lb-ft @ 4800 rpm
hp @ 6400 rpm
hp per liter
(from Lexus Press
Release) Lexus Offers IS Convertible – A Stylish Coupe with
• Convertible Top
Provides Cool Breeze or Refuge in Less Than 21 Seconds
• Sedan-like Noise, Vibration, Harshness Characteristics in a
• Available F Sport Performance Accessories
The sophisticated Lexus
IS 250C and IS 350C continues to blend the expressive stylishness of
a hardtop convertible with the quietness and comfort of a coupe.
Young at heart customers appreciate the IS convertible’s ability to
quickly go from hardtop to convertible in less than 21 seconds. A
fun-in-the-sun driving experience is enhanced with numerous standard
and optional features including new 18-inch 5-spoke wheels with
Liquid Graphite finish, leather-trimmed seating, heated and
ventilated front seats and F Sport performance accessories. As it
enters the 2012 model year its sporty style is complemented with the
addition of a Nebula Gray Pearl exterior as it replaces Smoky
The IS convertible
models feature the same powertrains as the IS sedans. The IS 350C's
3.5-liter V6 delivers exhilarating performance with outstanding 306
horsepower at 6,400 rpm along with 277 lb.-ft. of torque at 4,800
rpm. The IS 250C's 2.5-liter V6 engine has a great combination of
fuel efficiency and performance. The IS 250C’s V6 produces 204
horsepower at 6,400 rpm and 185 lb.-ft. of peak torque at 4,800 rpm.
Both engines utilize aluminum cylinder blocks and heads, while
employing dual Variable Valve Timing with intelligence (VVT-i),
which controls timing on both the intake and exhaust camshafts.
A direct-type fuel-injection system provides a cooling effect in the
cylinders, enabling the high compression needed to extract maximum
energy from the fuel. Aside from its larger displacement, the
3.5-liter V6 differs chiefly in that it augments the direct fuel
injection with port fuel injectors. In light- and medium-load
conditions, these additional injectors help produce a precise burn,
increasing power and efficiency, while reducing emissions. A dual
exhaust system reduces backpressure at higher engine speeds. Both
the IS 250C and IS 350C meet the Ultra-Low Emission Vehicle II (ULEV
An advanced six-speed automatic transmission with
steering-wheel-mounted paddle shifters is standard on the IS 350C.
The IS 250C comes with either a six-speed manual transmission or the
paddle-shift, six-speed automatic transmission.
three-piece hardtop provides open-air freedom with the top down
through the operation of a convenient single switch. Constructed
primarily of lightweight aluminum, the hardtop also provides
surprising storage space but with low noise and increased security
not typically found in soft-top convertibles. In addition, the top
completely retracts with no elements remaining in view.
The four-link roof assembly, also made of aluminum for a lightweight
design, provides smooth, even movement. Engineered to operate in an
easy, efficient manner, each component is motor driven with
detection switches, allowing the control unit to know their exact
position at all times. In addition to the two main roof panels being
constructed of light-weight aluminum, the back window’s reinforced
glass construction also lends itself to reduced weight.
Weather-strip changes in areas around the doors and windows ensure
A roof-speed brake-control system decreases the roof speed
especially as it approaches the end of the closing operation in
either direction, ensuring an elegant and quiet movement. On models
equipped with available Intuitive Park Assist (IPA), sonar sensors
in the rear bumper will stop the movement of the luggage door at the
start of operation if it detects an obstacle will interfere. Also, a
visual warning will appear on the instrument panel if a detected
obstacle may soon interfere with top operation.
When the IS convertible’s top is opened or closed, the power windows
will automatically lower if in the closed position, and raise back
up when the operating switch is held. Also, when the top is up, the
door windows automatically lower 15 mm when the door opens, and then
raise back into a fully closed position when the door closes. This
ensures the doors’ clean open/close function while also maintaining
a tight seal around the glass. The aluminum hardtop features an
automatic front lock assembly that provides the interior security
not found in soft-top convertibles. When the top is stowed in the
down position in the rear of the IS convertible, the lock assembly
is engaged to keep the panel in a fixed, stable position.
