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Arnott SK-4209 Suspension Strut and Coil Spring Assembly - Rear Left
| Brand | Arnott SK-4209 |
|---|---|
| Position | Rear Left |
| 10527 | No |
| 10528 | No |
| 10530 | Passive |
| Compressed Length | 395 |
| Travel Length | 145 |
| Mounting Hardware Included | Yes |
| Internal Construction Type | Twin-tube |
| Grade Type | Standard |
| Housing Material | Steel |
| Extended Length | 540 |
| Adjustable | No |
| Lower Mount Type | Loop/eyelet |
| Upper Mount Type | Stud |
| Boot Included | Yes |
| Gas Charged | Yes |
| Body Diameter | 50 |
| Adjustable Damping | No |
| Adjustable Rebound | No |
| Progressive Spring Rate | No |
| Coil Spring Included | Yes |
| Dust Shield Included | Yes |
| Bladder(s) Included | No |
| Bladder Heavy Duty Crimping Rings Included | No |
| Bladder Sleeve(s) Included | No |
| Air Adjustable | No |
| Air Bladder | No |
| Air Bladder Material | No |
| Air Ride Suspension | No |
| Bearing Plate Included | Yes |
| Body End Measuring Point | Center eye |
| Fits | Ford and Lincoln · 8 vehicles |
OE-style replacement. Passive strut design matches original ride behavior without external commands.
Complete assembly. Includes coil spring, boot, dust shield, bearing plate, and isolators.
Steel twin-tube body. Hydraulic damping and gas-charged construction support consistent suspension response.
Cross-references JL1Z18125C and JL1Z18125J for the same application. See all 2.
Overview
Arnott SK-4209 is a rear left suspension strut and coil spring assembly built for vehicles equipped with Continuously Controlled Damping. It is a passive design that matches OE-style stability, handling, control, and comfort without external vehicle commands.
Fits 2018-2021 Ford Expedition, rear left, w/Continuously Controlled Damping (CCD). Fits 2018-2021 Lincoln Navigator, rear left, w/Continuously Controlled Damping (CCD).
Key Features
- Passive strut design for OE-style ride behavior
- Twin-tube steel housing with hydraulic internal damping
- Coil spring, boot, dust shield, bearing plate, and isolators included
- Gas charged construction with linear spring rate
- New suspension strut assembly, part number SK-4209
Detailed Description
The Arnott SK-4209 is engineered as a direct replacement suspension strut and coil spring assembly for the rear left side on select Ford Expedition and Lincoln Navigator models with CCD. Arnott states the internal settings were tested to replicate OE performance, giving the assembly the ride characteristics expected from the original suspension layout. The steel twin-tube body, hydraulic damper, and passive operation make this a practical replacement for restoring consistent rear suspension response. Part number SK-4209 is also referenced by JL1Z18125C and JL1Z18125J for the same application.
Arnott's product line focuses on replacement suspension components that mirror original equipment behavior while using new components and application-specific engineering. For buyers looking for a Lincoln Navigator or Ford Expedition rear left strut assembly, SK-4209 provides a complete suspension unit with spring and related support components already integrated.
What It Helps Address
- Rear suspension sag or reduced ride height
- Excessive bounce or inconsistent damping response
- Noisy or worn strut and spring components
- Loss of OE-like ride control in CCD-equipped vehicles
Installation Notes
Verify fitment by year, make, model, position, and CCD equipment before installation. This assembly uses a loop/eyelet lower mount and stud upper mount, with mounting hardware included. Arnott recommends replacing these struts in pairs to maintain balanced suspension performance.
Quality Assurance
Arnott identifies SK-4209 as a new, application-specific replacement built to match OE performance targets through tested internal strut settings and passive operation.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2021 | Ford | Expedition | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2021 | Lincoln | Navigator | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2020 | Ford | Expedition | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2020 | Lincoln | Navigator | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2019 | Ford | Expedition | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2019 | Lincoln | Navigator | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2018 | Ford | Expedition | Rear Left | w/Continuously Controlled Damping (CCD) |
| 2018 | Lincoln | Navigator | Rear Left | w/Continuously Controlled Damping (CCD) |
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