2006 Subaru Impreza WRX STi S204

KEY FACTS

• This Subaru Impreza WRX STi S204 is a rare and highly sought-after limited-edition Japanese-market performance saloon, combining Subaru Tecnica International's motorsport expertise with enhanced chassis, engine and aerodynamic development.
• It is powered by a turbocharged 2.0-litre flat-four boxer engine driving all four wheels via a six-speed manual transmission.
• This example was originally a Japan-delivered model, which was first registered in January 2006. It was exported with an auction grade of 4.5, and was first registered in the UK in November 2024. The seller has owned the car since January 2026.
• This Impreza WRX STi S204 is number 33 of only 600 examples produced exclusively for the Japanese domestic market.
• The seller believes the car is one of just 91 examples finished in Obsidian Black.
• The odometer indicates 54,589 km, though this is not warranted.

EQUIPMENT AND FEATURES

• Introduced as the successor to the acclaimed S203, the Impreza WRX STi S204 features a larger twin-scroll ball-bearing turbocharger, a new ECU, a silicone air intake duct, an air-cooled engine oil cooler, higher strength casting pistons, a titanium sports exhaust, a stronger chassis, improved roll rigidity, revised suspension, and innovative performance dampers fitted to the body structure between the front and rear suspension strut towers.
• This example is finished in the stylish shade of Obsidian Black, over a black leather and synthetic suede-trimmed interior, featuring embroidered STi logos on the front seat backs, and satin-silver and carbon-fibre trim.
• It rides on a set of 18-inch BBS multi-spoke forged alloy wheels with red wheel nut caps and centre caps, framing gold Brembo brake callipers, and fitted with Yokohama Advan Neova tyres.
• Equipment includes xenon headlights, carbon-fibre-backed Recaro bucket seats, automatic air conditioning, an intercooler water sprayer, the Driver Controlled Centre Differential, an STi Genome steering column-mounted boost gauge, and electric windows.
• This example has been enhanced with a Kakimoto performance exhaust system, an HKS induction kit, a rear-view camera, a triple upper dashboard-mounted gauge pod with Defi water temperature, oil temperature, and oil pressure gauges, a Pioneer Carrozzeria double-DIN media system with satellite navigation, carbon-fibre bonnet struts, and an adjustable Blitz suspension package. The seller notes that these modifications were fitted in Japan.
• The engine management system has been recalibrated for UK fuel, with documentation on file indicating an output of approximately 360hp.
• Accompanying the car are a large history file, import documentation, photographs from its arrival in the UK, service and maintenance invoices, and two keys.

CONDITION

• Please refer to the photo gallery to assess the exterior and interior condition.
• The most recent MOT test was conducted on 22 October 2025 at an indicated 52,962 km, which resulted in a first-time pass with no advisories.

SERVICE HISTORY

• The seller states that the last maintenance was carried out in January 2026 at an indicated 53,109 km by Fairmont Motors, comprising an engine oil and filter service together with an inspection.
• In October 2024, the car received a major service, including the replacement of the timing belts, air-conditioning belt, fuel filter, brake fluid, and an alloy camshaft pulley kit supplied by Roger Clark Motorsport.
• A service entry was recorded in the service book during 2022 while the car was in Japan.
• Under the current ownership, the car has also received a new front splitter from Roger Clark Motorsport, a replacement OEM offside mirror, and professional detailing work.
• Please note: Japanese service history documents can be seen in the photo gallery.

SUMMARY

This Subaru Impreza WRX STi S204 is a rare Japanese-market special edition that represents one of the ultimate developments of the acclaimed GD-generation Impreza platform. Number 33 of only 600 examples produced, with desirable factory upgrades, a collection of period Japanese performance upgrades, and a timeless colour scheme, it offers an engaging and highly focused driving experience. Equally suited to enthusiastic road use, collector ownership, or attendance at marque events, it would make a rewarding addition to any collection of modern Japanese performance cars.

Descriptions are provided by the seller and, to their knowledge, are accurate and not misleading. Buyers must satisfy themselves of the description’s accuracy, and independent research is strongly advised. Enquiries should be raised in the comments section and any inspections arranged before bidding.

Classic and collectible vehicles may have had cosmetic or bodywork repairs that are not visually apparent. Photographs may not accurately reflect colour or condition, so buyers should confirm key details directly with the seller. Unless stated otherwise, you must assume that any cherished, personalised, or heritage vehicle registration is not included in the sale of a car or bike. Please see our Terms and Conditions for full details.

All UK-registered cars and motorbikes on Collecting Cars are run through an online HPI check. On the HPI report, this vehicle shows no insurance database markers for damage or theft, and has no finance owing.