The IS convertible’s body structure has excellent rigidity and
strength, achieved by effective structural changes and additions to
the existing IS sedan platform. Areas that received modifications or
additions include the rocker area; A and B pillar under structure;
side collision crossmember, and upper and rear-floor crossmembers.
In addition, underfloor braces were added both in the front and the
rear. Additional bracing was implemented to help provide excellent
handling control, ride comfort and body durability while also
minimizing weight gain.
The transformation to a convertible also required reevaluation of
noise, vibration and harshness (NVH) characteristics in order to
meet Lexus standards. All body and chassis revisions went through
extensive testing to ensure that the IS 250C and IS 350C have nearly
identical NVH characteristics to the IS sedans. High-rigidity
damping materials and asphalt sheets were added to help minimize
vibration effects. Redesigned rear-suspension-mount bushings help
reduce noise and vibration associated with the changes in body
characteristics from a sedan to a convertible. Additional sound
absorption and insulation materials were optimally positioned to
create a quiet, comfortable cabin.
The IS convertible features two wheels. Standard 17-inch wheels
utilize two multi-layered five-spoke patterns for a contemporary
10-spoke design with a clean liquid-graphite finish. Optional
18-inch wheels with all-season tires have an athletic five-spoke
design with a liquid-graphite finish. Both feature the tire pressure
monitor system found on the sedan models.
The IS 250C and IS 350C provide a consistent blend of driving
performance and comfort in either convertible or coupe
configuration. They share common double-wishbone front and
multi-link rear suspension systems with the IS sport sedan models.
Engineers tuned and optimized specific features for the convertible
including the double-wishbone front suspension for handling control
and ride comfort; the torsional rigidity of the suspension bushings,
the spring constant on the coil springs, and the shock absorber
damping force; the stabilizer shape and the Electric Power Steering
(EPS) gear ratio for control; the suspension bushings, coil springs
and shock-damping force of the multi-link rear suspension; and a
lowered rear-suspension tower with enhanced rigidity to help provide
rear control, linear yaw response and improved trunk space.
Standard Vehicle Dynamics Integrated Management System (VDIM)
governs all of the vehicle’s dynamic handling systems – the
Anti-lock Braking System (ABS), Brake Assist (BA), Vehicle Stability
Control (VSC) and Traction Control (TRAC) – employing them
collectively and seamlessly to make corrections while helping
provide higher dynamic capability. VDIM also interfaces with the
electronic throttle control system. The IS convertible features
large, ventilated four-wheel disc brakes with ABS, Electronic Brake
force Distribution (EBD) and BA. The IS 350C is equipped with
13.2-inch front and 12.2-inch rear rotors with aluminum four-piston
front calipers to aid in heat dissipation and stopping power and
reduce unsprung weight. The IS 250C has 11.7-inch front and
12.2-inch rear rotors.
Lexus Safety and Security
technology begins with a number of body-structure changes integrated
in the IS 250C and IS 350C to help augment strength and torsional
rigidity. Seatbelt pre-tensioners and force limiters are used for
the front seats, while the rear seats adopt emergency locking
retractor seatbelts with an automatic locking retractor.
In addition to the dual-front airbags, the Lexus Supplemental
Restraint System (SRS) for the IS convertible includes
front-seat-mounted head and torso side airbags, and knee airbags for
both the driver and the front passenger. The front-passenger airbag
features two chambers, creating an indentation in the center impact
The IS convertible
emphasizes easy access and rear-seat comfort. In addition to front
doors that are 11.8 inches longer than the IS sedans, two convenient
fold-forward lock-release levers are standard on both sides of the
front passenger seats, making it easier to operate from any location
inside the vehicle. The passenger seat features a power slide button
on the top of the seatback to ease rear seat ingress/egress. An
available automatic one-touch, easy-entry power-seat mechanism
provides even easier egress and ingress through quick-acting,
front-seat fold-and-slide activation. The two passenger doors also
have three open-stopping positions (rather than the normal two) to
add convenience in various parking situations. The IS convertible
also is equipped with a standard power tilt and telescoping steering
column to help the driver quickly get into a comfortable position.
