Genuine Lemforder Front / Rear Left Upper Track Control Arm - 3931401
Key Points
Quantity Includ...Genuine Lemforder Front / Rear Left Upper Track Control Arm - 3931401
Key Points
Quantity Included:
1 - Sold Individually
Material:
Aluminium
Product Description
If you are suffering handling problems or bad tracking, or your car feels like it is 'leaning' or not responding well, then you may have a suspension arm issue.
The suspension arm is an integral part of your car's suspension system and helps support the vehicle body above the chassis and axles. I. Control/Trailing Arm Type: Control Arm; Fitting Position: Front Axle, Left, Upper, Rear; Material: Aluminium; paired article number: 39315 01; AUDI: A4 B9 Avant (8W5, 8WD),A5 Sportback (F5A),A4 B9 Limousine (8W2, 8WC),A5 Coupe (F53),A4 Allroad (8WH, B9),A5 Cabrio (F57); 8W0407509A, 8W0407509B, 8W0407509E, 8WD407509; Track control arm,Wishbone,Control arm,Trailing arm,Suspension control arm,Wishbone suspension Manufactured to German Original Equipment (OE) quality Accurate and precise wheel guidance Increased driving comfort due to vibration damping Please use the vehicle Confirmed Fit option above to confirm that this part is suitable for your vehicle OE Numbers: 8W0 407 509 A, 8W0 407 509 B, 8W0 407 509 E, 022 260 140 504-03, 022 262 140 504-02, 022 290 140 504-01, 022 292 140 504-01, 8WD 407 509
AmazonLEMFÖRDER 39314 01 Control/Trailing Arm Wheel Suspension Compatible for Audi A4 B9 (8W2, 8WC) 2015 - Left, Rear, Upper, Front Axle and Other Vehicles
The Lemforder Control Arm 39314 01 is designed for Audi A4 and A5 owners looking to restore factory-level handling and suspension precision. It is an ideal replacement for vehicles experiencing vague steering, alignment issues, or suspension leaning, providing OE-quality vibration damping for a smoother ride. Note that this component is sold individually, so users should verify if their suspension service requires replacing the paired control arm simultaneously to maintain balanced geometry.
All features
Model Part Number
39314 01
Brand
LEMFÖRDER
Extended Product Information
FAQs
Is this part sold as a pair?
No, the Lemforder 39314 01 is sold as a single unit. It is often recommended to replace both sides of the axle at the same time.
Do I need to get an alignment after installation?
Yes, replacing any suspension control arm will alter your vehicle's alignment and requires a professional four-wheel alignment to prevent tire damage.
Is this an aftermarket or OE part?
Lemforder is a Tier-1 supplier to Audi, meaning this part is manufactured to German Original Equipment (OE) quality standards.
Does it come with new bushings?
Yes, this control arm comes pre-fitted with the necessary bushings and ball joints for a complete replacement.
What does the paired article number mean?
The paired article number (39315 01) refers to the corresponding arm for the opposite side of the vehicle, which is often replaced concurrently.
Troubleshooting
Steering feels loose after installation
Ensure the suspension geometry was re-aligned by a professional and all mounting bolts were torqued to factory specifications under load.
Creaking noise from the front wheel well
Check that the control arm bolts were not over-tightened and verify that the rubber bushing seat is free of road debris.
Pros and Cons
Pros
Matches original Audi factory performance standards
High-grade aluminium for corrosion resistance and durability
Restores steering responsiveness and handling precision
Reduces cabin vibration through improved bushing design
Cons
Sold as a single unit, often requiring the purchase of a pair
Requires professional alignment after installation
Installation involves complex suspension geometry
Setup, Compatibility & Care
This control arm is compatible with Audi A4 B9 (Avant, Limousine, Allroad) and A5 (Sportback, Coupe, Cabrio) models. Always verify your specific VIN against the OE numbers 8W0 407 509 A/B/E before purchase. Professional installation is strongly recommended as the suspension must be loaded to the correct ride height before final torque tightening of the bushing bolts to prevent premature failure. Periodic inspection of the rubber bushings for cracking or fluid leaks during every oil change will ensure a longer service life.