Rennline Ball Joint Nut. Porsche 911/914  ❭  S98013P

Wishbone Ball Joint Front
This OE Match front wishbone ball joint is a direct replacement for the original Porsche suspension component fitted to Porsche 911 models produced  and Porsche 914. It connects the front wishbone (control arm) to the wheel carrier, allowing controlled suspension articulation and accurate steering movement.
Sold individually, 2 required per vehicle

Early type with round cut out. Requires round pin. Not included with the ball joint.

Fits:
Porsche 911 08/1969 - 07/1971
Porsche 914 1970 - 1972

Diagram ref no 13

Installed at the outer end of the front lower wishbone/control arm, the ball joint forms a critical pivot point between the suspension arm and wheel hub carrier. It allows controlled articulation during steering and suspension travel while maintaining correct wheel alignment and suspension movement. Proper ball joint operation is essential for steering accuracy, chassis stability, and predictable handling.

This early-style ball joint features the correct configuration for early Porsche suspension systems and is suitable for restoration work, suspension refurbishment, or replacement of worn original components. Certain versions are supplied with lock plate and split pin hardware depending on application.

The front wishbone ball joint connects the lower control arm to the wheel carrier while allowing controlled steering and suspension movement. It supports stable handling, precise steering response, and proper front wheel alignment.

Function
•  Connects front wishbone/control arm to wheel carrier
•  Allows steering and suspension articulation
•  Maintains correct front suspension geometry
•  Supports precise steering response and stable handling
•  Helps reduce suspension play and uneven tyre wear

Ball joints are subjected to constant suspension load, steering movement, and road vibration. Over time, internal wear can create excessive play within the joint, leading to vague steering, suspension knocking noises, unstable handling, and uneven tyre wear. Replacing worn ball joints restores safe suspension operation and factory steering precision.

When to replace
•  Excessive steering play or vague handling
•  Knocking or clunking noises from front suspension
•  Uneven front tyre wear
•  Failed suspension inspection or MOT
•  Visible wear or looseness in suspension joint
•  During front suspension rebuild or restoration

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90134104904

The product you are viewing cross references to these numbers

Wishbone ball joint front - cotter pin
Ball joint lock pin is an suspension fastener designed to secure the front lower ball joint to the strut or wishbone assembly on classic Porsche models. It installs into the ball joint mount to secure the connection between suspension links and steering knuckles. It’s suitable for maintenance, rebuilds, or restoration of front suspension components and fits directly without modification.
Sold each, Fits left and right.

Fits:
Porsche 911 1969 - 1989
Porsche 914 1972 - 1976

Diagram ref no 20

The lock pin provides a secure fastening point that holds the front lower ball joint in place, ensuring the suspension components remain correctly aligned under load and motion. It helps transmit steering forces while keeping the joint assembly stable during driving.

Installed through the ball joint and suspension link interface, this pin maintains clamping and positional integrity, aiding the suspension’s ability to articulate smoothly while resisting unwanted movement. It works in conjunction with the control arm and steering knuckle to support safe, responsive handling.

Front suspension hardware like the ball joint lock pin can wear, corrode, or lose clamping strength over time, which may lead to play in the suspension, uneven tyre wear, and compromised steering feel. Replacing worn or damaged pins with OE Match parts helps maintain precise suspension geometry and consistent handling characteristics.

When to replace:
•  Ball joint pin is corroded, bent, or worn
•  Loose or sloppy front suspension feel
•  During ball joint, control arm, or strut service
•  Restoration of classic suspension systems
•  After removal or disassembly of front suspension

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91134111907

The product you are viewing cross references to these numbers

Wishbone Ball Joint Front - Cotter Pin Nut.
Fits Left And Right.
Sold Each.

Fits:
Porsche 911 1969>>1989
Porsche 914 1972>>1976

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90008400402

The product you are viewing cross references to these numbers