30

Engines
1.8L and 2.0L TFSI engines
Technical feature overview

Cylinder head with Integrated Exhaust Manifold (IEM)

2.0L TFSI engine shown. The 1.8L TFSI engine
does not have continuously adjustable exhaust
camshaft timing.

Optimized thermal management

Engine Temperature Control Actuator

31

Both the 1.8L TFSI and 2.0L TFSI engines for the North
American market will only have the FSI injection system.
The dual injection may be introduced at a later date.

Combined FSI/MPI injection

Friction optimization and lightweight design

609_156

625_107
32

Diesel engines
2.0l Second generation TDI engine
Technical features

Cylinder block with integrated balancer shafts

609_041

Oxidizing catalytic converter and diesel particulate filter

609_042

Cylinder head with variable valve timing

609_043

33

Oil pump with integral vacuum pump

609_044

Active coolant pump

609_045

Intake manifold module with integrated charge air cooler

609_017

609_046

34

Engine/transmission combinations
1.8l TFSI engine

0CW

2.0l TFSI engine

0D9

2.0l TDI engine

0CW

Transmission designations:
0AH

Explanation of manufacturer designation:
Example: MQ350-6F

(MQ200_5F)

0AJ

(MQ200_6F)

M

Manual transmission

02S

(MQ250_6F)

D

Dual clutch transmission

02Q

(MQ350_6F)

Q

Transverse installation

0FB

(MQ350_6A)

350

Nominal torque capacity

0CW

(DQ200_7F)

6

Number of gears

0D9

(DQ250_6A)

F

Front wheel drive

A

All-wheel drive (quattro)

35

Notes

36

Power transmission
Overview
The drive train components of the 2015 A3 are based on
proven technology and include the new 5th generation
Haldex coupling on quattro models.

Rear axle drive 0CQ
Final drive

Rear axle
drive vent

Haldex coupling vent

All Wheel Drive Control Module

Haldex Clutch Pump
Haldex coupling

609_129
37

Parking lock emergency release mechanism
The parking lock emergency release mechanism can be
accessed by unclipping the selector lever gate from the
center console and pushing the insulating foam to the side.

Emergency release
mechanism
609_140

Selector mechanism with emergency release.

12°

Selector lever cable for actuating
the parking lock

0D9 transmission

609_131

38

5th generation Haldex coupling
Component overview
The most notable feature of the 5th generation Haldex
coupling is a new pressure control system. The hydraulic
pressure required for the Haldex coupling is produced by a
pump with centrifugal governor. The new Haldex coupling
is 3.7 lb (1.7 kg) lighter than the 4th generation coupling.

An electric motor drives a six axial piston pump. The pistons
are pushed against an inclined thrust plate. When the
pump cylinder rotates, the pistons execute an axial stroke
and move the Haldex oil to the pressure side of the pump.

Axial needle bearing

Clutch cage
Thrust plate

Thrust plate

Clutch plate assembly

Axial needle bearing

Working piston with seals

Axial piston pump with integrated centrifugal governor
Centrifugal lever

Pressure side

Haldex coupling pump

Axial piston

Thrust plate

Haldex Clutch Pump
Suction side

Pump sump

Centrifugal force
control valve

609_132
39

Pump cylinder

Needle bearing

2-way connector

Drive hub
All Wheel Drive Control Module

8-way connector

Oil sleeve

Housing

Pressure relief valve

Ball bearing
Snap ring
Ring seal

O-ring

Flange

Flanged nut

609_134
40

Running gear
Design concept
A design goal for running gear of the A3 sedan was to have a
finely balanced axle load distribution of 59% front to 41%
rear. The forward placement of the front axle in relation to
the body played a significant role in this accomplishment.
The use of the same components across the worldwide A3
model line-up was also of major consideration.

The application of the Audi ultra lightweight strategy was
also addressed by the use of aluminum axle components
and smaller wheel offsets.

Overview
ABS/ESP from Continental
TPMS standard

15“ or 16” inch brakes standard. 17“ inch brakes
for S3 sedan

Tandem master brake cylinder with
single 10” or 11” diaphragm power
brake booster. (Engine dependent)

Distance Regulation Control
Module when optional ACC
installed

Electro-mechanical steering is standard equipment. Dynamic steering to be offered at a later
date.

41

MacPherson strut front axle in combination
with aluminum sub frame and steering
knuckle.

Four spoke steering wheel is standard. Different four
spoke and three spoke steering wheels available
depending on model and optional equipment selected

16” through 19” wheels available depending on model and options

15” brakes standard. 17” brakes standard for S3
EFB is standard equipment.

