2021 AUDI Q5 catalytic converter

80B012721BA
Checking and Filling

Checking and Filling
Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
The individual gasoline grades are differentiated
by octane ratings. This value is given with (R
+M)/2 equating to AKI or in RON.
The headings below match the sticker in the fuel
filler door (examples):
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular / MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI /
91 RON > ©.
Audi recommends using premium gasoline with
minimum 91 AKI/ 95 RON to achieve the rated
horsepower and torque.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 91 / SUPER MIN. RON 95
Using premium gasoline with minimum 91 AKI /
95 RON is recommended.
If premium gasoline is not available, you can also
use regular gasoline 87 AKI / 91 RON. However
this does reduce the engine power slightly.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 93 / SUPER PLUS MIN. RON 98
Using premium plus gasoline with at least 93
AKI / 98 RON is recommended.
If no premium plus gasoline is available, you can
also use premium gasoline with 91 AKI /95 RON.
However this does reduce the engine power
slightly.
CG) Note
— Filling the tank just one time with leaded
fuel or other metallic additives will cause
permanent deterioration to the catalytic
converter function.
— When gasoline with an octane rating that is
too low is used, high speeds or heavy engine
load can lead to engine damage.
@ Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine.
Gasoline mixture
Gasoline with alcohol or MTBE (Methyl-Tert-
Butyl-Ether)
You can use unleaded gasoline mixed with alco-
hol or MTBE (generally labeled as oxygenated
compounds) as long as the fuel meets the follow-
ing conditions:
Gasoline with methanol content (methyl alco-
hol or methanol)
— Anti-Knock Index is at least 87 AKI
—No more than 3% methanol
— More than 2% solvent
Gasoline with ethanol content (ethyl alcohol or
ethanol)
— Anti-Knock Index is at least 87 AKI
—No more than 15% ethanol
Gasoline with MTBE content
— Anti-Knock Index is at least 87 AKI
—No more than 15% MTBE
Gasoline adapted to the season
Many gasoline fuels are adapted to the seasons.
When the season changes, refueling at high-traf-
fic gas stations is recommended. It is more likely
that the gasoline will be suitable for the season
there.
@) Note
— Gasoline with methanol content that does
not meet the specified conditions may cause >
241

Checking and Filling


out of the container and ignite, especially dur-
ing an accident. This can cause explosions,
fires, and injuries.
— If you must transport fuel in a fuel contain-
er, note the following:
— Always place the fuel container on the
ground before filling. Never fill the fuel
container with fuel while it is inside or on
the vehicle. Electrostatic discharge can oc-
cur while refueling and the fuel vapors
could ignite.
— When using fuel containers made of met-
al, the fuel pump nozzle must always re-
main in contact with the container to re-
duce the risk of static charge.
— Insert the fuel pump nozzle as far as pos-
sible into the filler opening while refuel-
ing.
— Follow the applicable legal regulations in
the country where you are driving when
using, storing and transporting fuel con-
tainers.
— Make sure that the fuel container meets
the industry standards, for example ANSI
or ASTM F852-86.

©) Note
— Remove fuel that has overflowed onto any
vehicle components immediately to reduce
the risk of damage to the vehicle.
— Never drive until the fuel tank is completely
empty. The irregular supply of fuel that re-
sults from that can cause engine misfires.
Uncombusted fuel may enter the exhaust
system and increase the risk of damage to
the catalytic converter.
@) For the sake of the environment
— Do not overfill the fuel tank, or fuel could
leak out when the vehicle is warming up.
— Fuel should never enter the sewer system or
come into contact with the ground.
@) Tips
The fuel filler door on your vehicle does not
lock if you lock the vehicle from the inside us-
ing
the central locking switch.
244
G) Tips
Applies to: vehicles with plug-in hybrid drive
— When inserting the fuel pump nozzle, make
sure that you do not press on the fuel filler
door opener @) with the fuel pump nozzle.
See the label in the fuel filler door @)
> fig. 166. Otherwise, a valve will close in
the fuel filler neck and fueling will stop even
if the tank is not full.
— You must vent the tank system again if you
press on the fuel filler door opener. The fuel
pump nozzle can stay in the fuel filler neck
when doing this. Vent the tank system by
pulling the EQ) switch in the driver's door
again.
— If the engine turned off because the fuel
level was too low, then you may need to re-
fuel with up to 4.0 gallons (15 liters) of fuel
in order for the vehicle to detect the new
fuel level. Otherwise, the engine may not
restart.
— Fuel can age and may lead to problems
when starting. Audi recommends replacing
the fuel in your vehicle within six months.

