit to a dealership or a OEM parts store. If you need further assistance with your variable valve timing solenoid replacement, then seek out a professional, such as one from Your Mechanic, to help you.

How do I adjust the aim of the headlights?
ANSWER : Your headlights can be adjusted to ensure that the beam strikes the road correctly for good nighttime illumination. While the headlights were adjusted correctly when you bought the car, there are things that can throw off the aim, including:

Towing a trailer
Carrying heavy items in the trunk

Honda does not recommend adjusting the headlights on your own, as it requires not only the right tools, but also a space in which to do it properly and knowledge of proper headlight adjustment/aim.

My headlights came on and drained my battery I put a new battery in and my headlights still wouldn’t go off I took out the bulb an
ANSWER : The common thread between the headlights and the signal lights is the combination switch. The combination switch controls your signal lights, turns the headlights on and off, as well as controls the high beam function. Most like;y the switch or wiring to the switch has an electrical short. This can cause constant power going to the functions the switch controls. While the combination switch is the most likely cause, wiring can also be a problem so I suggest having a certified technician look into the lights staying on to determine if there is a wiring issue before replacing any components. If the combination switch is found to be the culprit, the technician can replace it for you.

Headlight Issue
ANSWER : Hello.

The daytime running lights are not supposed to function at the same time as the headlights. The daytime running lights are only supposed to come on during the day, to provide additional visibility for daytime driving, independently of the headlights. When the headlights are turned on the daytime running lights should turn off. If they are not turning on it may be possible that perhaps the bulbs have burned out, or there is an issue with the fuse or relay. If you run into any issues, consider contacting a certified technician, like one from YourMechanic, as certified technician can diagnose any issues with your lights firsthand and help you make the right repair.

air conditioning and headlight aim
ANSWER : Hello. You definitely have two different issues here. The headlight issue should just need to be adjusted. This is assuming that they lights were put in correctly. There is a vertical and horizontal adjusting screw that is used to get the headlamps in the correct position.

As for the blower, this is likely the resistor. Some of the time it can be caused by an electrical short but most of the time it is the resistor. The resistor shorts internally and sticks on one position. This can be tested with a voltage meter first to make sure it is bad. If you want to have this all teken care of for you, consider YourMechanic, as a certified technician can come to your home or office to diagnose the headlight and air conditioning to have these problems resolved.

I am trying to locate the headlight adjuster for my pickup but I can’t find it
ANSWER : There is an adjuster on the outside, near the top of light. You may have to remove the trim panel to get to it. The other is located behind the light on the inside. It is on a long rod with a hex head. Go to this Ford forum post has a helpful reference that may help you.

If you need help with this, consider YourMechanic, as a certified technician can inspect your lights and help you make any adjustments that are necessary. Good luck.

Using aftermarket parts instead of genuine?
ANSWER : Hi there:

There’s a common myth that aftermarket parts lack the quality of OEM parts. However, the reality is that aftermarket auto parts usually are as good of quality – and very often better quality – than their traditional counterparts. This article will give you multiple answers about using aftermarket parts vs. OEM.