& 3.5 liter V6
& 277 lb-ft
& 306 hp
& 87.4 hp per liter
(from Lexus Press
Release) Lexus IS Retractable Hard-Top Convertible Offers
Top-Down Expressiveness with Coupe-Inspired Styling
· Convertible Top
Opens and Closes In Less Than 21 Seconds
· Optional Intuitive Park Assist Stops Top Operation If Rear
Obstacle Is Detected
· Noise, Vibration, Harness Characteristics Nearly Identical to
The all-new 2010 Lexus
IS 350C and IS 250C hard-top convertibles give Lexus a coupe and
convertible in the entry luxury segment for the first time. The IS C
models combine the expressiveness of a convertible with the athletic
styling of a coupe.
Sophisticated Retractable Hardtop
The IS250C and IS350C
represent Lexus’ second convertible and its first since the debut of
the SC430 in 2001. Featuring a convenient single-switch operation,
the new three-piece hard top provides open-air freedom with the top
down without sacrificing the quiet and comfort of a coupe.
Constructed primarily of lightweight aluminum, the hard top 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 hard top 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 kept the panel in a fixed, stable position.
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 tailamps. Fender
fairings before the front and rear tires reduce airflow into the
wheel house, improving aero characteristics and reducing air
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.
Convertible Body Rigidity
The IS convertible’s
body structure has excellent rigidity and strength, achieved by
effective structural changes and additions to the existing IS sedan
platform. Additional bracing was implemented to help provide
excellent handling control, ride comfort and body durability while
also minimizing weight gain.
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.
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 have gone
through extensive testing to ensure that the IS250C and IS350C have
nearly identical NVH characteristics as the IS sedans. High-rigidity
damping materials and asphalt sheets have been 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 have been optimally
positioned to create a quiet, comfortable cabin.
The IS250C and IS350C’s
new 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 redesigned to
blend seamlessly with the new 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. All-new combination tail-lamp 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 features two new wheels unique from the IS sedan
line up. 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 have an athletic
five-spoke design with asymmetrical changes in shape and a
liquid-graphite finish. Both feature the tire-pressure warning
system found on the sedan models. In addition to standard all-season
tires, an optional 18-inch wheel with run-flat tire is available
without a spare, adding to the available luggage space.
Five colors common with the IS sedan are available on the
convertible, Ultrasonic Blue Mica is shared with the ISF, and
Cerulean Blue Metallic is new to the Lexus exterior color selection
for 2010. Like the sedans, additional wet sanding is applied in
mid-coat application to provide a premium finish.
Unique Interior Look
The IS convertible
interior maintains the luxury touch points associated with the IS
sport sedans, while new 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
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
increased heating range to include the shoulder areas and increases
airflow in ventilation function. Front-seat backs are scaled inward,
and slim, leather 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. A
higher-contrast multi-information LCD, dial-color change for more
contrast, and decreased surface-glass transmittance all enhance
visibility when the top is down. The multi-information display also
includes status of the hardtop while in transformation, providing a
bar graph showing its progress. It also displays a warning to inform
the driver if the roof is not completely open/closed, a rear
obstacle may impede proper open/close operation, or if the
open/close function is not available while the vehicle is in motion.
Metallic trim around the two main gauges contribute to a premium
The interior adopts recycled materials in 13 various areas including
door and side trim. The IS convertible has three interior trim color
options, including two new color combinations. In addition to black
leather interior, a new alabaster color is joined by a distinctive
alabaster/blue contrast trim.
Dynamic Driving Performance
The IS250C and IS350C
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.
The double-wishbone front suspension received a number of changes to
provide the handling control and ride comfort required for a
convertible. The torsional rigidity of the suspension bushings was
optimized, as was the spring constant on the coil springs, and the
shock absorber damping force. The stabilizer shape and the Electric
Power Steering (EPS) gear ratio were also revised to help provide
The multi-link rear suspension also received similar changes to
suspension bushings, coil springs and shock-damping force. In
addition, the rear-suspension tower was lowered with enhanced
rigidity to help provide rear control and linear yaw response; it
also provides improved trunk space.
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. Like IS
sedans, the IS250C and IS350C meet the Ultra-Low Emission Vehicle II
(ULEV II) certification.
An advanced six-speed automatic transmission with
steering-wheel-mounted paddle shifters is standard on the IS 350C.
The IS 250 C comes with either a six-speed manual transmission or
the paddle-shift, six-speed automatic transmission.
Easy Access Utility and Comfort
The new 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. In addition, the passenger seat features a power
slide button on the top of the seatback to ease rear seat
ingress/egress. An available new 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 C also is equipped with a standard power tilt and telescoping
steering column to help the driver quickly get into a comfortable
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, information on objects detected in
the rear are shown in greater detail on that system's seven-inch
display 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 Brake Assist so that increased braking will be
applied the instant the driver depresses the pedal.
Standard Hill-start Assist Control helps prevent the vehicle from
moving backward when the driver moves their foot from brake pedal to
the accelerator. The system will also be available for the first
time with the manual transmission.
