2024 Toyota 4Runner Trim Levels: Which Ones Have X-REAS Suspension?

The 2024 Toyota 4Runner carries over a suspension technology called X-REAS — a system that's been part of the 4Runner lineup for years but isn't available across every trim. If you're comparing trims or trying to understand what that suspension actually does, here's how it works and where it fits in the lineup.

What Is X-REAS Suspension?

X-REAS stands for Cross-Linked Relative Absorber System. It's a passive suspension system developed by Toyota that hydraulically links the shock absorbers in a diagonal, cross-linked pattern — front-left to rear-right, and front-right to rear-left.

When the vehicle encounters a cornering or body-roll situation, fluid transfers between the diagonally paired shocks. This creates a counterforce that resists body roll without requiring active electronics or a separate stabilizer bar intervention. The result is improved on-road handling stability — particularly during cornering — while still allowing independent wheel travel for off-road use.

It's worth being clear about what X-REAS is not: it's not an active or electronically controlled suspension system. It doesn't adjust ride height, monitor road conditions in real time, or stiffen automatically. It's a passive, hydraulic system. That distinction matters when comparing it to true adaptive or air suspension systems found in other vehicles.

Which 2024 4Runner Trims Include X-REAS?

The 2024 4Runner lineup includes several trims, and X-REAS is not standard across all of them. Here's how the suspension offerings generally break down:

🔍 Important note: Trim configurations and available packages can shift between model years and markets. Always verify the current build sheet or window sticker for any specific vehicle, as Toyota sometimes adjusts content mid-year or by region.

X-REAS vs. KDSS vs. Fox Shocks: What's the Difference?

The 4Runner uses different suspension upgrades depending on the intended purpose of each trim:

X-REAS (TRD Sport, Limited): Designed to improve on-road handling and reduce body roll. These trims are oriented more toward comfort and highway driving than extreme off-road use. X-REAS prioritizes stability during normal driving conditions.

KDSS — Kinetic Dynamic Suspension System (TRD Off-Road trims, optional): A hydraulic sway bar disconnect system that improves wheel articulation off-road by allowing the front and rear sway bars to disengage when the terrain demands it. KDSS is oriented toward off-road capability, not on-road sport handling. Some buyers find it trades a degree of on-road cornering firmness for better rock-crawling and trail performance.

Fox Internal Bypass Shocks (TRD Pro): The TRD Pro uses remote-reservoir Fox shocks tuned specifically for high-speed off-road performance and trail durability. These are the most capable shocks in the lineup for off-road use.

The key takeaway: X-REAS and KDSS serve different purposes and are not interchangeable. Choosing between them depends on how and where you plan to drive.

Why It Matters for Maintenance and Repair

Understanding which suspension your 4Runner has is important before any maintenance work begins. X-REAS shocks are not standard shock absorbers — they have hydraulic cross-linking connections that require specific handling during service or replacement.

A few practical considerations:

• Replacement parts: X-REAS shocks must be replaced as a set or with compatible components. Using standard aftermarket shocks without accounting for the cross-link system can affect handling balance and may require removing or bypassing the interconnect lines.
• Diagnosis: If one X-REAS shock fails, symptoms may appear as unusual handling or asymmetric body roll — not always the obvious bounce or leak signs that come with conventional shock failure. A technician unfamiliar with the system may misdiagnose the problem.
• Aftermarket upgrades: Many 4Runner owners who want to lift or modify their suspension choose to delete X-REAS and replace it with a conventional or upgraded shock setup. This is a common modification, but it requires specific parts and knowledge of how the cross-link plumbing is routed.
• Repair costs: Labor and parts costs for X-REAS suspension work vary by region, shop, and the extent of the service needed. Because the system is more complex than standard shocks, labor time and diagnostic fees can run higher than a conventional shock job.

The Variables That Shape Individual Outcomes 🔧

How this suspension system affects your ownership experience depends on factors that differ from one driver to the next:

• Driving environment: Urban highway drivers may never stress the system in ways that reveal wear, while off-road drivers may put shocks under significantly more load
• Modification history: A lifted 4Runner or one with aftermarket wheels and tires may have altered suspension geometry that interacts differently with X-REAS
• Mileage and age: Hydraulic systems can degrade over time — fluid leaks, diminished cross-link response, or bushing wear all affect performance in ways that accumulate gradually
• Service history: Whether the system has been properly inspected or serviced by someone familiar with X-REAS matters for its current condition
• Geographic region: Mechanics in areas where 4Runners are common off-road vehicles tend to have more hands-on experience with these systems

The right trim for a given buyer, and the right maintenance approach for a given vehicle, depends on how those variables apply to the specific truck — not just the badge on the tailgate.