To determine if Piotr offers pre-purchase inspections for Subaru vehicles, we need to examine the provided content for mentions of Subaru or a general statement about the brands he services.

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The provided content from mobilnydiagnosta.pl/oferta/ explicitly lists Subaru among the Japanese car brands that Piotr diagnoses and services [1]. The text states, "Toyota • Lexus • Honda • Mazda • Nissan • Infiniti • Subaru • Mitsubishi" [1]. Furthermore, the service description for "Sprawdzenie auta przed zakupem" (Pre-purchase car inspection) is comprehensive and applies to various car types, including gasoline, diesel, hybrid, and electric vehicles [1]. The service involves a detailed assessment of the bodywork, paint, components, electronics, suspension, drivetrain, a test drive, and full computer diagnostics [1]. Piotr also mentions, "Nie widzisz swojej marki? To żaden problem! Diagnozuję również inne, mniej popularne marki. Zadzwoń:+48 696 262 831" (Don't see your brand? No problem! I also diagnose other, less popular brands. Call: +48 696 262 831) [1]. This indicates a broad scope of service that includes, but is not limited to, the listed brands. Therefore, based on this information, Piotr does offer pre-purchase inspections for Subaru vehicles [1] [2].