80B012721BA

Checking and Filling

Fuel filler door emergency release

Applies to: vehicles with manual fuel filler door release
If the central locking system malfunctions, the
fuel filler door can be unlocked manually.
BFY-0028
Fig. 167 Right side trim panel in the luggage compart-
ment: opening the trim panel



Fig. 168 Luggage compartment: fuel filler door emergency
release
The emergency opening mechanism is located
behind the right side trim panel in the luggage
compartment.
> Open the cover in the side panel > fig. 167.
> To unlock the fuel filler door, loosen the red
loop from the retainer and then pull on the
loop carefully > fig. 168 >©.
> Press on the left side of the fuel filler door to
open it > page 243, fig. 165.
@) Note
Only pull on the loop until you feel resistance.
You
will not hear it release. If you continue to
pull, you could damage the emergency re-
lease mechanism.
iG) Tips
Applies to: vehicles with plug-in hybrid drive
— The tank will not be vented if the emergency
release function was used on the fuel filler
door. You can only fill a small amount of
fuel in the tank. Fill only until the fuel pump
nozzle turns off for the first time. Drive to
an authorized Audi dealer or authorized
Audi Service Facility immediately to have
the malfunction corrected.
— Pressure can escape if you open the tank cap
after using the emergency release. This can
create noises.
Emissions control
system
General information
Z\ WARNING
The temperature of the exhaust system is
high, both when driving and after stopping
the engine.
— Never touch the exhaust tail pipes once they
have become hot. This could result in burns.
— Do not park your vehicle over flammable
materials such as grass or leaves because
the high temperature of the emissions sys-
tem could start a fire.
— Do not apply underbody protectant in the
exhaust system area, because this increases
the risk of fire.
Catalytic converter
Observe the safety precautions > page 245, Gen-
eral information.



The vehicle may only be driven with unleaded
gasoline, or the catalytic converter will be de-
stroyed.
Never drive until the tank is completely empty.
The irregular supply of fuel that results from that
can cause engine misfires. Uncombusted fuel
could enter the exhaust system, which could
cause overheating and damage to the catalytic
converter.
245

Checking and Filling

Malfunction Indicator Lamp (MIL)
If the S indicator light blinks or turns on, there
is a malfunction that is causing poor emissions
quality and that could damage the catalytic con-
verter. Drive slowly to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction corrected.
The indicator light can also turn on if the fuel fill-
er cap is not closed correctly > page 2431).
Motor compartment
General information
Special care is required if you are working in the
motor compartment
For work in the motor compartment, such as
checking and filling fluids, there is a risk of in-
jury, scalding, accidents, and burns. For this
reason, follow all the warnings and general
safety precautions provided in the following in-
formation. The engine/motor compartment is a
dangerous area in the vehicle. > A\.
Explanation of warnings (sticker in the motor
compartment):

Hot motor components!
@ Rotating parts!

The radiator fan can switch on at any
a time!

High voltage! Switch off the engine be-
5 fore coming into contact with any igni-
tion system components!



Applies to: vehicles with plug-in hybrid
drive: High voltage! The voltage in the
high-voltage system is high enough to
cause fatal injuries. Touching a damaged
high-voltage component can result ina
fatal electric shock.


The catalytic converter can be damaged

Always follow the instructions in the op-
erating manual.

"127i if the oil level is too high!


D_ Depending on the engine and country
246

ZA WARNING
— Turn the engine off.
— Switch the ignition off.
— Set the parking brake.
— Select the “P” (Park) selector lever position.
— Allow the engine to cool.
— Keep children away from the motor com-
partment.
— Never spill fluids on a hot engine. These flu-
ids (such as the freeze protection contained
in the coolant) can catch fire.
— Avoid short circuits in the electrical system.
— Never reach into the radiator fan. The fan is
temperature-controlled and can turn on
suddenly, even when the ignition is switched
off.
— Never open the hood when there is steam or
coolant escaping from the motor compart-
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
— Plug-in hybrid drive: The coolant expansion
tank cap is equipped with a seal that must
never be removed under any circumstances
=> page 249, fig. 171. If the coolant expan-
sion tank for the high-voltage system is not
sealed, please contact an authorized Audi
dealer or authorized Audi Service Facility.
— Plug-in hybrid drive: The sealed cap must
only be opened by an authorized Audi dealer
or authorized Audi Service Facility.
— The cap on the coolant expansion tank must
never be opened when the coolant is hot.
The cooling system is under pressure. There
is a risk of burns
—To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
thick cloth when opening.
— Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
— Due to the risk of electric shock, never touch
the ignition cable or other components in
the electronic high-voltage ignition system
when the engine is running or is starting.

