8-Piece Rear Control Arm Kit for Chrysler 300 & Dodge Charger, Challenger, Magnum (2005-2015) - 68045330AC, 68051638AB

If your Chrysler 300 or Dodge Charger has started clunking over bumps, wandering a little on the highway, or eating rear tires unevenly, the rear control arms are one of the first things worth checking. This 8-piece kit is built around the shared rear suspension design of the Chrysler LX and LC platform, and it's a straightforward way to search "Chrysler 300 Dodge Charger control arms" and land on a set that actually covers the whole rear end instead of one arm at a time.

One Kit, Five Vehicles

This isn't a Charger-only part or a 300-only part. The rear suspension geometry is shared across the whole LX/LC family, so the same eight arms fit:

• Chrysler 300C, 2005-2014
• Chrysler 300, 2005-2014
• Dodge Charger, 2006-2014
• Dodge Challenger, 2008-2015
• Dodge Magnum, 2005-2008

If you're not sure whether your particular trim uses this exact arm, cross-reference the OE and aftermarket part numbers below against what's stamped or listed for your VIN before ordering — that's the most reliable way to confirm fitment on any of these five models.

Chrysler 300 Dodge Charger Control Arms: What's in the Box

This is a full rear kit, all eight pieces, not a partial set you'll need to supplement later:

• 2x Rear Left Driver Side Lower Control Arm (K641772)
• 1x Rear Right Lower Rearward Control Arm (K641649)
• 1x Rear Left Lower Rearward Control Arm (K641650)
• 2x Rear Upper Forward Control Arms (K641787)
• 1x Rear Right Rearward Upper Control Arm (K641519)
• 1x Rear Left Rearward Upper Control Arm (K641520)

Each arm comes as a complete assembly with the ball joint and rubber bushing already installed, so you're not sourcing those separately or pressing in your own bushings. That matters more than it sounds like on this platform — the rear arms on these cars aren't cheap to buy piecemeal, and replacing all of them at once (rather than one at a time as each fails) is usually the smarter move if the car has meaningful mileage on it, since the bushings on the arms you leave alone are wearing on the same timeline anyway.

Built to Hold Up, Not Just Fit

The arms themselves are steel with a powder-coated finish, which is the right call for anything living in the wheel well — powder coating shrugs off road salt, moisture, and general underbody grime a lot better than a painted or bare finish would. The bushings are rubber, matching what these cars came with from the factory, so ride feel stays close to stock rather than getting stiffer or noisier the way some polyurethane replacements can. Every arm in the kit is new, tested before it ships, and machined to the fitment and structural specs these platforms call for — this is a direct replacement, not a universal-fit part you have to modify to make work.

Specifications

• Material: Steel
• Surface finish: Powder coated
• Bushing type: Rubber
• Placement on vehicle: Left, Right, Upper, Lower, Rear
• Kit dimensions: 41 x 38 x 14 cm
• Weight: 8800g (8.8 kg)
• Pieces: 8

OE and Cross-Reference Numbers

This kit cross-references to the following part numbers, so if you're working from a parts catalog or matching against what your local shop pulled up, these are the numbers to check against: 68045330AC, 68051638AB, 4782536AB, 68184784AA, 521-947, 521-948, 522-143, 522-382, 522-866, CMS251109, K641772, K641649, K641650, K641519, K641520, K641787, CMS251010, CMS251011, CMS251014, CMS251015, and CMS251016.

Why Replace All Eight at Once

It's tempting to just replace the one arm that's obviously clunking and leave the rest alone, and sometimes that's a fine short-term fix. But on a car in this age range, if one rear bushing has gone soft or one ball joint has developed play, the other seven arms have seen the same road salt, the same heat cycles, and roughly the same mileage. Doing the whole rear end in one job means you're not back under the car again in six months for the next arm over, and it also gives you a clean, even baseline for the alignment shop to work from afterward — which you'll want regardless of how many arms you're swapping, since rear toe and camber settings on this platform are sensitive to control arm length and bushing condition. A control arm is one of the harder-working links in a suspension system, connecting the wheel hub to the chassis and controlling wheel movement, so it's not a part worth being casual about once it's past its prime.

Installation Notes

This is a bolt-in replacement for the factory arms, using the factory mounting points on all five vehicles listed above. Basic hand tools and a way to safely support the rear end will get you through it; a ball-joint separator makes the job faster if the OE ball joints have seized in the knuckle. As with any rear suspension work, plan on a wheel alignment once everything is torqued down — new arms change ride height and geometry just enough that skipping the alignment will show up as uneven tire wear within a few thousand miles.

Questions Before You Order

If you're not 100% sure this is the right kit for your VIN or trim level, it's worth double-checking before it ships rather than after. Our frequently asked questions page covers the most common fitment and ordering questions, and our contact page is the fastest way to reach us directly if your question isn't answered there. We also keep a straightforward warranty policy on file so you know what's covered if something isn't right out of the box, along with details on shipping and how to track an order once it's on its way. If you're hunting for a part that isn't listed on the site yet, our request a part page is the right place to start.

For more rear and front suspension components across other makes and models, browse our full suspension parts collection or the broader suspension & steering collection for related steering and chassis parts that often get replaced alongside control arms.