Restore precise steering and secure front wheel location with the Delphi control arm (TC1749), a front left lower forward control arm and ball joint assembly built with Delphi's OE steering expertise. It installs as a direct-fit replacement across a range of BMW models, including the 2006-2010 323I, 2007-2011 328I, 2007-2013 335I, 2008-2013 128I and 135I, 2009-2016 Z4, and 2013-2014 X1 — see the Buyer's Guide tab for the full list.
This unit combines the lower arm and an integrated ball joint to locate the front wheel while letting the suspension travel and pivot. If a worn control arm or ball joint is behind clunking over the front suspension, wandering steering, or uneven tire wear, this replaces the front left lower forward part. It also serves as a BMW Z4 control arm on 2009-2016 Z4 models. Sold individually and covers the front left lower forward position only; inspect the opposite side and replace as directed by the service procedure for balanced handling.
What position does the Delphi TC1749 fit?
It's the front left lower forward control arm and ball joint assembly, replacing that specific corner only. The other positions use different Delphi part numbers.
Can I use this as a Z4 control arm?
Yes—it's listed for 2009-2016 BMW Z4 models in the front left lower forward position. Confirm your exact year and configuration on the Buyer's Guide tab.
Does the assembly include the ball joint?
Yes. The ball joint is integrated into the control arm, so you replace both the arm and joint together as one unit.
What are signs my control arm or ball joint may need replacing?
Common signs include clunking over the front suspension, wandering or loose steering, and uneven front tire wear. Diagnose the cause before replacing.
How is this Delphi control arm made?
Delphi machines the ball studs to micron tolerances, robot-welds the arm, uses 100% crack and ultrasonic flaw detection to match OE materials, and adds anti-corrosion protection.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
