Composition comprising at least: - one thermoplastic polyamide resin; - from 3-10 % by weight, relative to the total weight of the composition, of impact modifiers; - heat stabilization system consisting solely of a polyhydric alcohol selected from the group consisting of: diols, such as 1,5-pentanediol, 2,2-dimethyl-1,3 propanediol, triethylene glycol, poly(glycol ether)s, triols, for instance glycerol, trimethylolpropane, 2,3-di-(2'-hydroxyethyl)cyclohexan-1-ol, hexane-1,2,6-triol, 1,1,1-tris-(hydroxymethyl)ethane, 3-(2'-hydroxyethoxy)propane-1,2-diol, 3-(2'-hydroxypropoxy)propane-1,2-diol, 2-(2'-hydroxyethoxy)hexane-1,2-diol, 6-(2'-hydroxypropoxy)hexane-1,2-diol, 1,1,1-tris-[(2'-hydroxyethoxy)methyl]ethane, 1,1,1-tris-[(2'-hydroxypropoxy)methyl]propane, 1,1,1-tris-(4'-hydroxyphenyl)ethane, 1,1,1-tris-(hydroxyphenyl)propane, 1,1,3-tris-(dihydroxy-3-methylphenyl)propane, 1,1,4-tris-(dihydroxyphenyl)butane, 1,1,5-tris-(hydroxyphenyl)-3-methylpentane, di-trimethylopropane, trimethylolpropane ethoxylate, or trimethylolpropane propoxylate; polyols, such as pentaerythritol, dipentaerythritol, and tripentaerythritol; and saccharides such as cyclodextrin, D-mannose, glucose, galactose, sucrose, fructose, xylose, arabinose, D-mannitol, D-sorbitol, D- or L-arabitol, xylitol, iditol, talitol, allitol, altritol, gulitol, erythritol, threitol and D-gulonic-γ-lactone, - one reinforcing or bulking filler; and - one additive selected from the group consisting of: lubricants, flame retardants, plasticizers, nucleating agents, catalysts, antioxidants, antistatic agents, colorants, mattifying agents and molding aids. - one thermoplastic polyamide resin; - from 3-10 % by weight, relative to the total weight of the composition, of impact modifiers; - heat stabilization system consisting solely of a polyhydric alcohol selected from the group consisting of: diols, such as 1,5-pentanediol, 2,2-dimethyl-1,3 propanediol, triethylene glycol, poly(glycol ether)s, triols, for instance glycerol, trimethylolpropane, 2,3-di-(2'-hydroxyethyl)cyclohexan-1-ol, hexane-1,2,6-triol, 1,1,1-tris-(hydroxymethyl)ethane, 3-(2'-hydroxyethoxy)propane-1,2-diol, 3-(2'-hydroxypropoxy)propane-1,2-diol, 2-(2'-hydroxyethoxy)hexane-1,2-diol, 6-(2'-hydroxypropoxy)hexane-1,2-diol, 1,1,1-tris-[(2'-hydroxyethoxy)methyl]ethane, 1,1,1-tris-[(2'-hydroxypropoxy)methyl]propane, 1,1,1-tris-(4'-hydroxyphenyl)ethane, 1,1,1-tris-(hydroxyphenyl)propane, 1,1,3-tris-(dihydroxy-3-methylphenyl)propane, 1,1,4-tris-(dihydroxyphenyl)butane, 1,1,5-tris-(hydroxyphenyl)-3-methylpentane, di-trimethylopropane, trimethylolpropane ethoxylate, or trimethylolpropane propoxylate; polyols, such as pentaerythritol, dipentaerythritol, and tripentaerythritol; and saccharides such as cyclodextrin, D-mannose, glucose, galactose, sucrose, fructose, xylose, arabinose, D-mannitol, D-sorbitol, D- or L-arabitol, xylitol, iditol, talitol, allitol, altritol, gulitol, erythritol, threitol and D-gulonic-γ-lactone, - one reinforcing or bulking filler; and - one additive selected from the group consisting of: lubricants, flame retardants, plasticizers, nucleating agents, catalysts, antioxidants, antistatic agents, colorants, mattifying agents and molding aids.