2018 Lexus LS500
The 2018 Lexus LS 500 marked a significant departure for the flagship sedan, introducing a turbocharged V6 engine and a more dynamic driving experience. Available with either rear-wheel drive or all-wheel drive, the LS 500 offers a blend of luxury, technology, and performance. The standard engine is a 3.5-liter twin-turbo V6 producing 416 horsepower and 442 lb-ft of torque, paired with a 10-speed automatic transmission. The LS500 is praised for its opulent interior, smooth ride (especially with the air suspension), and advanced technology features. Common complaints include a somewhat convoluted infotainment system and a polarizing exterior design for some. Here is a breakdown of common issues and complaints specific to the 2018 Lexus LS 500:
Engine
3.5L Twin-Turbo V6
- Turbocharger Failure
- Description/Symptoms: Whining or whistling noise from the engine bay, loss of power, check engine light. Can be caused by oil starvation or premature wear.
- Solution: Replacement of the turbocharger(s). Check oil lines for blockage.
- Estimated Cost to Fix: $2,500 - $4,000+ per turbo (parts and labor)
- Recalls: None Found
- Coolant Leak from Turbocharger Lines
- Description/Symptoms: Coolant smell, low coolant level, overheating, visible leaks around the turbocharger area.
- Solution: Replace leaking coolant lines and potentially damaged seals.
- Estimated Cost to Fix: $500 - $1500+ (depending on the location and complexity)
- Recalls: None Found
Transmission
10-Speed Automatic (AWR10L65)
- Harsh or Erratic Shifting
- Description/Symptoms: Abrupt shifts, hesitation when accelerating, difficulty finding the correct gear, especially at lower speeds.
- Solution: Software reflash of the transmission control module (TCM) is the first step. If the problem persists, a valve body replacement or transmission replacement may be required.
- Estimated Cost to Fix: $150 - $300 (reflash), $1,500 - $3,000+ (valve body), $5,000 - $8,000+ (transmission replacement)
- Recalls: None Found
- Delayed Engagement
- Description/Symptoms: A noticeable delay between shifting gears, especially between Park and Drive or Reverse. Can also happen while driving in automatic mode.
- Solution: Check transmission fluid level and condition. A software reflash of the TCM is the first step. If the problem persists, a valve body replacement or transmission replacement may be required.
- Estimated Cost to Fix: $150 - $300 (reflash), $1,500 - $3,000+ (valve body), $5,000 - $8,000+ (transmission replacement)
- Recalls: None Found
Suspension
- Air Suspension Compressor Failure (If Equipped)
- Description/Symptoms: Vehicle sagging, especially overnight, failure to maintain ride height, “Check Air Suspension” warning light. Compressor may run constantly or fail to activate.
- Solution: Replacement of the air suspension compressor. Check for leaks in the air lines or air struts.
- Estimated Cost to Fix: $1,200 - $2,500+ (parts and labor)
- Recalls: None Found
- Air Strut Leaks (If Equipped)
- Description/Symptoms: Hissing sound near the wheel wells, vehicle sagging on one side, uneven ride height.
- Solution: Replacement of the leaking air strut(s). It is recommended to replace them in pairs.
- Estimated Cost to Fix: $1,500 - $3,000+ per strut (parts and labor)
- Recalls: None Found
Electrical
- Infotainment System Freezing/Crashing
- Description/Symptoms: The infotainment screen freezes, becomes unresponsive, or reboots randomly.
- Solution: Software update. If that doesn’t work, the head unit may need to be replaced.
- Estimated Cost to Fix: $0 (software update), $1,000 - $2,500+ (head unit replacement)
- Recalls: None Found
- Navigation System Errors
- Description/Symptoms: Inaccurate GPS location, difficulty acquiring a signal, outdated maps.
- Solution: Update the navigation software and map data. Ensure the GPS antenna is properly connected.
- Estimated Cost to Fix: $150-$300 (Software Update), $200-$500+ (Antenna Replacement)
- Recalls: None Found
- Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
- Description/Symptoms: False alarms, system not activating, error messages.
- Solution: Diagnose the specific sensor causing the issue and replace it.
- Estimated Cost to Fix: $300 - $800+ per sensor (parts and labor)
- Recalls: None Found
Exterior
- Automatic Trunk Malfunction
- Description/Symptoms: Trunk not opening or closing automatically, getting stuck halfway, or making unusual noises.
- Solution: Check and replace the trunk lift motor, struts, or sensors.
- Estimated Cost to Fix: $500 - $1,500+ (parts and labor)
- Recalls: None Found
Interior
- Sunroof Issues
- Description/Symptoms: Sunroof not opening or closing properly, getting stuck, or making grinding noises.
- Solution: Lubricate the sunroof tracks and inspect for obstructions. If the problem persists, replace the sunroof motor or rails.
- Estimated Cost to Fix: $100 - $300 (lubrication/adjustment), $500 - $1,500+ (motor/rail replacement)
- Recalls: None Found
- Power Seat Malfunctions
- Description/Symptoms: Seat not adjusting in one or more directions, getting stuck, or making unusual noises.
- Solution: Inspect the seat motor, gears, and tracks. Replace faulty components as needed.
- Estimated Cost to Fix: $300 - $1,000+ (parts and labor)
- Recalls: None Found
Summary
The 2018 Lexus LS 500 is a generally reliable luxury sedan, but like all vehicles, it has potential issues. The most concerning relate to the turbochargers and the 10-speed transmission, which can be expensive to repair. The air suspension, while providing a comfortable ride, can also be a source of costly repairs. Electrical gremlins with the infotainment system and sensors are also common complaints. Overall, while the LS 500 offers a luxurious and comfortable driving experience, potential buyers should be aware of these potential issues and factor them into their purchasing decision. Pre-purchase inspections by a qualified mechanic are highly recommended, especially focusing on the turbochargers, transmission, and air suspension system if equipped.