Does the LX470 have hydraulic suspension?
The Lexus LX470, produced from 1998 to 2007, uses a hydraulic height-control system known as Active Height Control (AHC) to adjust ride height and keep the body level. This is a hydraulic setup integrated with the vehicle’s coil-sprung suspension, not a conventional air-suspension system.
What kind of suspension does the LX470 use?
In terms of its overall suspension layout, the LX470 employs a double-wishbone front suspension and a multi-link rear suspension with coil springs. The characteristic feature is the hydraulic Active Height Control system, which can raise or lower each corner to compensate for load and terrain, helping maintain level stability and improve off-road clearance.
Key components of the hydraulic height-control system include:
- Hydraulic pump and reservoir located in the engine bay
- Height sensors that monitor load and ride height at each corner
- Hydraulic lines and actuators integrated into the front struts and rear suspension
- Valve block and control module that modulate fluid flow to raise or lower the chassis
Together, these parts enable automatic leveling and adjustable ride height, which supports load management and off-road capabilities while maintaining stable handling on varied surfaces.
Maintenance and reliability
Like any aging hydraulic system, the LX470’s AHC requires periodic inspection. Common issues cited by owners include hydraulic leaks, pump wear, and sensor or valve-block faults that can affect leveling accuracy. Proper maintenance involves checking for leaks, testing the height-adjustment function, and addressing any sensor or pump issues promptly to preserve performance.
Typical maintenance considerations include:
- Inspecting for fluid leaks at hoses, fittings, and actuators
- Checking the hydraulic pump and lines for wear or damage
- Testing height sensors and the leveling control system for proper function
- Seeking professional diagnostics if the system shows erratic leveling or sagging at corners
Regular inspection and timely repairs help maintain the LX470’s intended ride height and off-road capability over time.
Summary
The LX470 does have a hydraulic suspension system—specifically, an Active Height Control (AHC) system that uses hydraulic pressure to adjust ride height at each corner. It’s integrated with coil springs rather than air springs, and while generally reliable, it requires attention to leaks, pump wear, and sensor alignment as the vehicle ages.
What is the difference between a GX 470 and an LX 470?
In comparing the Lexus GX 470's and the Lexus LX 470's specifications and ratings, the Lexus GX 470 has the advantage in the areas of typical lower range of pricing for one- to five-year-old used cars, and fuel efficiency. The Lexus LX 470 has the advantage in the area of base engine power.
What are the common problems for an LX470?
Top Lexus LX470 Problems
- Check Engine Light due to EVAP system fault.
- Loud Vacuum Cleaner Noise on Cold Start.
- Check Engine Light Due to EVAP System.
- Check Engine Light Due to Failed Oxygen Sensor Component.
- Check Engine Light Due to EVAP System Failure.
- Lexus LX470 engine cranks but randomly won't turn over.
What type of suspension does the Lexus LX have?
Suspension included Adjustable Height Control (AHC) hydraulic suspension and Adaptive Variable Suspension (AVS).
What years to avoid Lexus LX 470?
While the Lexus LX470 is generally reliable, the pre-2003 models are the ones to approach with caution due to their less durable four-speed automatic transmission and potential for drivetrain backlash. Owners of all LX470s should also be aware of the potential for issues with older components like window and door lock actuators and possible EVAP system problems, and be prepared for potentially expensive repairs on any used vehicle, notes SlashGear.
This video explains some of the potential problems to check for when buying a used Lexus LX470: 53sBefore BuyingYouTube · Dec 7, 2022
Years to be cautious about
- Pre-2003 models: These models are known to have a less robust four-speed automatic transmission, which can develop backlash (a clunking noise when shifting).
- Drivetrain issues: While the 2003-2007 models have a stronger five-speed transmission, they can still experience drivetrain backlash, especially with demanding use or high mileage. This is often due to worn-out components in the front gearbox, transfer case, and other parts.
Other potential issues to consider
- Electrical components: As the vehicles age, components like window motors, seat motors, and door lock actuators are more prone to failure due to their age and wear and tear, says a YouTube video.
- EVAP system: The Check Engine light can be triggered by faults in the EVAP system or a failed oxygen sensor, according to RepairPal.
- Starting issues: Some models, particularly the earlier ones, may experience stalling and idle instability or a crank-no-start condition due to immobilizer or fuel pump relay issues.
