check engine Acura MDX HYBRID 2018 Owner's Guide
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574
uuMaintenance Under the Hood uAdding Engine Oil
Maintenance
Adding Engine Oil
1. Unscrew and remove the engine oil fill cap.
2. Add oil slowly.
3. Reinstall the engine oil fill cap, and tighten 
it securely.
4. Wait for three minutes and recheck the 
engine oil dipstick.1Adding Engine Oil
NOTICE
Do not fill the engine  oil above the upper mark. 
Overfilling the engine oil  can result in leaks and 
engine damage.
If any oil spills, wipe it away immediately. Spilled oil 
may damage the engine  compartment components.
Engine Oil Fill Cap
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uuMaintenance Under the Hood uChanging the Engine Oil and Oil Filter
576
Maintenance
4. Remove the oil filter and dispose of the 
remaining oil.
5. Check that the filter ga sket is not stuck to 
the engine contact surface.
u If it is stuck, you must detach it.
6. Wipe away dirt and dust adhering to the 
contact surface of the engine block, and 
install a new oil filter.
u Apply a light coat of new engine oil to 
the filter gasket.
7. Put a new washer on the drain bolt, then 
reinstall the drain bolt.
u Tightening torque:
29 lbf∙ft (39 N∙m, 4.0 kgf∙m)
8. Pour the recommended engine oil into the 
engine.
u Engine oil change capacity (including 
filter):
4.5 US qt (4.3 L)
9. Reinstall the engine oil fill cap securely and 
start the engine.
10. Run the engine for a few minutes, and   
then check that there is no leak from the   
drain bolt or oil filter.
11. Stop the engine, wait for three minutes,   
and then check the oil level on the   
dipstick.
u If necessary, add more engine oil.1Changing the Engine Oil and Oil Filter
You will need a special wrench to replace the oil 
filter. You can buy this wrench from a dealer.
When installing the new oil filter, follow the 
instructions supplied with the oil filter.
Reinstall the engine oil fill  cap. Start the engine. The 
low oil pressure indicator should go off within five 
seconds. If it does not, turn  off the engine, and check 
your work.
Oil Filter
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577
uuMaintenance Under the Hood uCooling System
Continued
Maintenance
Cooling System
This coolant is premixed with 50% an tifreeze and 50% water. Do not add any 
straight antifreeze or water.
We recommend you check the engine coolant  level every time you refuel. Check the 
reserve tank first. If it is completely  empty, also check the coolant level in the 
radiator. Add the engine coolant accordingly.
1. Make sure the engine and radiator are cool.
2. Check the amount of coolant in the reserve 
tank.
u If the coolant level is below the  MIN 
mark, add the specified coolant until it 
reaches the  MAX mark.
2Engine Compartment Cover  P. 571
3.Inspect the cooling system for leaks.
Specified coolant: Acura Long  Life Antifreeze/Coolant Type 2
■Reserve Tank
1Cooling System
NOTICE
Genuine Acura engine cool ant is a 50/50 mixture of 
antifreeze and water that can withstand freezing at 
temperatures as low as a bout –31°F (–35°C). If your 
vehicle is consistently subjected to temperatures 
below this, the concentration of antifreeze in the 
coolant should be increased. Consult a dealer for 
details.
If Acura antifreeze/coolant  is not available, you may 
use another major brand of non-silicate coolant as a 
temporary replacement. Check that it is a high quality 
coolant recommended for  aluminum engines. 
Continued use of any non-Acur a coolant can result in 
corrosion, causing the cooling system to malfunction 
or fail. Have the cooling  system flushed and refilled 
with Acura antifreeze/cool ant as soon as possible.
Do not add rust inhibitors  or other additives to your 
vehicle’s cooling system. They may not be compatible 
with the coolant or with the engine components.
3WARNING
Removing the radiator cap while the 
engine is hot can cause the coolant to spray 
out, seriously scalding you.
Always let the engine and radiator cool 
down before removing  the radiator cap.
MAXMIN
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579
uuMaintenance Under the Hood uInverter Coolant
Maintenance
Inverter Coolant
This coolant is premixed with 50% an tifreeze and 50% water. Do not add any 
straight antifreeze or water.
We recommend you check the  inverter coolant level every time you refuel. Check 
the filler tank. Add the inve rter coolant accordingly.
Have a dealer replace the inverter coolant.
1.Check the fluid level in the tank.
