Rubuta ci gaba don wannan sakin layi - Sanin yadda Alonso ya fi shi a, Trulli ya inganta sosai a shekara mai zuwa. A farkon rabin kakar ya kasance mafi kyau na biyu Renault direbobi, racking up m maki da podiums. A Monaco, a karshe ya samu nasararsa ta karshe bayan ya yi kwallo mai ban mamaki daga matsayi na farko. Bayan ya yi kyau sosai, dan Italiyan ya kasance da sha'awar tsayawa tare da kungiyar don 2005, amma dangantakarsa da shugaban kungiyar Briatore ta yi mummunan rauni. Kuskuren kusurwa na ƙarshe wanda ya ba da damar Rubens Barrichello na Ferrari a kan podium a Faransa
ya fusata tawagar, kuma daga wannan lokacin kwanakin sa tare da masana'antun Faransa sun ƙidaya. Bai ci maki ba bayan Grand Prix na Faransa kuma ya kasance a hankali a lokacin tsere. Daga baya ya zargi kungiyar da fifita Alonso, amma dalilan da yasa kakar 2004 ta lalace ba a taɓa gano su yadda ya kamata ba. An kore shi tsere uku kafin karshen kakar kuma an maye gurbinsa da Zak Villeneuve, duk da cewa yana jagorantar abokin aikinsa a gasar a wancan lokacin. Trulli ya riga ya yarda ya tuka Toyota a shekara ta 2005, kuma ficewarsa daga Renault ya ba shi damar ɗaukar sabon kujerarsa don tsere biyu na ƙarshe na kakar 2004, ya maye gurbin Ricardo Zonta.