Auxiliary support cross tube for cars with spring struts. Porsche 911 69-71  ❭  90134101304

Auxiliary Support Cross Tube for Cars with Spring Struts

Restore the front suspension structure of your classic Porsche with this OE Match Auxiliary Support Cross Tube. The cross tube forms part of the front suspension assembly, providing a strong mounting structure that helps locate and support suspension components while maintaining correct geometry.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram ref no 1

What Does the Auxiliary Support Cross Tube Do?

The auxiliary support cross tube is mounted across the front underside of the vehicle and forms an important structural part of the suspension system.

Its functions include:

• Supporting front suspension components
• Providing secure suspension mounting points
• Helping maintain correct suspension geometry
• Maintaining structural rigidity across the front suspension
• Supporting accurate steering and suspension operation

Because suspension loads are transferred through this area, the condition and alignment of the cross tube are important for correct handling.

Why Do Auxiliary Support Cross Tubes Fail?

Unlike a normal service component, the cross tube does not have a scheduled replacement interval. Damage is generally caused by age, corrosion, accident damage or previous repairs.

Common problems include:

• Corrosion and rust
• Damage around mounting points
• Distortion caused by accident impact
• Cracks or metal fatigue
• Damage from incorrect jacking or lifting
• Worn or enlarged mounting holes
• Previous poor-quality repairs
• General deterioration on older vehicles

Corrosion is particularly important on early Porsche 911 models, where decades of exposure to moisture and road contamination can weaken suspension mounting areas.

When Should the Cross Tube Be Replaced?

Replacement should be considered if:

• Significant corrosion is present
• Suspension mounting points are damaged
• The cross tube is bent or distorted
• Cracks or structural damage are found
• Suspension geometry cannot be correctly adjusted
• Accident damage has affected the front suspension
• Previous repairs have compromised its strength
• The component is unsuitable for reuse during restoration

Any suspected structural damage should be carefully inspected before the vehicle is returned to the road.

Important Front Suspension Checks

When replacing the auxiliary support cross tube, the surrounding suspension and mounting areas should also be inspected.

Check the spring struts, suspension arms, bushes, ball joints, steering components, mounting hardware and body attachment points for wear, corrosion or damage.

A wheel alignment should be carried out where necessary after suspension components have been replaced or disturbed.

Porsche 911 1969-71 Front Suspension Cross Tubes

Early Porsche 911 suspension components are now several decades old, making corrosion, previous accident damage and general deterioration increasingly common.

The auxiliary support cross tube is an important part of the front suspension structure. Damage or corrosion can affect suspension mounting, alignment and overall front suspension integrity.

During restoration of a 1969, 1970 or 1971 Porsche 911, the cross tube and surrounding suspension mounting areas should be carefully inspected, particularly where corrosion or previous repairs are visible.