Front Left Lower Control Arm w Ball Joint for 1999-2008 BMW - Steel

In this review of the Metrix Premium Front Left Lower Control Arm w Ball Joint & Bushing Assembly, the bottom line is straightforward: this is a direct-fit steel replacement for owners of compatible BMW sedans and Z4 models who need a durable, pre-greased suspension arm. The review finds it best for DIY mechanics and independent shops looking for an OE-interchange option that claims to exceed OEM standards and arrives ready to install. The single biggest reason to buy is the combination of pre-greased components and the manufacturer quality certifications that back long-term reliability.

Key Features

• Compatibility: Fits a wide range of BMW models from 1999 through 2008, reducing uncertainty when ordering a replacement part.
• Pre-greased assembly: Arrives pre-lubricated for extended lifespan and smoother initial movement, saving installation prep time.
• Steel construction: Built from steel for strength and durability under typical road and handling loads in the covered models.
• OE interchange numbers: Matches common part references such as RK80527 and 31121094465 for easier verification and cross-referencing with existing parts.
• Quality certifications: Manufactured to IATF 16949 and ISO 9001 standards, indicating factory-level process controls and traceability.
• Warranty coverage: Comes with a 3 Year / 36,000 mile limited warranty from installation, offering post-installation peace of mind.

Who It's For

This control arm is best for owners of 1999-2000 3 Series sedans, 2001-2006 3 Series coupes and sedans without performance suspension, and 2003-2008 Z4 models who want a reliable, steel OE-style replacement assembled with grease and ready to install. Independent repair shops and competent DIY mechanics who value parts that match OE interchange numbers and carry manufacturer certifications will find this a sensible choice.

It is not the best option for vehicles outside the stated fitment list or for owners requiring performance-tuned suspension components; those seeking adjustable or performance aftermarket arms should look elsewhere. Also, buyers who need a pair or larger kit should note this listing supplies a single left front control arm.

Pros & Cons

Pros

• Good fitment for many BMW 3 Series and Z4 submodels, so replacement ordering is straightforward.
• Pre-greased for immediate use, which simplifies installation and reduces initial wear.
• Backed by IATF 16949 and ISO 9001 manufacturing standards plus a 3 year / 36,000 mile limited warranty.

Cons

• Supplied as a single control arm, so buyers needing both sides must purchase two units separately.
• Steel construction favors durability over weight savings, so it is not a lightweight performance upgrade.

Specifications

Our Verdict

The Metrix Premium front left lower control arm is a practical, value-oriented replacement for owners of the listed BMW 3 Series and Z4 models who need a reliable OE-interchange part. Its pre-greased assembly, steel construction and manufacturing certifications make it a trustworthy choice for routine suspension repairs, provided buyers understand this is a single replacement arm rather than a performance upgrade.

Frequently Asked Questions

Will this fit my 2004 BMW 325i?
Yes, the part lists compatibility with 2001-2005 BMW 325i models without performance suspension.

Does the arm come ready to install?
Yes, the control arm is supplied pre-greased for smoother operation and reduced prep work during installation.

What warranty is included?
The manufacturer provides a 3 Year / 36,000 mile limited warranty from the date of installation.