
1503-2. Opening, closing and locking the doors and trunk
GS450h_300h_OM_OM30F92E_(EE)
WARNING
■Using the trunk 
Observe the following precautions. Failure to do so may cause parts of the body  to be caught, resulting in serious injury.
●Remove any heavy loads, such as snow and ice, from the trunk lid before opening it. Failure to do so may cause the trunk lid to  suddenly shut again after it is opened.
●When opening or closing the trunk lid, thoroughly check to make sure the surround- 
ing area is safe. 
●If anyone is in the vicinity, make sure they are safe and let them know that the trunk is about to open or close.
●Use caution when opening or closing the tr unk lid in windy weather as it may move abruptly in strong wind.
●Do not attach any accessories other than genuine Lexus parts to the trunk lid. Suchadditional weight on the trunk lid may cause  the lid to suddenly shut again after it is 
opened. 
●The trunk lid may suddenly shut if it is not opened fully. It is more difficult to open orclose the trunk lid on an  incline than on a level 
surface, so beware of the trunk lid unexpect- edly opening or closin g by itself. Make sure that the trunk lid is fully open and secure 
before using the trunk. 
●When closing the trunk lid, take extra care to prevent your fingers etc. from being caught.
●When closing the trunk lid, make sure topress it lightly on its outer surface. If the trunkgrip is used to fully close the trunk lid, it may 
result in hands or arms being caught.  

2104-1. Before driving 
GS450h_300h_OM_OM30F92E_(EE)
Trailer towing (vehicles with towing package)
◆Weight limits 
Check the allowable towing capacity, GVM (Gross Vehicle Mass), MPAC 
(Maximum Permissible Axle Capacity), and permissible drawbar load before 
towing. ( P. 546)
◆Towing hitch/bracket 
Lexus recommends the use of the Lexus hitch/bracket for your vehicle. Other 
products of a suitable nature and comparable quality may also be used.
Your vehicle is designed primaril y as a passenger carrying vehicle. 
Towing a trailer will have an adverse  effect on handling, performance, brak- 
ing, durability, and fuel consumption.  Your safety and satisfaction depend on 
the proper use of correct equipment  and cautious driving habits. For your 
safety and the safety of others, do not overload the vehicle or trailer. 
To tow a trailer safely, use extreme care and drive the vehicle in accordance 
with the trailer’s characteristics and operating conditions. 
Lexus warranties do not apply to damage or malfunction caused by towing a 
trailer for commercial purposes. 
Ask your local authorized Lexus retailer or Lexus authorized repairer, or any 
reliable repairer for further details before  towing, as there are additional legal 
requirements in some countries. 

2114-1. Before driving
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Total trailer weight and permissible drawbar load 
Total trailer weight
Weight of the trailer itself plus the trailer load should be within the max- 
imum towing capacity. Exceeding this weight is dangerous. ( P. 546) 
When towing a trailer, use a friction 
coupler or friction stabilizer (sway control device).
Permissible drawbar load
Allocate the trailer load so that the drawbar load is greater than 25 kg (55.1 lb.) or4% of the towing capacity. Do not let the drawbar load exceed the indicatedweight. ( P. 546)
■Information tag (manufacturer’s label) 
Gross vehicle mass
The combined weight of the driver, passengers, towing hitch, luggage, 
total curb mass and drawbar load should not exceed the gross vehiclemass by more than 100 kg (220.5 
lb.). Exceeding this weight is danger- ous.
Maximum permissible rear axle capacity
The weight borne by the rear axle should not exceed the maximum permissibleaxle capacity by 15% or more. Exceeding this weight is dangerous. 
The values for towing capacity were derived from testing conducted at sea level. 
Take note that engine output and towing  capacity will be reduced at high altitudes.
Important points regarding trailer loads
1
2
1
WARNING
■When the gross vehicle mass limit or maximum permissible axle capacity is exceeded 
Do not exceed the established speed limit fo r towing a trailer in built-up areas or 100 km/h (62 mph), whichever is lower. 
Failing to observe this precaution may lead  to an accident causing death or serious injury.
2 

