moog-rk641642 | Rear Left Lower Control Arm | 1998-2003 BMW 540i | MOOG

  • moog-rk641642 Rear Lower Control Arm - Driver Side
  • moog-rk641642 Rear Lower Control Arm - Driver Side
  • moog-rk641642 Rear Lower Control Arm - Driver Side

Rear Lower Control Arm - Driver Side

Manufacturer: MOOG
Part Number: moog-rk641642
Price: $167.29

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Suggested part for moog-rk641642: moog-rk641641
moog-rk641641 Discontinued by Moog
Go ahead and replace your other control arm using Moog's value-driven arm with pre-installed OE style bushings.

  • 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.


    Moog Premium Steering Components carry a Limited Lifetime Warranty. Moog R-Series Control Arms, Hub Assemblies, and Strut Assemblies carry a 3 Year Warranty.

    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.

FitmentRear Lower Control Arm - Driver Side moog-rk641642 fits these vehicles:

moog-rk641642 | Rear Left Lower Control Arm | 1998-2003 BMW 540i | MOOG

2001-2003 BMW 525i
  • Fits 4 door sedan
  • For the 4 door wagon use RK621639
1999-2000 BMW 528i
  • Fits 4 door sedan
1998-2003 BMW 540i
  • Fits 4 door sedan

For the passenger side use RK641641

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.

Moog Stamped Arms
Moog Stamped Arms

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, 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.

Moog Forged Arms
Moog Stamped Arms

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.

Fitment for moog-rk641642
MakeModelYear RangePositionDrive WheelQuantity RequiredEngine BaseEngine VINEngine Designation
BMW525i2003-2001Rear Left Lower Quantity 1
BMW528i2000-1998Rear Left Lower Quantity 1
BMW530i2003-2001Rear Left Lower Quantity 1
BMW540i2003-1998Rear Left Lower Quantity 1

question_answer Customer Questions and Answers

Will the moog-rk641642 fit on my 01 BMW 525I 4 door wagon?
No, the moog-rk641642 is for the Sedan model 01 BMW 525I, the moog-rk621639 is the correct rear left lower arm for the 4 door wagon version of the 01 BMW 525I.