2. If the coolant level has dropped below the 
MIN  level, have your ve hicle serviced at a 
dealer.
u Only a properly trained technician can 
refill the coolant and check the system 
for leaks.
Specified coolant: Ac ura Long Life Antifreeze/Coolant Type 2
■Checking the Coolant
1Inverter Coolant
NOTICE
Genuine Acura engine cool ant is a 50/50 mixture of 
antifreeze and water that can withstand freezing at 
temperatures as low as a bout –31°F (–35°C). If your 
vehicle is consistently subjected to temperatures 
below this, the concentration of antifreeze in the 
coolant should be increased. Consult a dealer for 
details.
If Acura antifreeze/coolant  is not available, you may 
use another major brand of non-silicate coolant as a 
temporary replacement. Check that it is a high quality 
coolant recommended for  aluminum engines. 
Continued use of any non-Acur a coolant can result in 
corrosion, causing the cooling system to malfunction 
or fail. Have the cooling  system flushed and refilled 
with Acura antifreeze/cool ant as soon as possible.
Do not add rust inhibitors  or other additives to your 
vehicle’s coolant system. They may not be compatible 
with the coolant or with the motor components.
MAX
MIN
Filler Tank
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581
uuMaintenance Under the Hood uBrake Fluid
Maintenance
Brake Fluid
The fluid level should be between the  MIN 
and  MAX  marks on the side of the reserve 
tank.
Refilling Window Washer Fluid
If the washer fluid is low,  a message appears on the MID.
Pour the washer fluid carefully.  Do not overflow the reservoir.
Specified fluid: Acura Heavy Duty Brake Fluid DOT 3
■Checking the Brake Fluid
1Brake Fluid
NOTICE
Brake fluid marked DOT 5 is  not compatible with your 
vehicle’s braking system  and can cause extensive 
damage.
If the specified brake fluid is not available, you should 
use only DOT 3 or DOT 4 fluid from a sealed 
container as a temporary replacement.
Using any non-Acura brake fl uid can cause corrosion 
and decrease the longevity of the system. Have the 
brake system flushed and re filled with Acura Heavy 
Duty Brake Fluid DOT 3 as soon as possible.
If the brake fluid level is at or below the MIN  mark, 
have a dealer inspect the vehicle for leaks or worn 
brake pads as soon as possible.
Brake Reserve Tank
MIN
MAX
1 Refilling Window Washer Fluid
NOTICE
Do not use engine antifreeze or a vinegar/water 
solution in the windshield washer reservoir.
Antifreeze can damage y our vehicle’s paint. A 
vinegar/water solution ca n damage the windshield 
washer pump.
Use only commercially avai lable windshield washer 
fluid.
Avoid prolonged use of hard  water to prevent lime 
scale build up.
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611
Maintenance
Accessories and Modifications
Accessories
When installing accessories, check the following:
• Do not install accessories on the windsh ield. They can obstruct your view and 
delay your reaction to driving conditions.
• Do not install any accessories over areas  marked SRS Airbag, on the sides or backs 
of the front seats, on front or side pillars, or near the side windows.
Accessories installed in these areas may  interfere with proper operation of the 
vehicle’s airbags or may be propelled into you or another occupant if the airbags 
deploy.
• Be sure electronic accessories do not overload  electrical circuits or interfere with 
proper operation of your vehicle.
2 Fuses  P. 647
•Before installing any electro nic accessory, have the installer contact a dealer for 
assistance. If possible, have a deal er inspect the final installation.
1Accessories and Modifications
Acura Genuine accessori es are recommended to 
ensure proper operati on on your vehicle.
3WARNING
Improper accessories or modifications can 
affect your vehicle’s handling, stability, and 
performance, and cause a crash in which 
you can be seriously hurt or killed.
Follow all instruction s in this owner’s 
manual regarding  accessories and 
modifications.
3WARNING
Use of improperly designed, engineered or 
manufactured high-voltage battery 
assemblies could cause a fire in your 
vehicle.
A vehicle fire could result in a crash or 
injury.
Only use a genuine Acura high-voltage 
battery assembly, or it s equivalent, in your 
vehicle.
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uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire*
630
Handling the Unexpected
• Greater than 25 psi (175 kPa), but less 
than 35 psi (240 kPa):
Turn the air compressor on to inflate the 
tire until the tire pressure reaches 35 psi 
(240 kPa).
