Lexus HS

Lexus HS (ANF10)

Manufacturer	Lexus (Toyota)
Production	2009–present
Model years	2010–present
Assembly	Miyawaka, Fukuoka, Japan
Class	Entry-level luxury hybrid
Body style	4-door sedan
Layout	FF layout
Engine	2.4L 2AZ-FXE I4
Transmission	Continuously variable transmission
Wheelbase	106.3 in (2,700 mm)
Length	184.8 in (4,690 mm)
Width	70.3 in (1,790 mm)
Height	59.3 in (1,510 mm)
Related	Toyota Allion Toyota Avensis Toyota Sai Toyota Corolla Axio

The Lexus HS is a dedicated hybrid vehicle introduced by Lexus as a new entry-level luxury compact sedan in 2009. It is classified as a compact under Japanese regulations concerning vehicle exterior dimensions and engine displacement. Unveiled at the North American International Auto Show in January 2009, the HS 250h went on sale in July 2009 as a 2010 model in Japan, followed by its debut in the United States in August 2009. The HS 250h represents the first dedicated hybrid vehicle in the Lexus lineup, as well as the first offered with an inline four gasoline engine. Bioplastic materials are used for the vehicle interior.With a total length of 184.8 inches, the Lexus HS is slightly larger than the Lexus IS in terms of size, but still smaller than the mid-size Lexus ES. Like the larger Lexus ES and Lexus RX FWD (which is also shared on same production line), but unlike other Lexus vehicles, the HS is a front-wheel drive car in the Lexus lineup. According to Lexus, the HS designation stands for Harmonious Sedan. The HS is offered as IS's front-wheel drive counterpart.

Development

Lexus displayed the HS 250h for the first time at the North American International Auto Show in 2008, with plans to launch the vehicle in major world markets including the U.S. and Japan. According to division officials, the HS was produced in response to consumer interest in dedicated hybrid models, with many stating that they would purchase such a vehicle if a luxury make offered one.The success of the Toyota Prius with upper-income buyers was also a consideration. The resulting HS 250h would become the most fuel-efficient in the Lexus lineup to date. At its launch, the HS 250h was also claimed to be the most fuel-efficient luxury vehicle in the U.S.

2010 Lexus HS 250h (Japan)

To cater to environmentally-conscious buyers, the HS 250h design included carbon footprint-reducing considerations, including the adoption of plant-derived "eco-plastic" (bioplastic) materials for the interior, cargo space, and foam injected areas. Bioplastic plant sources include kenaf fibers and castor seeds.Kenaf-based material was previously used in the Lexus ES rear interior. According to the manufacturer, 85 percent of the vehicle is fully recyclable. For the Japanese domestic market, the Lexus HS250h features a Harmonious Driving Navigator system which monitored efficient driving characteristics and compared them with others to determine the 'greenest' overall driver, for which charitable donations could be made.
The HS 250h's platform is based on the third generation Toyota Avensis, itself related to the traditional gasoline engine Toyota Allion sold from 2001 to 2007, and is based on 2.4-litre-engined Corolla with electric motors. Other related models can include the Toyota Premio, Toyota Vista (5th gen), Toyota Opa, Toyota Wish, and Toyota Caldina (3rd gen). In July 2009, the HS 250h made its sales launch in Japan, with 1,500 pre-orders logged at its introduction. This figure was reportedly three times greater than originally forecasted.The Toyota Sai, a sister model sharing the same platform and hybrid drivetrain, was launched in Japan in October 2009. However, HS 250h was not slated for the European market, where the similarly-sized IS 220d is sold.

Powertrain

The gasoline-powered portion of the HS 250h powertrain is the 2.4L 2AZ-FXE inline-four engine. The 2AZ-FXE produces 147 hp (110 kW) and 105 ft·lbf (142 N·m) of torque at 4000 revolutions per minute. This is assisted by an electric motor for a combined output of 187 hp (139 kW). The HS 250h uses a similar hybrid drivetrain as the Toyota Camry Hybrid.

HS 250h inline-four engine with electric motors

The HS 250h's EPA fuel economy is estimated at 35 miles per US gallon (6.7 L/100 km; 42 mpg_-imp) in the city and 34 miles per US gallon (6.9 L/100 km; 41 mpg_-imp) on the highway.The HS 250h engine runs on the Atkinson cycle, and the powertrain uses a continuously variable transmission. A 90 pounds (41 kg) nickel metal hydride battery situated beneath the rear seats serves to power the electric motor.An additional system included on the HS 250h's Lexus Hybrid Drive powertrain is an exhaust-heat recovery system to reduce engine warm-up periods (optimizing engine start-stop times). The Atkinson cycle configuration and exhaust-heat recovery system is also used on the 2010 Lexus RX 450h.
The HS 250h can be operated in either driver-selectable EV, Eco, or Power modes. The EV mode is suited for short-distance pure electric driving at speeds of up to 20 miles per hour (32 km/h),the Eco mode can be selected for the greatest fuel efficiency in mixed gas-electric driving, and the Power mode offers more performance in contrast to the Eco mode. The 0-60 time is listed at 8.4 seconds and the top speed is 112 miles per hour (180 km/h).

Equipment

Lexus HS 250h interior with pop-up display screen

Technological features offered on the HS 250h include a pop-up navigation and infotainment system with Remote Touch controller,a Mark Levinson premium sound system, and safety systems. The Remote Touch system is used with the GPS navigation system and operates using haptic feedback. The Lexus Enform telematics service is introduced on the HS 250h.
Safety systems include an Intelligent Highbeam (IHB) system, Lane Keep Assist (LKA) system, and onboard cameras. The IHB senses oncoming vehicles and adjusts lighting to prevent glare. The LKA system, operating in conjunction with the radar adaptive cruise control, helps keep the vehicle in its lane. Up to five onboard cameras include Wide-View Front and Rear-View backup cameras.These cameras allow the driver to see around corners. The LED detector Driver Monitoring System warns if the driver is not paying attention and obstacles are detected in the vehicle's path, preventing accidents due to drowsiness or distraction. A Pre-Collision System is designed to minimize damage from accidents.

Sales

Side view of the HS 250h

The Lexus HS has had success in the Japanese market, where in its the first month, the vehicle recorded 3,000 pre-orders, 10,000 sales, and a waiting list that was six months long. Because of the higher than expected demand in Japan, Lexus lowered its allocation and sales plans for the United States in October 2009.
In early 2010, based on units sold, the HS was considered one of the less popular Lexus sedans in the US, being outsold by the ES, IS, and LS. A recall of models for reprogramming the brake software in February 2010 also led some buyers to question the model; with word of the issue possibly scaring away potential buyers. Earlier in its release however, the HS 250h was the top selling Lexus hybrid, with monthly sales comparable to the economy Honda Insight hybrid. In late 2011, Ward's AutoWorld reported that Lexus was discontinuing sales of the HS 250h in the U.S.

Calendar year	Total sales, U.S.	Total sales, Japan
2009	6,699	8,494
2010	10,663
2011	2,864

2010 recall

On June 25, 2010 Lexus recalled 17,801 MY 2010 HS250h models for failing to comply with FMVSS 301, "Fuel System Integrity", due to excessive fuel leakage in the event of a rear-end collision.