2023 Toyota 4Runner Problems: 2 Issues Every Owner Should Know
2023 model year · 1,554+ owner reports · Updated April 2026
According to Au7o's analysis of 1,554+ owner reports, the 2023 Toyota 4Runner has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is KDSS (Kinetic Dynamic Suspension System) Leaks/Corrosion with 876 owner reports. Across all issues, repair costs range from $50 to $4,000. DIY maintenance guides at au7o.io.
All 2 Known Issues
On the 2010-2023 Toyota 4Runner, the KDSS hydraulic suspension system can develop leaks at the hydraulic lines and accumulators, especially in areas with road salt. The system helps reduce body roll on-road while allowing articulation off-road. Corrosion of the KDSS lines is common in northern states.
Common Symptoms
- Hydraulic fluid leaking under front/rear
- KDSS warning light on dash
- Poor handling or excessive body roll
- Clicking from front suspension
- Visible corrosion on KDSS lines
How to Fix
Inspect KDSS lines annually for corrosion. Apply rust protectant to exposed lines. For leaking accumulators: Replace with new units ($300-600 each). Hydraulic line leaks require line replacement. Some owners delete KDSS entirely and install conventional sway bars ($500-1,500). Full KDSS repair at dealer: $1,500-4,000.
What Owners Are Using
Parts and tips from 876+ owners who fixed this issue
- TipDIY repairs can save significantly - dealer charges $300-600 but DIY costs are typically 50-70% less
- TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
- TipSearch Toyota 4Runner forums and owner groups for real-world experiences and DIY guides
- TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
- UpgradeComplete strut and shock absorber set for full suspension refresh (KYB Excel-G Strut/Shock Set)
- UpgradeFour-wheel alignment kit with cam bolts for proper tire wear correction (Moog Alignment Cam Bolt Kit)
On the 2010-2023 Toyota 4Runner, a clunk or pop may be heard from the steering column area when turning the wheel, especially at low speeds or when going from left to right. The issue is typically the intermediate steering shaft or worn rack bushings. Common on vehicles driven off-road.
Common Symptoms
- Clunk when turning wheel at low speed
- Pop when turning from stop
- Noise from steering column area
- Play in steering wheel
How to Fix
For intermediate shaft noise: Lubricate the shaft splines with white lithium grease (temporary fix) or replace shaft ($200-400). For steering rack clunk: Tighten rack mounting bolts or replace rack bushings. Full rack replacement if worn ($800-1,500). Have alignment checked after any steering work.
What Owners Are Using
Parts and tips from 678+ owners who fixed this issue
- TipDIY repairs can save significantly - dealer charges $200-400 but DIY costs are typically 50-70% less
- TipGet a proper diagnosis before replacing parts - similar symptoms can have different causes
- TipSearch Toyota 4Runner forums and owner groups for real-world experiences and DIY guides
- TipGet multiple quotes from independent mechanics - dealer prices can be 2-3x higher for the same repair
- UpgradePolyurethane bushing kit for longer life and tighter handling than OEM rubber (Energy Suspension Bushing Kit)
- UpgradeSway bar end links to eliminate clunking over bumps (Moog Sway Bar Link Kit)