What is OEM number 51-33-7-140-588 and which part does it identify?

OEM number 51-33-7-140-588 identifies the front right window regulator for the BMW 3 Series, covering the E90 Saloon and E91 Touring generations. This part fits BMW E90 325i, BMW E90 325xi, BMW E90 328i, BMW E90 328xi, BMW E90 330i, BMW E90 330xi, BMW E90 335d, BMW E90 335i, BMW E90 335xi, BMW E90 M3, BMW E91 325xi, BMW E91 328i, among other trims across both body styles. The assembly is supplied without the electric window motor, which is a separate component and must be ordered independently if worn. This is the right-hand (passenger side on left-hand-drive markets) variant; the corresponding left-hand variant carries a different OEM number and must be ordered separately for the opposite door. OEM number 51-33-7-140-588 may fit additional vehicle models not listed here, so it is always advisable to verify against the OEM number on the existing part before ordering.

Does OEM number 51-33-7-140-588 fit my vehicle?

OEM number 51-33-7-140-588 fits the BMW 3 Series E90 Saloon and E91 Touring, built between 2005 and 2012. This is BMW parts item 51-33-7-140-588 (51-33-7-140-588), described as URO Premium Front Right Window Regulator for E90/E91 323i, 325i, 325xi, 328i, 328xi, 330i, 330xi, 335i, 335xi, M3 Sedan/Wagon (2006, 2007, 2008, 2009, 2010, 2011, 2012). The part fits the front right door only and applies across petrol and diesel engine variants, since the regulator mechanism itself is engine-independent, but it is specific to the E90/E91 body generation and cannot be fitted to earlier or later generations without confirming the printed OEM number.

Several critical constraints gate correct fitment. The part is the right-hand (passenger side) regulator only, and the left-hand equivalent uses OEM number 51-33-7-140-587, which must be ordered separately. The regulator is supplied without the window motor, so the motor must be sourced and fitted separately if it has failed. The part is specific to the four-door Saloon (E90) and five-door Touring (E91) body styles, and does not fit the two-door E92 Coupe or E93 Convertible variants, which use a different regulator mechanism. The E92 3-Series uses a Front Window Regulator with a different OEM identity, made by Dorman under part numbers 51337193455 or 51337193456, and this buyers note confirms it fits coupe models only.

Cross-reference data also associates OEM number 51-33-7-140-588 with the BMW 3 Series F30, but this later-generation platform uses a materially different door and regulator assembly, and dedicated part numbers exist for it. This vehicle should not be assumed compatible: verify the printed number on the existing part before ordering.

OEM number 51-33-7-140-588 may fit additional vehicle models not listed here. Always verify by checking the OEM number printed on the existing part.

Fits: BMW 3 Series E90 Saloon and E91 Touring, 2005-2012, front right (passenger side) door only, supplied without window motor
Does not fit: BMW 3 Series E92 Coupe/E93 Convertible (different regulator mechanism); BMW 3 Series F30/F80 (different platform generation, requires verification)

When should OEM number 51-33-7-140-588 be replaced?

Replacement triggers

• Window moves slowly or hesitates partway through its travel.
• Window drops slightly from its fully closed position after the door is shut.
• Grinding, clicking, or rattling noise heard from inside the door when the window is operated.
• Window becomes misaligned in its channel, causing wind noise or water ingress.
• Window motor runs but the glass does not move, indicating a failed or frayed regulator cable.
• Window stops responding at a fixed point and will not complete a full up or down cycle.

We used AI to help write this text. We regularly check the information - but cannot guarantee that all data is accurate.