Checking and Filling

may add a maximum of 1 quart (1 liter) of
ACEA C3 or API SN engine oil one time until the
next oil change.
For more information on the correct engine oil
for your vehicle, contact an authorized Audi deal-
er or authorized Audi Service Facility. Have the oil
changed by an authorized Audi dealer or author-
ized Service Facility.
@ Tips
Audi recommends using engine oils provided
by Audi Genuine Parts.
Messages
Ei Turn off engine. Oil pressure too low
Stop driving and switch the engine off. Check the
engine oil level > page 250.
— If the engine oil level is too low, add engine oil
=> page 251. Only continue driving once the in-
dicator light turns off.
—If the engine oil level is correct and the indica-
tor light still turns on, turn the engine off and
do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance.
Applies to: vehicles with oil level warning
2 Please add oil immediately.
Stop driving and switch the engine off. Check the
engine oil level > page 250 and add engine oil
immediately > page 251.
E& Add max. x qt (x 0) oil. You can continue
driving
Add the amount of oil shown immediately
=> page 251.
Es Please reduce oil level
There is too much oil in the engine and there is a
risk of damaging the catalytic converter or en-
gine. Drive to an authorized Audi dealer or au-
thorized Audi Service Facility immediately to have
engine oil extracted if necessary. Avoid high en-
gine speeds, full acceleration, and heavy engine
loads.
250
BB Oil level sensor: oil change necessary. Please
contact Service
Fuel has entered the engine oil. This will cause
the engine oil level to rise slowly and the engine
oil quality to decrease. Do not extract engine oil
to reduce the level, because this will increase the
risk of engine damage. Drive to an authorized
Audi dealer or authorized Audi Service Facility im-
mediately to have engine oil extracted.
==.) Oil level system: malfunction! Please con-
tact Service
The sensor that checks the engine oil level has
malfunctioned. Drive immediately to an author-
ized Audi dealer or authorized Audi Service Facili-
ty to have the malfunction repaired.
& Oil pressure sensor: malfunction! Please
contact Service
The sensor that checks the engine oil pressure
has malfunctioned. Drive immediately to an au-
thorized Audi dealer or authorized Audi Service
Facility to have the malfunction repaired.
FI Please drive to warm up engine
Fuel has entered the engine oil, either due to low
outside temperatures or frequent short drives.
Drive until the engine is warm so that the fuel in
the engine oil will evaporate. Avoid high engine
speeds, full accelerating, and heavy engine loads
when doing this.
Gi) Tips
The oil pressure warning BB is not an oil level
indicator. Always check the oil level regularly.
Checking the engine oil level
The engine oil level can be checked in the MMI.
Observe the safety precautions > /A\ in General
information on page 246.
> Park the vehicle on a level surface.
>» Shut the engine off when it is warm.
> Switch only the ignition back on.
> Wait approximately two minutes.
» Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Oil level.

Fuses and bulbs

@) Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Facili-
ty.
G@) Tips
— The following table does not list fuse loca-
tions that are not used.
— Some of the equipment listed in the follow-
ing tables applies only to certain model ver-
sions or certain optional equipment.

Fig. 198 Driver's footwell (left-hand drive vehicle): fuse
panel with plastic clip
300
3 2
= & a

a
Ss $
2 8

Fig. 199 Front passenger's footwell (right-hand drive vehi-
cle): fuse panel with plastic clip

Fuse panel


No. | Equipment

Catalytic converter heating

2 |Engine components

Exhaust doors, fuel injectors, radiator in-
let, crankcase housing heating

Vacuum pump, hot water pump, NOx sen-
4 |sor, particulate sensor, biodiesel sensor,
exhaust doors

Brake light sensor

6 | Engine valves, camshaft adjustment

Heated oxygen sensors, mass airflow sen-
sor, water pump

Water pump, high pressure pump, high
8 | pressure regulator valve, temperature
valve, engine mount