Four-link rear suspension is standard on all North
American region vehicles except those with the
2.0L TDI engine. (Delayed introduction.)

625_145

42

Suspension variations

625_147

Dynamic suspension

The Dynamic suspension is standard equipment for the 2015 A3 sedan.

Sport suspension

The sports suspension is optional. In models with sports suspension, ride height is 0.59 in (15 mm)
lower than in models with the standard suspension.

S line suspension

The ride height is lowered .98 in (25 mm) compared to the standard suspension. The tuning is more
sporty than the Sport suspension. The S line suspension comes with 18 inch wheels as standard.

Suspension system with
electronic damping control

This suspension system is available only on S3 models. It is based on the Audi magnetic ride system
currently used in other Audi models.

Tire Pressure Monitoring System
The 2015 Audi A3 uses the second generation tire pressure
monitoring system. It functions based on information from
the ABS/ESP control module. It is identical to the system
currently in use on other Audi models in terms of design,
operation, driver information provided, service operations
and diagnostics.

625_148
43

Wheels and tires
Depending on equipment package, 16 and 17 inch wheels
are used in the standard trim. The 17 and 18 inch wheels
are optional.

A.

B.

E.

F.

The range of tires extends from the 205/60 R16 to the
225/40 R18. The "Tire Mobility System" is standard equipment; a minispare wheel is optional.

C.

D.

E.
A3

Wheels & Tires

Code
C0X

A. 7.5J x 17 5-spoke-Star-design
225/45 R17 all-season tires

H7K

B. 7.5J x 17 10-spoke Dynamic-design
225/45 R17 all-season tires

H7K

C. 8.0J x 18 10-spoke-Design, Audi exclusive
225/40 R18 all-season tires
225/40 R18 summer performance tires
D. 8.0J x 19 5-arm-Wing-design, Anthracite
polished 235/35 R19 summer
performance tires
E. 8.0J x 18 5-arm double spoke S3 design
225/40 R18 summer performance tires
225/40 R18 all-season tires
F. 8.0J x 19 5-parallel spoke Cast Aluminum design
225/35 R19 summer performance tires

C5I

S3

Package

1.8T

2.0T

2.0TDI

——





——

——

——

——

——



——

——

o

o

o

——

——

o

o

——

——

——

——

——

——



——

——

——

——

o

CL7
HX9
HJ4
C7D
H13
C0J
HJ4
HX9
C6H
H13

= Standard
= Optional
= Not Available

1 Tires are supplied and warranted by their manufacturer. High-performance tires are designed for optimum performance and handling in warm
climates. They are not suitable for cold, snowy, or icy weather conditions. If you drive under those circumstances, you should equip your vehicle
with all-season or winter tires, which offer better traction under those conditions. We suggest you use the recommended winter or all-season
tire specified for your car or its equivalent. These high-performance tires also have a lower aspect ratio that aids performance and handling;
however, in order to avoid tire, rim or vehicle damage, it is important that the inflation pressure is regularly checked and maintained at optimum
levels. Please also remember in making your selection that, while these tires deliver responsive handling, they may ride less comfortably and
make more noise than other choices. Finally, these tires may wear more quickly than other choices.

44

Electrical system
Audi drive select
The 2015 A3 is equipped with Audi drive select. At model
introduction, the engine/transmission, power steering and
Adaptive cruise control can be tailored to the driver through
the Audi drive select feature. The driver can choose
between three operating modes: comfort, auto and
dynamic. In addition, the vehicle set-up can be customer
configured using individual mode. More vehicle systems
will be added to the Audi drive select at a later date.

Depending on the infotainment system installed, Audi drive
select can be configured either using the button in the
instrument panel or via the Car menu in the MMI.
The selected mode of the system is indicated in the MMI
display. Individual mode is only available with infotainment
versions MMI Navigation and MMI Navigation with Audi
connect.

Functional features:

•
•
•
•

The mode previously selected is active when the vehicle
restarts.
The individual mode settings are automatically assigned
to the vehicle key in use.
The mode can be changed when the vehicle is stationary
or while driving (requirement: terminal 15 "on").
To activate a selected mode for the Transmission/engine,
the accelerator pedal must briefly return to the idle
position.

Controllable systems at the 2015 A3 model introduction

Steering

adaptive cruise control

Variable
characteristic

Variable
steering torque

Variable
longitudinal acceleration

drive select

Automatic transmission

Operation by central
operating switch

Variable shift program

Accessible via Car menu;
select with
turn-push button

45

Accelerator/engine

Functional characteristics

comfort
Selector lever
position

D

auto
S

D

dynamic
S

D

S

Engine
Power/torque

normal