Power Window Regulator Replacement for BMW E90 E91 Rear Left - Easy

In this review the focus is on a straightforward, OE replacement style power window regulator for the BMW E90 and E91 rear left (driver side). The bottom line: this is a practical, budget-friendly replacement for owners who need a functioning rear left regulator that lines up with factory mounting points and installs without major modification. Fitment covers a wide range of 2007-on 3 Series models in sedan and station wagon body styles, and the reviewer found it delivers reliable functionality and clear value for money for do-it-yourself repairs.

Key Features

• OE replacement design: Built to match original equipment geometry so the regulator fits the factory door and aligns with existing mounting points.
• Easy fit: The unit is intended for direct replacement which reduces installation time and avoids custom adjustments on compatible BMW E90/E91 doors.
• Wide compatibility: Supports BMW 323i, 325i, 328i, 330i, 335i and M3 models from 2007 onward for sedan and station wagon body styles.
• Driver side, rear left location: Specifically made for the rear left (driver side) position so buyers get the correct orientation for their repair.
• Reference matched: Identified by OEM reference numbers such as 51357140589 and others for straightforward parts confirmation.

Who It's For

This regulator is best for BMW owners, independent mechanics and DIY enthusiasts seeking a budget-conscious replacement that fits the rear left door of 2007-on E90 and E91 sedans and wagons. If the original regulator has failed and the motor is still serviceable or will be reused, this part provides the correct mounting and cable routing for a typical repair.

It is less suitable for vehicles outside the listed BMW 3 Series model range, for drivers needing a complete motorized assembly included, or for those who require an OEM-branded part for warranty-level matching. Buyers expecting included heavy-duty mounting hardware or upgraded materials should check fitment and hardware before installation.

Pros & Cons

Pros

• Direct-fit geometry makes installation predictable and keeps alignment consistent with factory points.
• Many customers report reliable fit and that the part restores window movement effectively.
• Offers strong value for money compared with dealer-priced replacements.
• Clear compatibility notes reduce the chance of ordering the wrong side or body style.

Cons

• Quality reports are mixed, with some buyers finding the build less robust than OEM and noting issues with supplied mounting hardware.
• The motor is not included, so replacement may require reusing the original motor or sourcing a separate unit.

Specifications

Part type	Power window regulator (without motor)
Fitment side	Rear left (driver side)
Compatible models	BMW E90, E91 323i, 325i, 328i, 330i, 335i, M3 (2007 on)
Body style	Sedan or Station Wagon only
Reference numbers	51357140589, BM1550111, 749-468, WR49468

Our Verdict

This rear left power window regulator is a sensible purchase for anyone repairing a 2007-on BMW E90 or E91 who wants a direct-fit, easy fit replacement without paying dealer prices. It restores window operation in most cases and represents good value, though buyers should be prepared to reuse the original motor and confirm mounting hardware before installation.

Frequently Asked Questions

Will this regulator fit my E90 sedan?
Yes, it is specified for E90 and E91 sedan and station wagon models from 2007 onward for the rear left driver side.

Does the part include the motor?
No, this unit is supplied without the motor so the original motor must be reused or purchased separately.

Are mounting bolts and clips included?
Some customers reported issues with mounting hardware, so verify what is supplied and have replacement fasteners on hand if needed.