2 Inflating an Under-inflated Tire  P. 631
Then drive carefully for 10 more minutes or 
until you reach the nearest service station, 
whichever is sooner. Do not exceed 50 mph 
(80 km/h). If you have not reached a service 
station, stop and check the tire pressure.
u You should repeat this procedure as long 
as the air pressure is  within this range.
7. Unscrew the sealant/ai r hose from the tire 
valve stem.
Reinstall the valve cap.
8. Press the pressure relief button until the 
gauge returns to 0 psi (0 kPa).
9. Repackage and properly stow the kit.
Pressure Relief Button
1Distributing the Sealant in the Tire
3WARNING
Running the engine with the vehicle in an 
enclosed or even partly enclosed area can 
cause a rapid build-up of toxic carbon 
monoxide.
Breathing this colorless, odorless gas can 
cause unconsciousness and even death. 
Only run the engine  to power the air 
compressor with th e vehicle outdoors.
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637Continued
Handling the Unexpected
Jump Starting
Turn off the power to electric devices, such as audio and lights. Turn off the power 
system, then open the hood. 1.Pull up on the engine cover, remove it from 
the pins.
u Start on the passenger side and lift up on 
the outermost edge of the cover.
u Move towards the driver side while 
applying uniform upward pressure.
2. Connect the first jumper cable to your 
vehicle’s 12-volt battery  + terminal.
3. Connect the other end of the first jumper 
cable to the booster battery  + terminal.
u Use a 12-volt booster battery only.
u When using an automotive battery 
charger to boost your 12-volt battery, 
select a lower charging voltage than 15 
volt. Check the charger manual for the 
proper setting.
4. Connect the second jumper cable to the 
booster battery -  terminal.
■Jump Starting Procedure1Jump Starting
Securely attach the jumper cables clips so that they 
do not come off when the e ngine vibrates. Also be 
careful not to tangle the ju mper cables or allow the 
cable ends to touch each other while attaching or 
detaching the jumper cables.
12-volt Battery performa nce degrades in cold 
conditions and may prevent  the engine from starting.
3WARNING
A 12-volt battery can explode if you do not 
follow the correct procedure, seriously 
injuring anyone nearby.
Keep all sparks, open flames, and smoking 
materials away from the 12-volt battery.
Engine 
CoverPin
Booster Battery
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638
uuJump Starting u
Handling the Unexpected
5.Connect the other end of the second 
jumper cable to the engine hanger as 
shown. Do not connect this jumper cable to 
any other part.
6. If your vehicle is connected to another 
vehicle, start the assisting vehicle’s engine 
and increase its rpm slightly.
7. Attempt to start your vehicle’s engine. If it 
turns over slowly, check that the jumper 
cables have good metal-to-metal contact.
Once your vehicle’s engine has started, re move the jumper cables in the following 
order.
1. Disconnect the jumper cable from your vehicle’s ground.
2. Disconnect the other end of the jumper cable from the booster battery  - 
terminal.
3. Disconnect the jumper cable from your vehicle’s 12-volt battery  + terminal.
4. Disconnect the other end of the jumper cable from the booster battery  + 
terminal.
Have your vehicle inspected by a n earby service station or a dealer.
■What to Do After the Engine Starts
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uuOverheating uHow to Handle Overheating
640
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and 
turn the power system off once the high 
temperature indicator goes off.
u If the cooling fan is not operating, 
immediately turn the power system off.
2. Once the engine has cooled down, inspect 
the coolant level an d check the cooling 
system components for leaks.
u If the coolant level in the reserve tank is 
low, add coolant until it reaches the 
MAX  mark.
u If there is no coolan t in the reserve tank, 
check that the radiator is cool. Cover the 
radiator cap with a heavy cloth and open 
the cap. If necessary, add coolant up to 
the base of the filler neck, and put the 
cap back on.
■Last thing to do
Once the engine has cooled sufficiently, turn the power system on, and check the 
high temperature indicator.
If the high temperature indicator is off, resu me driving. If it stay on, contact a dealer 
for repairs.
1 How to Handle Overheating
If the coolant is leaking, contact a dealer for repairs.
Use water as an emergency/temporary measure only. 
Have a dealer flush the system with proper antifreeze 
as soon as possible.
Continuing to drive with the  Stop Driving When 
Safe. Engine Temperature Too Hot  message on 
the multi-information display may damage the 
engine.
3WARNING
Removing the radiator cap while the 
engine is hot can cause the coolant to spray 
out, seriously scalding you.
Always let the engine and radiator cool 
down before removing  the radiator cap.
Reserve TankMAXMIN
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