The IS convertible’s air conditioning system automatically adjusts
for the outside temperature when the top is lowered, improving
interior temperature consistency and comfort. The system adjusts the
air outlets, temperature and air flow exiting the outlets. The
airflow volume adjusts to outside temperature and vehicle speed,
while the temperature control adjusts to outside temperature, amount
of sunlight and vehicle speed. The system also includes a pollen
filter and variable-control compressor.
The standard SmartAccess keyless entry and push-button-start/stop
allows the driver to keep the access key fob in a pocket or purse.
The standard HomeLink® programmable garage door opener also operates
home security devices and other systems.
Models equipped with an automatic transmission have standard
Hill-start Assist Control (HAC). HAC helps prevent the vehicle from
moving backward when the driver moves their foot from brake pedal to
The standard Lexus Premium Audio System features a six-disc, in-dash
CD changer, eight speakers, integrated SiriusXM Satellite Radio
receiver (complimentary 90-day trial subscription included),
Bluetooth® hands free phone capability and music streaming, and
USB/iPod® connectivity. An equalizer system maintains the same
acoustic field when the top is either open or closed, compensating
for the natural loss of bass sounds when open. When connected to the
USB port, the iPod can be controlled through the audio system or
steering wheel controls, while information such as names for the
artist, track and album is displayed on the headunit or navigation
Lexus’ Hard-Disk Drive (HDD)
navigation system is available on the IS convertible and is complete
with a seven-inch VGA touch-screen, and back-up camera. The
navigation system also includes Voice Command casual-language voice
recognition system. With Voice Command users avoid having to speak
commands in a specific order. The Voice Command system also works to
control many functions of the audio system, heating and air
conditioning, and the navigation system.
Like all Lexus models, the IS convertible offers a Mark Levinson®
Premium Surround Sound Audio system which is available in
conjunction with the optional navigation system. This 12-speaker
audio system features discrete 5.1 multi-channel playback with
5.1-channel speaker architecture. Its nine amplifier channels
provide 270 watts total output at 0.1 percent total harmonic
distortion (THD). From 20-20,000Hz, the Mark Levinson system plays
conventional CDs and specially encoded DVD audio and DVD video
discs, plus MP3/WMA-formatted CD-R/RW and DVD-R/RW. DVD movies can
be viewed on the optional navigation system's color touch screen
when the parking brake is engaged.
Optional Bi-Xenon HID headlamps with LED daytime running lamps (DRLs)
are also available. The HID headlamps produce a whiter light and
have a longer reach and wider distribution than conventional
headlamps to help drivers see more clearly. LED DRLs help make the
vehicle more visible.
The optional Intuitive Park Assist (IPA) system uses ultrasonic
sensors to detect objects close to the car's front and rear bumpers,
alerting the driver and showing distance to objects in the
multi-information display within the speedometer. When equipped with
the optional navigation system, the area behind the vehicle is shown
in greater detail on the navigation screen via the backup camera.
The optional Pre-Collision System (PCS) is packaged with Dynamic
Radar Cruise Control, which uses millimeter-wave radar to measure
and help maintain a set distance from a vehicle traveling ahead. PCS
relies on the radar sensor to detect obstacles in front of the car,
and a PCS computer with sensor inputs from vehicle speed, steering
angle and yaw rate is designed to determine whether a collision is
unavoidable. In such a situation, PCS alerts the driver via sound
and visual warnings while preemptively retracting front seat belts
and pre-initializing BA so that increased braking will be applied
the instant the driver depresses the pedal.
The IS convertible also offers a telematics system, Lexus Enform®
with Safety Connect®, available by subscription. Safety Connect is
standard on all vehicles while Lexus Enform with Safety Connect is
on all vehicles equipped with the optional Navigation system.
Complimentary one-year trial subscriptions are included on all
purchases of new Lexus vehicles equipped with these features. The
Lexus Enform and the Safety Connect response centers operate 24
hours a day, 7 days a week—every day of the year.
