Unveiling the 2005 Subaru WRX: Key Updates Explored

For enthusiasts of Japanese performance cars, the Subaru WRX has always been a beacon of raw power, all-wheel-drive prowess, and rally-bred pedigree. The 2005 model year brought a series of thoughtful updates to both the standard WRX and its more extreme sibling, the STi, further solidifying their positions in the automotive landscape. These enhancements weren't just cosmetic; they introduced significant improvements in comfort, convenience, and, crucially, performance, ensuring the WRX continued to deliver an exhilarating driving experience.

Refinements for the 2005 WRX

The standard 2005 Subaru WRX received a welcome array of upgrades that focused on enhancing the daily driving experience without diluting its sporting spirit. Subaru listened to its customers, integrating features that brought a touch more sophistication and comfort to the rally-inspired machine.

Exterior and Styling Tweaks

Visually, the 2005 WRX sported a refreshed look that subtly modernised its aggressive stance. Key among these were the new design 16-inch grey-coloured alloy wheels, which offered a fresh aesthetic. The lower body trim, previously black, was now body-coloured, providing a more cohesive and premium appearance. Furthermore, the headlights received a subtle but effective update with smoked headlight lenses, adding a hint of menace to the front fascia.

Interior Comfort and Convenience

Inside the cabin, the focus was squarely on improving user comfort and practicality. A significant upgrade was the introduction of a new automatic climate control system, complete with air filtration. This meant more precise temperature management and a cleaner cabin environment, a welcome addition for both short commutes and longer journeys. The centre console was redesigned, now featuring two convenient cupholders, a small but impactful change for everyday usability. Door panel armrests were also redesigned, now finished in cloth and integrating power mirror controls for improved ergonomics.

Infotainment and Connectivity

Recognising the importance of in-car entertainment, the 2005 WRX came equipped with an upgraded audio system. This included an AM/FM/CD changer with silver faceplate and proper bass, mid, and treble adjustments, paired with improved standard speakers. The keyless remote fob also received a new design, making it more modern and user-friendly. These changes, while not revolutionary, collectively enhanced the overall quality of life inside the WRX.

Elevating the 2005 WRX STi

For those who craved even more performance, the 2005 WRX STi received a suite of upgrades that cemented its status as a track-ready weapon with road-going manners. These improvements were largely focused on enhancing its already formidable handling and driver engagement.

Performance Enhancements

Perhaps the most significant mechanical upgrade for the 2005 STi was the introduction of a Helical Front Limited-Slip Differential. This advanced differential system greatly improved traction and turn-in, allowing the STi to put its considerable power down more effectively, especially during aggressive cornering. Complementing this, the rear wheels were made half an inch wider, now measuring 8 inches, accommodating wider 225/45R17 Bridgestone Potenza RE070 summer tyres for increased grip. To house these wider wheels, the STi gained distinctive body-coloured rear wheel arch fender flares, further accentuating its aggressive stance.

Another subtle yet crucial addition was the new power steering oil cooler, designed to maintain optimal fluid temperatures during spirited driving, ensuring consistent steering feel and performance under demanding conditions.

Advanced Control and Safety

The 2005 STi also saw the integration of a Yaw sensor, a component of the lateral G sensor system. This enhancement provided more precise vehicle dynamic control, contributing to the STi's exceptional handling capabilities. Security was also bolstered with a new immobiliser key system, with three keys supplied, adding an extra layer of protection against theft. Like the standard WRX, the STi also featured new smoked headlight lenses and new daytime running lights, enhancing visibility and safety.

Interior Refinements for the STi

Inside, the STi mirrored some of the standard WRX's convenience upgrades, including the new automatic climate control knobs, new door armrests with power mirror controls, and the redesigned centre console with two cupholders. The keyless remote fob was also updated. Specific to the STi, the seat cushion side bolster material was new, offering improved support and durability during high-performance driving. The AM/FM/CD changer with bass, mid, treble adjustments and 6 speakers was also standard, ensuring a quality audio experience.

Shared Improvements Across the Range

While each model received specific enhancements, some improvements were shared across both the WRX and STi for 2005, highlighting Subaru's commitment to refining the overall Impreza platform:

• New Automatic Climate Control with Air Filtration: A universal upgrade for improved cabin environment.
• Redesigned Keyless Remote Fob: A more modern and ergonomic design.
• New Centre Console with Two Cupholders: A practical addition for everyday convenience.
• New Door Panel Armrests with Power Mirror Controls: Enhanced ergonomics and interior aesthetics.
• Smoked Headlight Lenses: A subtle styling touch applied to both.
• New Colours: Both models were available in an updated palette, including new Crystal Grey Metallic and Obsidian Black Pearl, alongside classic Aspen White, Platinum Silver, San Remo Red (WRX only), and the iconic WR Blue Pearl.