Hot water pump, motor relay, 48 V drive-
train generator, 48 V water pump

10 | Oil pressure sensor, oil temperature sensor

Clutch position sensor, 48 V drivetrain
11 | generator, water pump, 12 V drivetrain
generator

12 | Engine valves, engine mount


13 | Engine cooling

Index

B
Bag hooks .......... 0... c eee eee eee ee 83
Band
refer to Frequency band............... 217
Battery
Charging (12 Volt vehicle battery)....... 258
High-voltage battery...............0.. 122
Vehicle battery (12 Volt)............0.8. 256
Winter operation (12 Volt vehicle battery) . 257
Battery (vehicle)
refer to High-voltage battery........... 122
BLOCK FOULS caus + & eau o » Rees ov REwW 3 eR 211
BlOWEP's = sours = © egups 3 ¥ saws 7 e Seon ze pees ze 93
Bluetooth
‘Audio player « sii 3 6 wes ao nese ee wenn o 225
Connecting adevice...............00-. 238
Connecting a mobile phone............ 186
Deleting
adevice................0000- 239
Device overview... . 6... 00. eee eee eee 238
Disconnecting a device................ 238
Displaying Profiles « caves x « xayre a 2 waurs a « 239
Selecting adevice.................00. 238
Specifying a favorite.............0000- 239
Boost... 2... cece 16
Boost function.................000000. 102
Boost pressure indicator................. 16
Brake fluid
Checking the brake fluid level........... 255
Brakes... 2... eee 109
Brake tluidis « « mays ¢ gave © saan ¢ 8 meres F 255
Emergency braking function............ 112
HOt. cece eee eee eee 112
New brake pads..............----000-- 110
Brands............2..02. 000 e cece ee 240
Break-in security feature..............00- 37
Breaking in
New brake pads..............---000-- 110
New tires’: « + soe « + cagme 5 2 eeuwe oe ae oo 268
Browser
refer to Mediacenter.................. 228
Business. addressii. : viii 6 < aes eo soaom oo 211,
Cc
California Proposition 65 Warning........ 247
Battery specific.................-000. 257
CALGUISE & cciwass so cusetie oo examen sa avawans & @ wesw a 190
Cameras
Coverage areaS.... 6... eee eee eee 142
LOGALIONS ccm s 2 wom « § aoe 5s REE 3s eee 143
Capacities
Fuel tant. so wesc oo seems o wand ov sae 2 2 313
Washer fluid reservoir.............0005 313
Carg@Plembiscns x x cscacn wx rans we re oe Moa 88
Cat KO Ybiwiue © sveveware o seam @ 6 anccoms a 8 asuwone ww vomeT 38
Gar WaShiy 2 aicscs ss swcna © & swam wo orem © oe 282
Catalytic converter.............--00000- 245
Cell phone
refer to Telephone............00eee eae 186
Cell phone compartment
refer to Audi phone box............... 188
Central lockingeins «+ ccs + 2 ances 0 comsens « & ose 34
Auto Lock... 0... cece eee eee eee eee 34
Convenience key...... 0... eseee eevee 39
Convenience opening and closing......... 46
Luggage compartment lid.............0. 42
Mechanically unlocking and locking....... 37
Messages « anise «seas 3 3 mara @ wavimin © wave 36
Remote control key.............--.00-- 39
SECUG: o x sure x = swe & a eR Fe ee 2 5 ee 35
Vehicle key sais xs cers se namie 6 ceri wo rete 39
Central locking switch.............000005 36
COrtifiCatienins « « waws « « eews 4 e cows 9 o eee 311
Charging
refer to Power sourceS..............00-- 82
Charging clip
referto Wall mount clip............... 136
Charging display ccc. «eves ao eases oo oes x 127,
Charging the battery
Mobile devices. ..........00 cece eee 226
USB... eee 188
Wirelessi: = » aeons « 2 waves x 5 wayne 4 & Haus 8 = 189
GharGiniG titties: « sass = 2 neue x = neem & o weer 2 123
Child safety lock
Climate control system controls in the rear. 44
Power windows............00000e eee ee 44
Rear dOGrsion x s anan ¢ a ecwe i Kamen ¢ BORE Ee 44
Child safety seats........ 0... cece eee eee 76
Securing to the top tether anchor........ 80
Securing with a safety belt.............. 79
Securing with LATCH.............000005 78
Cleaning... 0... . cece eee 282
Cleaning artificial leather............... 285
Cleaning carbon components........ 284, 285