Overview
The Crown Automotive 52059912AC is a coil spring isolator for the front upper position on 2007–2018 Jeep Wrangler JK models. It fits 2-door and 4-door models and is made for the driver or passenger side. An isolator sits between the coil spring and its upper mount, where it cushions the spring seat.
Key features
- Front upper position
- Driver or passenger side
- Fits 2-door and 4-door models
- Crown Automotive part number 52059912AC
- Direct fit
Front upper isolators and wear
The upper isolator sits at the top of the coil spring and carries spring load into the mount, so it helps control noise and vibration in the front suspension. Over time the rubber or foam compresses, hardens or splits, and the result can be a rattle or creak over bumps. Off-road driving with frequent articulation tends to make these parts age faster.
Inspect the isolator each time the coil spring is removed. Check the spring seat, the upper mount and the surrounding hardware for cracks or corrosion, and replace the isolator when its shape has changed. Upper isolators are often replaced alongside the shock or spring when a lift is installed, since those parts share the same load path.
- Compressed or flattened surface
- Cracks or tears
- Rattles over bumps
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 52059912AC |
| UPC | 848399089349 |
| Position | Front upper |
| Side | Driver or passenger |
| Body style | 2-door and 4-door |
| Fitment type | Direct fit |
Vehicle fitment
It is a direct fit for 2007–2018 Jeep Wrangler (JK) models in the 70th Anniversary, 75th Anniversary, Rubicon, Sahara, Sport, Sport S, Unlimited 70th Anniversary, Unlimited 75th Anniversary, Unlimited Rubicon, Unlimited Sahara, Unlimited Sport, Unlimited Sport S, Unlimited X and X trims.
It covers JK models only, so TJ, LJ and JL Wranglers are not included. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Support the suspension safely before removing the isolator, since the coil spring is under load. Follow a repair procedure for your exact vehicle before starting.
What’s included
A coil spring isolator for the front upper position.
Not included: Check the package contents against your installation, including the coil spring and upper mount hardware, before starting.