2134-1. Before driving
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Tire information
●Increase the tire inflation pressure to 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi) greater than the recommended value when towing. ( P. 555)
●Increase the air pressure of the trailer tires in accordance with the total trailer weight 
and according to the values recommended by the manufacturer of your trailer.
■Trailer lights
●Please consult any authorized Lexus retailer  or Lexus authorized repairer, or any reli- 
able repairer when installing trailer lights,  as incorrect installation may cause damage to the vehicle’s lights. Please take care to comply with your state’s laws when installingtrailer lights.
●Check that the turn signal lights and stoplights are operating correctly every time youhitch up the trailer. Directly wiring up to your vehicle may damage the electrical systemand stop the lights from  functioning correctly.
■Break-in schedule 
Lexus recommends that vehicles fitted with new power train components should not be used for towing trailers for  the first 800 km (500 miles).
■Safety checks before towing
●Check that the maximum load limit for the towing hitch/bracket and hitch ball is not exceeded. Bear in mind that  the coupling weight of the trailer will add to the load 
exerted on the vehicle. Also make sure that the total load exerted on the vehicle is within the range of the weight limits. ( P. 211)
●Ensure that the trailer load is secure.
●Supplementary outside rear view mirrors should be added to the vehicle if the traffic behind cannot be clearly seen with standard mirrors. Adjust the extending arms ofthese mirrors on both sides of the vehicle so that they always provide maximum visibility 
of the road behind.
■Maintenance
●Maintenance must be performed more frequently when using the vehicle for towing
due to the greater weight burden placed on the vehicle compared to normal driving.
●Retighten all bolts securing the hitching ball and bracket after towing for approximately 1000 km (600 miles).
NOTICE
■When the rear bumper strengthening material is aluminum 
Ensure the steel bracket part does not come directly in contact with that area. When steel and aluminum come into contact, there is a reaction similar to corrosion,which will weaken the section concerned and  may result in damage. Apply a rust inhib- 
itor to parts that will come in co ntact when attaching a steel bracket. 

2154-1. Before driving
4
Driving
GS450h_300h_OM_OM30F92E_(EE)
■Passing other vehicles 
Consider the total combined length of your vehicle and trailer and ensure that 
the vehicle-to-vehicle distance is sufficient before executing lane changes.
■Transmission information 
To maintain engine braking efficiency,  when using engine braking, when driv- 
ing on a long steep downgrade, do  not use the transmission in D. (P. 227)
■If the engine overheats 
Towing a loaded trailer up a long, steep incline in temperatures exceeding 
30 C (85F) may result in the engine overheating. If the engine coolant tem- 
perature gauge indicates that the engine is overheating, turn the air condition- 
ing off immediately, leave the road and stop the vehicle in a safe place.  
( P. 535)
■When parking the vehicle 
Always place wheel chocks under the wheels of both the vehicle and trailer. 
Firmly set the parking brake and shift the shift lever to P.
WARNING
Follow all the instructions described in this se ction. Failure to do so could cause an acci- dent resulting in death or serious injury.
■Trailer towing precautions 
When towing, make sure that none of the weight limits are exceeded. ( P. 211)
■To avoid accident or injury
●Do not tow a trailer when the compact spare tire is installed on your vehicle.
●Do not tow a trailer when the tire installed is repaired with the emergency tire punc- ture repair kit.
●Do not use cruise control (if equipped) or dynamic radar cruise control with full- 
speed range (if equipped) when trailer towing.
■Vehicle speed in towing 
Observe the legal maximum speeds for trailer towing.
■Before descending hills or long declines
Reduce speed and downshift. However, never downshift suddenly while descending steep or long downhill grades.
■Operation of the brake pedal 
Do not hold the brake pedal depressed  often or for long periods of time.  
Doing so may result in the brake ov erheating or reduce braking effects. 

