Kammala jumla mai zuwa: Daga ƙarshe, sabuwar ƙungiyar Brawn GP ta mallaki motar, kuma an gyara ta don saukar da injin Mercedes-Benz a maimakon injin Honda da ake tsammani. Jenson Button ya gudanar da shakedown <unk> motar da ke nuna fararen fata, mai haske mai haske da launin rawaya da baƙar fata. Tawagar ta ba BGP 001 gwajin farko a Circuit de Catalunya a ranar 9 ga Maris, 2009, yana jagorantar jadawalin lokaci sau da yawa. Tare da gwajin motsawa zuwa Circuito de Jerez, Brawn GP ya ci gaba da saita saurin, ya gama gwajin yana jagorantar biyu daga cikin gwaje-gwaje uku. A yayin wata hira Brawn ya ce akwai karin saurin da zai zo bayan ya bayyana cewa '... motar BGP 001 ita ce sakamakon watanni 15 na aikin ci gaba mai zurfi kuma tawagar ba ta da komai sai dai abin al'ajabi a cikin alƙawarin da suka yi na samar da motoci biyu a kan lokaci don tseren farko.' A tseren farko, ƙungiyoyi huɗu sun gabatar da ƙarar hukuma game da masu watsawa na baya na Williams FW31, Toyota TF109 da Brawn BGP 001 bisa dalilin cewa ba su faɗa cikin girman da aka tsara a cikin ƙa'idodin ba, amma bayan nazarin motocin masu tsere sun ba da rahoton cewa motocin sun kasance na doka. An yi kira da wannan hukunci kuma an saurari karar bayan tseren na biyu na kakar. Duk da haka hukumar kula da wasannin motsa jiki ta yanke hukuncin cewa motar ta halatta. Akwai wani korafi a Malaysia bayan haka BMW Sauber ya shiga cikin roko bayan an yi la'akari da su a matsayin doka, kuma. Bayan daukaka kara da diffuser aka dauke doka ta FIA. A cikin
A Spain, motar ta sami ci gaba na farko tun daga Ostiraliya wanda ya fi dacewa da buƙatun sanyaya daban-daban na injin Mercedes kuma ya ba Brawn 1<unk>2, kamar yadda yake a Melbourne.