The standard Lexus Premium Audio System features a six-disc, in-dash
CD changer, and eight speakers. 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. In
addition to the 1/8-inch audio mini jack on the IS sedan, the IS
convertible will also have a standard USB connector in the center
console for interface with an iPod®. The audio system will not only
play the music on the iPod, but it will also display information on
the available navigation screen such as artist, album and song
Bluetooth® Audio wireless connectivity is another new feature for
those customers with compatible devices. An integrated XM® satellite
radio receiver (subscription required) offers a wide variety of
programming, while standard hands-free voice recognition and
Bluetooth® technology for models without optional navigation allow
phone calls to be made and received while driving.
Lexus’ latest Hard-Disk Drive (HDD) navigation system, with a new
set-up display and increased audio-display tabs, is available on the
IS convertible and is complete with a seven-inch VGA touch-screen,
back-up camera, and XM® NavTraffic and NavWeather (subscription
required). The navigation system also includes as standard on all
navigation-equipped IS convertibles Lexus’ latest casual-language
voice recognition system, Voice Command, which builds upon the
previous-generation system’s functionality, adding more
spoken-command flexibility. 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.
A Mark Levinson® Premium Surround Sound Audio system, exclusive to
Lexus, 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
seven-inch color touch screen when the parking brake is engaged.
Lexus Safety and Security
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 Anti-lock Braking System (ABS), Electronic Brake force
Distribution (EBD) and Brake Assist (BA). The IS350C is equipped
with 13.15-inch front and 12.20-inch rear rotors with aluminum
four-piston front calipers to aid in heat dissipation and stopping
power and reduce unsprung weight. The IS250C has 11.65-inch front
and 12.20-inch rear rotors.
Passive-safety technology begins with a number of body-structure
changes integrated in the IS250C and IS350C 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 new enlarged
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
area that helps to provide overall occupant protection.
The available High Intensity Discharge (HID) headlamps paired with
the Adaptive Front-lighting System (AFS) helps to illuminate a curve
as the driver steers into it.
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.
F-Sport Performance Accessories
Available for IS C
The IS C 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.
Lexus EnformTM and Safety
The Lexus IS C offers an
all-new telematics system, Lexus Enform™ with Safety Connect™,
available by subscription. Complimentary one-year trial
subscriptions are included on all purchases of new Lexus vehicles
equipped with these features. Both the Lexus Enform and the Safety
Connect response center operate 24 hours a day, 7 days a week—every
day of the year.
Safety Connect, the cornerstone of the services, is available on
both non-navigation and navigation-equipped IS C and offers four
safety and security features: Automatic Collision Notification,
Stolen Vehicle Location, Emergency Assistance Button (SOS), and
Enhanced Roadside Assistance, which adds GPS data to the already
included warranty-based Lexus roadside service.
Lexus Enform, available only on navigation-equipped vehicles,
includes all of the Safety Connect features and builds upon them
with the premium services of Destination Assist and eDestination.
Destination Assist agents are available via the on-board cellular
equipment and can help drivers find a specific address, a business
by name, or a type of business (e.g., gas station, movie theater,
etc.), and even Zagat®-rated restaurants, and then send the
coordinates to the navigation system for routing.
drivers can go online via LexusDrivers.com to save and sort
destinations in up to 20 folders, each holding as many as 10
destinations. Then drivers can send the locations—up to 200 at a
time—to their vehicle, where they will be available for download
into the navigation system. Online, drivers can create personalized
location names (e.g., “Favorite sushi,” “1 PM Appt,” “Kids’ doc,”
etc.) and even list notes about their saved locations, all helping
them see exactly the information they choose in the vehicle.
Lexus Insider™, a complimentary, opt-in service is also available
without a subscription on all Lexus Enform-equipped vehicles. This
feature offers in-vehicle audio casts that provide owners access to
useful vehicle tips and event information, and insights into
exclusive owners' benefits – all designed to further enhance the
XM – Beyond Radio
Lexus Enform vehicles
are factory ready for subscriptions to a variety of innovative XM
services. An integrated XM® satellite radio receiver is standard.
Additionally, Lexus Enform vehicles feature XM NavTraffic® and XM
NavWeather™ services. XM NavTraffic informs the driver of current
traffic conditions with real-time traffic displays. When traffic
problems are detected the navigation system alerts the driver so
that the route can be adjusted. XM NavWeather provides near
real-time weather conditions as well as spoken and nav-screen
forecasts, both based on official National Weather Service data.
Lexus Enform also provides the platform for XM® Sports and Stocks,
which features in-vehicle updates on sports and stocks so drivers
can stay connected to their favorite teams and investment data while
on the road. XM Sports provides game results and schedules for up to
five personally selected national league sports teams while XM
Stocks supplies data for up to 10 personally selected stocks. After
inputting their selections, drivers can access the reports either by
the navigation system, or by using the voice command system, adding
a new level of flexibility.
XM services require separate XM subscriptions. The XM Sports and
Stocks service is included with an XM® radio subscription. All XM
services offer complimentary 90-day trial subscriptions.
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.