429
6 
 6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
Tire inflation pressure
■Effects of incorrect tire inflation pressure 
Driving with incorrect tire inflation  pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drive train 
If a tire needs frequent inflating, have it  checked by any authorized Lexus retailer or 
Lexus authorized repairer, or any reliable repairer.
■Instructions for checking tire inflation pressure 
When checking tire inflation pressure, observe the following:
●Check only when the tires are cold. If your vehicle has been parked for at least 3 hours or has not been driven for more than1.5 km or 1 mile, you will get an accurate cold tire inflation pressure reading.
●Always use a tire pressure gauge.It is difficult to judge if a tire is prop erly inflated based only on its appearance.
●It is normal for the tire inflation pressure to be higher after driving as heat is generated 
in the tire. Do not reduce tire inflation pressure after driving.
●Passengers and luggage weight should be placed so that the vehicle is balanced.
Make sure to maintain proper tire inflation pressure. Tire inflation pressure 
should be checked at least once pe r month. However, Lexus recommends 
that tire inflation pressure be  checked once every two weeks. (P. 555)
WARNING
■Proper inflation is critical to save tire performance 
Keep your tires properly inflated. 
If the tires are not properly inflated, the following conditions may occur which could lead to an accident resulting in death or serious injury:
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from overheated tires
●Air leaking from between tire and wheel
●Wheel deformation and/or tire damage
●Greater possibility of tire damage while driving (due to road hazards, expansion 
joints, sharp edges in the road, etc.) 

431
6 
 6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
Wheels
When replacing wheels, care should be taken to ensure that they are equivalent 
to those removed in load capacity, diameter, rim width and inset*. 
Replacement wheels are available at any authorized Lexus retailer or Lexus 
authorized repairer, or any reliable repairer.
*: Conventionally referred to as “offset”.
Lexus does not recommend using the following:
●Wheels of different sizes or types
●Used wheels
●Bent wheels that have been straightened
●Steel wheels (except for vehicles with steel spare wheel)
●Use only Lexus wheel nuts and wrenches designed for use with your alumi- 
num wheels.
●When rotating, repairing or changing your tires, check that the wheel nuts are 
still tight after driving 1600 km (1000 miles).
●Be careful not to damage the aluminum wheels when using tire chains.
●Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels.
■When replacing wheels (vehicles with the tire pressure warning system) 
The wheels of your vehicle are equipped with tire pressure warning valves and transmit- ters that allow the tire pressure warning sy stem to provide advance warning in the event of a loss in tire inflation pressure. Whenever wheels are replaced, tire pressure warning 
valves and transmitters  must be installed. (P. 418)
If a wheel is bent, cracked or heavily corroded, it should be replaced. Other- 
wise, the tire may separate from the wheel or cause a loss of handling control.
Wheel selection
Aluminum wheel precautions 

5468-1. Specifications 
GS450h_300h_OM_OM30F92E_(EE)
Maintenance data (fuel, oil level, etc.)
*1: Unladen vehicle
*2: Vehicles with 265/35R19 tires
*3: AWL10L-BEXEHW and AWL10R-BEXEHW models*10
*4: AWL10L-BEXQHW and AWL10R-BEXQHW models*10
*5: GWL10L-BEXEBW and GWL10R-BEXEBW models*10
*6: GWL10L-BEXQBW and GWL10R-BEXQBW models*10
*7: Vehicles with towing package
*8:GS300h
*9:GS450h
*10: The model code is indicated on  the manufacturer’s label. (P. 547)
Dimensions and weights
Overall length 4850 mm (190.9 in.)
Overall width 1840 mm (72.4 in.)
Overall height*11455 mm (57.3 in.) 
Wheelbase 2850 mm (112.2 in.)
Tread*1Front 1575 mm (62.0 in.)
Rear 1590 mm (62.6 in.) 1560 mm (61.4 in.)*2
Gross vehicle mass 
2235 kg (4927 lb.)*3
2265 kg (4993 lb.)*4
2305 kg (5082 lb.)*5
2335 kg (5148 lb.)*6
Maximum  permissible axle  
capacity
Front 1120 kg (2469 lb.)
Rear 1270 kg (2800 lb.)
Drawbar load*780 kg (176 lb.)
Towing capacity*7
With brake 500 kg (1102 lb.)*8
1500 kg (3307 lb.)*9
Without brake0 kg (0 lb.)*8
750 kg (1653 lb.)*9