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Moog fulfills their warranty through their individual dealers. That means that in order to receive warranty support, you will have to refer back to the original dealer you purchased the part from. Be sure to check the dealer's warranty support before you buy the part to make sure that they will properly support the warranty. If a dealer will only refer you back to the manufacturer in order to receive warranty support, then you may not actually have any warranty at all.
Part of our warranty process includes reviewing evidence of the defect provided by the customer. This is easily accomplished by providing video or images of the defective part so our staff can verify the claim and move forward with the warranty process. This removes the necessity of shipping the part back to our facility at the customer's expense.
WARRANTY:
Moog Premium Steering Components carry a Limited Lifetime Warranty. Moog R-Series Control Arms, Hub Assemblies, and Knuckle Assemblies carry a 3 Year or 36,000 mile Warranty (whichever occurs first). Above warranties are based on customers who own a car, van, SUV or light truck (less than 8,000 lbs. or 3,625 kilograms).
Moog warranties their parts to be free of defects in materials and/or workmanship during these timeframes as measured from the date of purchase.
If a Moog part should fail due to materials or manufacturing defect while under warranty, we will provide a replacement of the part upon return of the defective part.
Wearable RUBBER parts are not covered under warranty (Dust boots, bushings, bump stops, etc.)
What is the Difference Between Moog R Series and CK Control Arms?
CK, K or RK? We here at Diverse Suspension Technologies get this question a whole lot. If you are putting parts on your vehicle, you want to know exactly what you are installing. It can be hard to do that with all of these letter designations. So here is all that you need to know to clear up the confusion.
Short Answer: R Series is a value-driven replacement part while the CK Series incorporates Moog's premium Problem Solver components for a better than OE upgrade.


CK (K): Moog Problem Solver
Starting with the CK and K. Whether you see a "K" designation or a "CK" designation, you are getting the same part. The CK and K are Moogs Premium line of control arms. Utilizing their "problem solver" technology, these control arms address common factory design issues providing a better than the original replacement for your vehicle. Most CK and K control arms include ball joints that are powder coated metal with gusher bearings giving them a long life. Many of these ball joints are serviceable and have grease fittings. The CK and K arms also have problem solver bushings and a precise fit and form for easy installation.
RK: Moog R Series
The RK series is a more value-driven part. Because there are so many different vehicles both foreign and domestic, Moog has introduced the R-Series arms to provide replacements for a wide range of vehicles. The RK arms have OE fit and form geometry alignment, with pre-installed OE style bushings and most include the ball joints. However, not all RK series ball joints are serviceable like the CK arms. All of the R Series arms have Moog validated construction and design, providing a less expensive alternative.


Type and Warranty
Each line of control arms has Forged Steel, Stamped Steel, or Forged Aluminium arms to provide the best style for your specific vehicle. The Premium CK line has a limited lifetime warranty, and the RK has a 3 year warranty that are both handled through our awesome customer service team at DST. Whether you are looking for a "light on the wallet" OE replacement, or a "premium" control arm upgrade, Moog control arms are a great choice for your vehicle.

Product Reviews for Front Upper Control Arm and Ball Joint | GMC Sierra
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MOOG moog-ck620054
starstarstarstarstar" Looked good came fast "
So far so good dont think Ill be having anymore problem thanks to Moog.
verified_user Verified Buyer - Jake - . MOOG moog-ck620054 - 5 out of 5starstarstarstarstar" Review 2 Years Later "
Seems to be fine like I would expect out of moog ( with regular greasing of course).
verified_user Verified Buyer - Dan Amburgey - . MOOG moog-ck620054 - 5 out of 5starstarstarstarstar" Looked good came fast "
So far so good dont think Ill be having anymore problem thanks to Moog.
verified_user Verified Buyer - Jake - . MOOG moog-ck620054 - 5 out of 5starstarstarstarstar" good parts and a good value "
Moog is top quality!
verified_user Verified Buyer - melissa dancer - . MOOG moog-ck620054 - 5 out of 5question_answer Customer Questions and Answers
- Question:
- Is it the same part number for both left and right?
- Answer:
- moog-ck620054 will fit the left and right side for the upper control arm.
- Question:
- What difference is there between moog-ck620054 and moog-ck620053?
- Answer:
- The CK620053 comes with offset control arm bushings which will supply an additional 2 degrees of camber. You would want these if you have a lift kit and your camber is already maxed out. CK620054 comes with the standard bushings giving no extra cambe er adjustment. ...see more
- Question:
- What is the difference between part numbers ck620054 and ck620053?
- Answer:
- Part number ck620054 has the standard bushings and part number ck620053 has the offset bushings.
- Question:
- What is the difference between part numbers ck620054 and rk620054?
- Answer:
- Part number ck620054 is part of Moog's problem solver line, comes with a greaseable ball joint and has a lifetime warranty. Part number rk620054 is the standard replacement, does not have a greaseable ball joint, and has a 3 year warranty.
- Question:
- What is the part number for just the dust boot from part number ck620054?
- Answer:
- Moog does not sell their dust boots separately from the part itself.
- Question:
- Does part number ck620054 include the offset bushings?
- Answer:
- No, part number ck620054 does not include the offset bushings.
- Question:
- Are these polyurethane bushings in the arm ck620054? it's for a 2003 GMC Sierra 2500hd.
- Answer:
- No, Moog does not make polyurethane bushings within their control arms. I do apologize for this inconvenience. However, if you want polyurethane control arms bushings the best part to get is 3.3185 https://www.suspension.com/3.3185 these will work on n the CK Moog arms. ...see more
- Question:
- When searching for control arms (upper/lower), it shows 2 types for the upper and lower. However the lower ones look the same but have 100$ in price difference. Can you explain what the difference is between the two?
- Answer:
- Starting with the CK.The CK are Moog's Premium line of control arms. Utilizing their “problem solver” technology, these control arms address common factory design issues providing a better than the original replacement for your vehicle. Most CK cont trol arms include ball joints that are powder coated metal with gusher bearings giving them a long life. These ball joints are serviceable and have grease fittings. The CK arms also have problem solver bushings and a precise fit and form for easy installation. The RK series is a more value-driven part. Because there are so many different vehicles both foreign and domestic, Moog has introduced the R-Series arms to provide replacements for a wide range of vehicles. The RK arms have OE fit and form geometry alignment, with pre-installed OE style bushings and most include the ball joints. However, these ball joints are not serviceable like the CK arms. All of the R Series arms have Moog validated construction and design, providing a less expensive alternative. ...see more
- Question:
- JUST WANT TO KNOW THE DIFFERENCE BETWEEN PART NUMBERS CK620054 ANDE RK620054?
- Answer:
- Put this link in a Google or Yahoo search: https://www.suspension.com/blog/moog-control-arms-ck-k-or-rk/. It will explain the difference between the RK and CK Moog control arms. Disregard all the references to the K series. It has been discontinued.
- Question:
- How many per order per box?
- Answer:
- Moog control arms are sold individually. Not in pairs.