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Rear Differential Bearings Repair Kit | for BMW 1‑Series / 3‑Series / 4‑Series / X1 / X3 / Z4

Includes 4 Bearings + 3 ACM Oil Seals | OE References: 33127621206, 33121214080, 33121212464, 33121210724 etc.

Brand	for BMW
Type	Rear Differential Bearings & Seals Repair Kit
Fitment	for BMW 1‑Series, 3‑Series, 4‑Series, X1, X3, Z4 models (2003–2021)
Includes	4× Bearings + 3× Reinforced ACM Oil Seals
Bearing Brand	for FAG and Timken (OE‑grade)
Oil Seal Type	Reinforced ACM high‑temperature seals
Condition	100% New \| Precision rebuild components
Warranty	12‑Month Replacement Warranty
Compatible OE Numbers	33127621206, 33121214080, 33121212464, 33121210724, 33121204232, 33121204231, 33107599466, 33107599467, 33107603747, 33107519925, 33107555315, 33107505603, 331075633769, 33131214856, 33107524319, 33107524325, 33107524324, 33107524322, 33107556795, 33107524318, 33107566170, 33107539776, 33107524322, 33107616972, 33107605588, 33107603748, 33107616971, 33107544868, 33101428165, 33107533136, 33107533138, 33107559330, 33107533148, 33107533140, 33101428167, 33107599470, 33107603746, 33107589482, 33107603750

Product Description

This rear differential rebuild kit is engineered for a wide range of BMW 1‑Series, 3‑Series, 4‑Series, X1, X3, and Z4 models. It features four OE‑grade bearings (for FAG & for Timken) and three ACM reinforced oil seals designed for high‑temperature, high‑load differential applications.

4× high‑strength bearings – OE‑grade for FAG & Timken
3× reinforced ACM oil seals – high‑temperature & pressure rated
Designed to restore smooth, quiet differential operation and eliminate oil leakage
Ideal for complete rebuilds or preventive maintenance of BMW differentials

Compatibility – Supported Vehicle Models & Years

for E81 116i, 118i, 120i (2004–2012)
for E87 116i, 118d, 118i, 120d, 120i (2004–2011)
for E82 120i (2007–2013)
for F20 114d, 114i, 116d, 116d ED, 116i, 118i, 118dx, 120i (2011–2018)
for F21 114d, 114i, 116d ED, 118i, 120i (2012–2018)
for F22 218i, 220i, 228i, 230iX (2014–2021)
for F23 218i, 220i, 228iX, 230iX (2014–2021)
for E46 316Ci, 316i, 316ti, 318Ci, 318i, 318ti, 320i (1998–2006)
for E90 316i, 318i, 320i, 323i (2005–2012)
for F30 316d, 316i, 320i, 320i ED, 328iX, 330iX (2012–2018)
for F31 316d, 316i, 320i, 320iX, 328iX, 330iX (2012–2018)
for F32 418i, 420i, 420iX, 428i, 430iX (2013–2020)
for E84 X1 18i (2009–2015)
for E83 X3 25i (2003–2010)
for G01 X3 20iX (2017–present)
for E85 Z4 20i, 25i (2003–2008)

⚠ Important – VIN / OE Number Confirmation Required:
This rebuild kit fits differential housings matching the OE numbers listed above.
Please confirm your vehicle’s OE reference or provide full VIN before purchasing.
Incorrect fitment due to unverified part numbers is the buyer’s responsibility.

Installation Notes

Ensure all old bearing races and seals are completely removed before installation.
Clean the differential housing thoroughly to avoid contamination from debris.
Use a correct press tool to install bearings; avoid hammering the bearings.
Install oil seals flush and evenly; do not tilt or over‑drive seal lips.
Lubricate seal lips with gear‑oil‑safe lubricant before assembly to avoid dry start.
Set preload and backlash according to factory specifications post‑assembly.
Use GL‑5 mechanical differential gear oil; friction‑modifier additives are not required.
Ensure the breather is not blocked to prevent pressure‑related oil leaks.
Torque all fasteners to OEM specifications using a calibrated torque wrench.
After installation, test drive briefly and inspect for abnormal noise or oil leakage.
Re‑check differential oil level after 50–100 km of driving.

Warranty & Support

12‑month warranty against manufacturing defects
Professional installation is strongly recommended
Warranty does not cover improper installation, misuse, or contamination damage