Keep the rear suspension geometry tight and the ride quiet with the Delphi Lateral Arm (TC3259), the rear left lower rearward link that helps locate the wheel and control its position through every bump and turn. It installs as a direct-fit replacement for the 2009-2017 BMW X3 and 2015-2018 BMW X4 — see the Buyer's Guide tab for engine-level fitment.
Delphi applies its OE steering and suspension expertise to this aftermarket arm, backing it with the same testing philosophy used on parts fitted to millions of vehicles worldwide:
- Tested to the extreme: validated below -40°C and above 120°C and exposed to 720 hours of salt spray, with extensive dimensional and material analysis for close OE compatibility.
- 100% inspected: each arm undergoes crack detection and ultrasonic flaw detection so materials match OE specifications.
- Anti-corrosion protection: applied to each part for corrosion prevention and enhanced appearance.
- Complete job: includes the necessary accessories for the installation.
Signs this arm may need replacing include clunking over bumps, uneven rear tire wear, or loose, wandering handling — diagnose the cause before replacing, since worn bushings or ball joints elsewhere can produce similar symptoms.
Interchange: 33 32 6 788 549 · 102-7900
33326788549 · 1027900 · RK643492 · CMS101473
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What position is this lateral arm?
It is the rear left lower rearward lateral arm, a suspension link that helps locate the rear wheel and control its position.
Which vehicles does the Delphi TC3259 fit?
It is a direct-fit replacement for the 2009-2017 BMW X3 and 2015-2018 BMW X4. Check the Buyer's Guide tab to confirm engine-level fitment for your vehicle.
What numbers does this part interchange with?
It cross-references 33 32 6 788 549, 102-7900, RK643492 and CMS101473 (also listed compact as 33326788549 and 1027900).
How is this Delphi arm tested?
Delphi validates it below -40°C and above 120°C, exposes it to 720 hours of salt spray, and runs 100% crack and ultrasonic flaw detection so materials match OE specifications.
What are signs this lateral arm may need replacing?
Clunking over bumps, uneven rear tire wear, or loose handling can signal a worn arm. Diagnose the cause first, since worn bushings or joints elsewhere can cause similar symptoms.
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