Front Left Lower Control Arm with Ball Joint - Aluminium RK620179

Our review of the Front Left Lower Control Arm with Ball Joint finds it best suited to DIY mechanics and independent shops needing a direct-fit replacement for mid-2000s GM sedans. The bottom line: this control arm is a straightforward, robust aluminium replacement that prioritizes fit and durability over fancy extras. It installs like an OE-style unit, comes with a cotter pin and a single-arm quantity per box, and is backed by a 3 year / 36,000 mile limited warranty, which is the main reason a buyer seeking a long-term, reliable suspension fix should consider it.

Key Features

• Vehicle compatibility: Direct fit for 2007-2009 Saturn Aura and many Pontiac and Chevrolet Malibu model years, saving time on part searching.
• Material: Aluminium construction provides a good balance of strength and weight savings compared with heavier steel alternatives.
• Included hardware: Ships with a cotter pin so installers have the small hardware needed to secure the ball joint during reassembly.
• OE interchangeability: Matches OE/interchange numbers such as RK620179 and CMS50122 so it is easy to confirm fit with existing parts lists.
• Quality certification: Manufactured under IATF 16949 and ISO 9001 processes, which supports consistent build quality and traceability.
• Warranty: The 3 year / 36,000 mile limited warranty provides added confidence for longer-term ownership after installation.

Who It's For

This control arm is aimed at owners of compatible Saturn Aura, Pontiac G6, and Chevrolet Malibu models who want a reliable, OE-style replacement without paying for OEM branding. It works well for independent mechanics and experienced DIYers who prefer a part that fits to factory specifications and includes the small cotter pin hardware needed at reassembly.

Customers who need a multi-piece kit, adjustable control arms, or a part for non-listed vehicles should look elsewhere. Also, buyers seeking aftermarket tuning or enhanced performance geometry should choose a dedicated performance control arm rather than this direct replacement aluminium unit.

Pros & Cons

Pros

• Good fitment for listed model years, matching common OE interchange numbers for easy verification.
• Aluminium construction that balances strength and reduced weight compared with heavier cast parts.
• Positive customer feedback on fit, quality and ease of installation makes it a practical, value-oriented choice.
• Backed by a 3 year / 36,000 mile limited warranty for added peace of mind.

Cons

• Sold as a single arm with one cotter pin; replacing both sides requires purchasing another unit separately.
• Not a performance-adjustable arm, so it is not intended for alignment tuning beyond factory tolerances.

Specifications

Brand	METRIX PREMIUM CHASSIS PARTS
Application	Front left lower control arm with ball joint
Compatible models	2007-2009 Saturn Aura; 2005-2010 Pontiac G6; 2004-2005 & 2006-2012 Chevrolet Malibu
Material	Aluminium
Included hardware	Cotter pin
OE/Interchange numbers	RK620179, CMS50122, 520-163, 10379341
Warranty	3 Year / 36,000 miles Limited Warranty

Our Verdict

For owners of the listed Saturn, Pontiac and Chevrolet models who need a dependable, direct-fit replacement, this aluminium front left lower control arm is a sensible purchase. It offers reliable fitment, relevant OE interchange numbers, and a useful warranty, making it a cost-effective way to restore steering and suspension geometry without overspending on OEM-labeled parts.

Frequently Asked Questions

Will this control arm fit my 2008 Pontiac G6?
Yes, 2005-2010 Pontiac G6 models are listed as compatible, so it is a direct replacement for a 2008 G6 when matching OE numbers.

Does the part include the ball joint and hardware?
The unit is supplied with the ball joint assembled and includes a cotter pin; the box contains one control arm.

Is there any warranty coverage?
Yes, Metrix Premium Chassis Parts include a 3 year / 36,000 mile limited warranty from the date of installation.