Core Strengths: What Remained Great

Beyond the new features, the 2005 WRX and STi continued to build upon the foundations that made them legends. Both retained their signature turbocharged Boxer engines, renowned for their low centre of gravity and distinctive exhaust note. The WRX featured a 2.0-litre DOHC engine producing 227 horsepower, while the STi boasted a more potent 2.5-litre DOHC unit delivering a thrilling 300 horsepower. Subaru's symmetrical all-wheel-drive system remained a cornerstone, providing unparalleled traction and stability in all conditions. The STi's Driver Controlled Centre Differential (DCCD) continued to offer drivers precise control over the front/rear power split, allowing for tailored performance.

Key Mechanical Specifications (2005 Models)

Safety Features

Subaru continued its commitment to safety, equipping both models with features designed to protect occupants. Standard safety aspects included dual front and side airbags, 3-point lap and shoulder belts for all occupants, and collapsible pedals to reduce foot injury risk in collisions. The Anti-lock Braking System (ABS) with Electronic Brake-force Distribution (EBD) was also standard, optimising braking performance under various conditions. The chassis featured front and rear crumple zones, reinforced door beams, and a robust A-pillar beam, all contributing to a strong safety cell.

Maintenance and Ownership

Owning a performance vehicle like the WRX or STi requires diligent maintenance to ensure longevity and optimal performance. Subaru recommends a specific break-in period for new cars: keeping RPMs under 4000, varying speeds, and avoiding hard starts/stops for the first 1000 miles. Regular servicing is crucial:

• First Oil Change: Recommended at 3,000 miles / 3 months.
• Subsequent Oil Changes: Every 3,750 miles, or at least every 7,500 miles.
• Tyre Rotation: Every 7,500 miles.
• Minor Service: At 15,000 miles, including inspection and filter changes.
• Major Service: At 30,000 miles, involving major fluids, spark plugs (WRX at 60,000 miles), and filter changes.
• Timing Belt Replacement: At 105,000 miles.

Adhering to these schedules helps maintain the car's performance and reliability, especially for the high-strung turbocharged engines.

Optional Extras and Personalisation

For 2005, Subaru also offered a range of factory and dealer-installed options to allow owners to further personalise their WRX or STi. These included practical items like roof rack cross bars and cargo area trays for wagons, to performance-enhancing accessories such as short-throw shifters and turbo boost gauges. Comfort and convenience options like auto-dimming rear-view mirrors (some with Homelink), armrest extensions, and subwoofer/amplifier upgrades were also available. For the STi, specific performance packages might include titanium shift knobs or further gauge enhancements, catering to the enthusiast market.

Frequently Asked Questions (FAQs)

Q: What were the most significant new features for the 2005 WRX?

A: The 2005 WRX received several notable updates, including new design 16-inch grey alloy wheels, automatic climate control with air filtration, smoked headlight lenses, redesigned door armrests with integrated power mirror controls, body-coloured lower trim, upgraded speakers, and a new centre console with cupholders. These aimed to improve comfort, convenience, and styling.

Q: How did the 2005 STi improve on previous models?

A: The 2005 STi saw crucial performance enhancements, most notably the new Helical Front Limited-Slip Differential for improved traction, wider 8-inch rear wheels with fender flares to accommodate them, and a power steering oil cooler. Interior updates included new seat bolster material, an immobiliser key, and a Yaw sensor for enhanced vehicle dynamics.

Q: Was there a significant power increase for the 2005 models?

A: The 2005 WRX retained its 227 horsepower 2.0-litre engine, while the STi continued with its 300 horsepower 2.5-litre engine. The focus of the 2005 updates was more on refinement, handling, and interior features rather than a raw power boost for existing engines.

Q: What type of fuel is recommended for the 2005 WRX and STi?

A: Both the 2005 WRX and STi require a minimum of 91 octane fuel. Using high octane fuel is particularly important for the turbocharged engines to ensure optimal performance and prevent engine knock.

Q: Are the 2005 WRX and STi good daily drivers?

A: With the 2005 updates focusing on comfort and convenience, such as automatic climate control and improved interior ergonomics, both the WRX and STi became more liveable as daily drivers. However, their sporty suspension and performance-oriented nature mean they still offer a firm ride compared to standard family cars.

Conclusion

The 2005 Subaru WRX and STi represented a significant step in the evolution of these iconic performance vehicles. By blending their legendary rally heritage with crucial enhancements in comfort, convenience, and advanced performance technology, Subaru ensured that these models remained highly desirable to enthusiasts. Whether it was the subtle refinements of the standard WRX or the sharpened dynamics of the STi, the 2005 iteration offered a compelling package that continued to deliver driving thrills while being more accommodating for everyday use. These models truly embodied Subaru's commitment to continuous improvement, solidifying their place in the hearts of performance car aficionados worldwide.

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