e46 330d saloon steering angle sensor

#1
hi i have a e46 330d saloon 2002 recenlty i had my turbo changed as it went off on me and while my turbo was blown my dcs light stayed on and the brake light plus the abs light, i switched car off and on and it dissapeared this happend a few times but then it was ok, once when the turbo was changed a day later these light now stay on, i have had it diagnosed and it says error code 5e40 steering angle sensor so i phoned bmw and they told me like £ 140 for a stupid sensor i bought it from a breakers yard 4 way less and now i got it changed but the lights have not turned off and it is the same as befor with same error code can somebody please help me should i take it to the dealers and how much would this cost me thankss
 


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