Lexus Enform vehicles are factory ready for subscriptions to a
variety of innovative SiriusXM services including NavTraffic,
NavWeather, Sports, and Stocks. SiriusXM services offer
complimentary 90-day trial subscriptions and require separate
F Sport Performance Accessories
Available for IS Convertible
The IS convertible F
Sport Performance Accessories include performance enhancing parts
such as 19-inch forged alloy wheels, brake upgrades, suspension
systems, air intake, exhaust systems and more.
F Sport Performance Accessories by Lexus U.S.A. are engineered by
Toyota Racing Development (TRD). When installed by an authorized
dealer, the accessories are fully warranted for 12 months or for the
balance of the new car warranty, whichever is greater.
The IS 250C and IS
350C’s exterior design has its lineage in the IS sedan but possesses
its own dynamic styling, including unique characteristics when
interchanging between convertible and coupe configurations. With the
exception of the hood, all other body panels have been specifically
designed to blend seamlessly with the three-panel folding roof.
The convex shoulder lines distinguish the convertible’s profile,
while the top-up configuration provides a sweeping cabin silhouette.
With the top down, the belt-line draws up around the rear deck lid,
providing a muscular look.
In the front, hood lines flow into a unique chrome grille shape,
then continue down into an air inlet before flowing outward past the
more distinctive elliptical fog lamp design.
The rear view features a clean, continuous design, with flowing
bumper corners and a strong bumper shape that flows inward towards
the exhaust. The combination taillamp clusters feature LED lights
and two distinct horizontal lines that emphasize breadth, while the
LED brake light integrated within the standard rear spoiler imparts
a sporty impression.
The IS convertible has a best-in-class 0.29 drag coefficient (Cd).
This is accomplished with the help of underbody covers below the
engine (with aerodynamic steps), the full floor, and fuel-tank
covers, as well as a rear-floor diffuser with vertical fin and
airfoil. Other areas that contribute to the low Cd include the
design shape of the outer mirrors, high-mount stop lamps, and the
rear taillamps. Fender fairings before the front and rear tires
reduce airflow into the wheel house, improving aero characteristics
and reducing air turbulence.
The IS convertible
interior maintains the luxury touch points associated with the IS
sport sedans, while additional comfort and entertainment features
provide a consistent atmosphere regardless of top configuration.
Special attention was given to providing an attractive interior
design when viewing the convertible externally. The door and side
trim is fashioned to create continuity and continuous flow from
front to back.
A four-seat configuration provides each passenger with their own
comfort space, and the rear-seat console enhances the rear-passenger
amenities with cup holders and storage. Soft padding on the sides of
the console and the outer trim areas improve comfort. The rear
headrests are retractable for improved visibility and the lever
located on the front of the rear console can easily be accessed from
the driver’s seat. Rear-seat comfort is enhanced by shifting seat
position inboard, providing for sizeable headroom.
Ten-way adjustable power front seats, including power lumbar support
are standard, and the available heated/ventilated function has a
heating range that includes the shoulder areas and increases airflow
in ventilation function. Front-seat backs are scaled inward, and
slim, leather-trimmed seat-back pockets help to maximize rear-seat
The gauge cluster is similar to that of the IS sedan, but there are
some additions on the IS convertible for style and function. The
convertible features a high-contrast multi-information LCD and
decreased surface-glass transmittance for enhance visibility when
the top is down. The multi-information display includes status of
the hardtop while in transformation, providing a bar graph showing
its progress. It also shows a warning to inform the driver if the
roof is not completely open/closed, a rear obstacle may impede
proper open/close operation, or the open/close function is not
available while the vehicle is in motion. Metallic trim around the
two main gauges contribute to a premium look.
All new Lexus vehicles
come with a 48-month/50,000-mile basic limited warranty with
roadside assistance for 48 months/unlimited miles. Powertrain and
restraint system coverage is provided for 72 months/70,000 miles.
Corrosion perforation protection is covered for 72 months,
regardless of mileage.