2020 Lexus RX 450hL Service and Repair Manual

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2020 Lexus RX 450hL service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications, torque values, and reference data
  • Electrical diagnostics with full wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
  • Diagnostic trouble codes and troubleshooting flow
  • Maintenance schedules and fluid capacities

Trims covered

  • Base

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Maintenance & Lubrication
  • Specifications
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Diagnostic Trouble Codes
  • Technical Service Bulletins
  • Wiring Diagrams
No active recalls The 2020 Lexus RX 450hL has no recalls on file with NHTSA.
No service bulletins No technical service bulletins on file with NHTSA for the 2020 Lexus RX 450hL.
06/01/20Component: ELECTRICAL SYSTEMCrash reported2 injured

The contact owned a 2020 Lexus RX350. The contact stated that while making a left turn into a parking lot at approximately 10 MPH, the vehicle suddenly accelerated on its own and crashed into the side of a Walmart shopping store. The air bags deployed upon impact. The contact and her sister were both taken by ambulance to two separate hospitals. The contact was treated for fractures to her right hand and wrist; screws were placed in her right wrist and another was placed in between her index and middle right finger. The contact had additional X-rays performed on the right of her body where she

02/18/20Component: ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEMCrash reported1 injured

Contact states they were sitting in DRIVE, with their foot on the brake. When the contact took their foot off the brake, they began to let the vehicle coast to about 5 MPH. Then, the vehicle lunged forward unexpectedly to about 25 MPH, when it collided with a rock. The vehicle had previously spent over 10 days in different dealerships to diagnose issues related to the engine running rough, the car stalling out, and the vehicle driving erratically and lunging forward. The contact only began to have issues with the vehicle after the NHTSA Denso Fuel Pump Recall. A year after the contact took

01/29/20Component: UNKNOWN OR OTHER1 injured

SUNROOF EXPLODED WHILE DRIVING WHILE MY HUSBAND WAS DRIVING WITH A FRIEND. DEALERSHIP IS NOT ACKKNOWLEDGING IT SINCE THERE IS NOT A RECALL SO I WILL HAVE TO CALL LEXUS CORPORATE. I AM TAKING IT INTO THE DEALERSHIP TO BE FIXED AND DROPPING IT OFF THIS FRIDAY. INSURANCE ADJUSTER WILL BE DOING TO DEALERSHIP TO LOOK AT SINCE IT COSTS $2000 TO FIX AND I HAVE A $1000 DEDUCTIBLE :( :( NO WARNING JUST SOUNDED LIKE A BOMB OR GUNSHOT GOING OFF. MY HUSBAND HAS HAD RINGING IN THE EARS SINCE IT WAS SO LOAD AND RIGHT ABOVE HIS HEAD!!!!

02/16/20Component: AIR BAGS,FORWARD COLLISION AVOIDANCECrash reported

I am submitting this correspondence to formally report a serious safety incident involving my 2020 Lexus RX 350 and to request a thorough investigation. On Saturday, February 7, while attempting to park the vehicle, I experienced a sudden loss of control, resulting in the vehicle accelerating forward and colliding with a metal gate. The exact cause of this event is unknown. During the incident, the vehicle’s pre-collision and automatic braking system failed to engage despite an obstruction being present. Additionally, the airbags did not deploy at the time of impact. A minor child was present

05/21/20Component: AIR BAGSCrash reported

The contact owns a 2020 Lexus RX. The contact stated while his wife and children were stopped in traffic, a vehicle had crashed into the rear of the contact's vehicle, which then caused a five-car chain reaction crash. The contact stated that none of the air bags had deployed. The contact stated that the rear end of his vehicle was crushed as well as the front end. The contact stated that the police and emergency services had arrived on the scene. The contact stated that his wife and son were transported to the hospital. The contact stated that his wife had suffered neck whiplash, cuts, and ab

09/11/20Component: AIR BAGS,FORWARD COLLISION AVOIDANCECrash reported

Just after topping a hill on an Interstate Highway, both lanes of traffic ahead of us came to a sudden and complete stop. I was in left lane and reacted quickly and applied full braking power and managed to stop a foot or 2 from the rear of the stopped car ahead of us. A few seconds later we were hit from the rear by two cars, one, a Black late model Camry, which almost stopped and a 2nd, a large, new German-maker grey SUV, which never applied brakes, destroyed the black Camry behind us and then destroyed our car, when it hit the left rear and after impact continued pushing the front of the c

08/22/20Component: VEHICLE SPEED CONTROL,ENGINECrash reported

Was driving into the garage (coasting) very slowly and as I was preparing to step on brake the car revved forward unsuspectedly - I have a video on my ring door bell and you can hear the engine then the squealing of the automatic braking system. I destroyed the adult 3 wheel bicycle that was stored along the wall but that helped the vehicle from crashing through the bricks - I remember shouting “what the hell is happening”. After much research as I knew I did not depress the accelerator in error - I found that this has been a common occurrence with Toyota and Lexus products. I am a very car

05/27/20Component: ENGINE,FUEL/PROPULSION SYSTEM

While driving the engine stalls. It has jolted back-and-forth at times and had to be taken to a dealer. It’s still stalls when trying to slowly accelerate especially uphills. Low gas mileage barely getting 18 miles per gallon. Warning lights flickering while car stallling. It’s like it’s having a seizure. This has happened a few times.

Showing the 8 most serious of 42 complaints filed with NHTSA.

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