How to remove and install the differential seal on the pinion flange of a BMW 330i?

This procedure applies to both the front (AWD models) and rear differential. Removal: Remove the driveshaft and the exhaust system. Remove the retaining plate and make alignment marks between the driveshaft flange nut, the differential pinion flange, and pinion. Discard the retaining plate; a new one must be used during installation. Hold the differential pinion flange stationary by bolting a length of metal bar to it. Unscrew the nut, noting the exact number of turns necessary to remove it. Using a suitable puller, draw the differential pinion flange from the pinion and remove the dust cover. If the dust cover shows signs of wear, replace it. Pry the oil seal from the differential case with a screwdriver. Wipe the oil-seal seating surface clean. Installation: Smear a little differential oil on the sealing lip of the new oil seal, then press it squarely into the differential case until it is flush with the outer face. If necessary, tap the seal into position using a metal tube that only bears on its hard outer edge. Install the dust cover and place the differential pinion flange on the pinion, aligning the marks made during removal. Replace the flange nut, screwing it on by the exact number of turns counted during removal, so that all alignment marks align. Caution: Do not overtighten the flange nut. If the nut is overtightened, the collapsible spacer behind the flange will be deformed, requiring its replacement. This is a complex operation that requires the rear differential to be disassembled. Secure the nut in position with the new retaining plate, tapping it squarely into position.

Genuine BMW 330i Differential Seal

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10 Differential Seals found

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BMW 330i Shaft Seal
Part Number: 31507609535
$14.45 MSRP: $18.20
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Product Specifications
- Replaces: 33-10-1-214-099, 33-12-1-203-811, 33-12-1-212-461
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2024 BMW 330i | 4 Cyl 2.0 L GAS
- 2017-2020 BMW 330i | Sedan(F30), Sedan(G20)
- 2001-2006 BMW 330i | Sedan(E46), Sedan(E90)
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BMW 330i Shaft Seal With Lock Ring
Part Number: 33107505604
$14.45 MSRP: $18.20
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Product Specifications
- Replaces: 33-13-1-214-322
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW 330i | Sedan(E46), Sedan(E90)
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BMW 330i Shaft Seal
Part Number: 33107609536
$14.45 MSRP: $18.20
You Save: $3.75 (21%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 33-10-1-213-412, 33-12-1-214-443
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2025 BMW 330i | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), Sedan(G20)
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BMW 330i SEALING KIT REAR AXLE DIFFER
Part Number: 33108860346
$77.64 MSRP: $96.58
You Save: $18.94 (20%)
Ships in 1-2 Business Days
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Product Specifications
- Replaces: 33-10-7-564-416
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2017-2025 BMW 330i | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), Sedan(F30), Sedan(G20)
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BMW 330i SEALING KIT REAR AXLE DIFFER
Part Number: 33108860348
$77.64 MSRP: $96.58
You Save: $18.94 (20%)
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Product Specifications
- Position: Rear
- Replaces: 33-10-7-568-368
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2025 BMW 330i | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), Sedan(G20)
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BMW 330i Gasket Set Differential
Part Number: 33107564416
$77.64 MSRP: $96.58
You Save: $18.94 (20%)
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Product Specifications
- Replaced by: 33108860346
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2017-2020 BMW 330i | Sedan(F30), Sedan(G20)
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BMW 330i Gasket Set Differential
Part Number: 33107568368
$77.64 MSRP: $96.58
You Save: $18.94 (20%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 33108860348
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2020 BMW 330i | Sedan(G20)
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BMW 330i DUST GUARD RING, PLASTIC
Part Number: 33205A318F8
$14.61 MSRP: $17.85
You Save: $3.24 (19%)
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Product Specifications
- Replaces: 33-21-9-884-746, 33-21-8-740-848, 33-21-7-616-459
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2019-2025 BMW 330i | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), Sedan(G20)
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BMW 330i DUST GUARD RING, PLASTIC
Part Number: 33205A31900
$14.61 MSRP: $17.85
You Save: $3.24 (19%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaces: 33-21-7-616-458, 33-21-8-740-847
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2017-2025 BMW 330i | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), Sedan(F30), Sedan(G20)
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BMW 330i Gasket Set Differential
Part Number: 33107530427
Product Specifications
- Other Name: Gasket Kit
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2006 BMW 330i | Sedan(E90)

BMW 330i Differential Seal

BMW's 330i Differential Seal serves the rear axle. Its primary function is to keep the gear oil in and contaminants and dirt out. This enables the efficient transfer of torque from the driveshaft to the rear wheels. With the help of this component, the rear wheels can spin at different speeds without any problem. Many 330i rear axles are equipped with a Differential Seal that resists more than just pressure. Heat and moisture are no match for it. So, lubricant stays put and grit stays away. The Differential Seal maintains a constant film of 75W-90 gear oil to avoid gear clatter in the BMW rear housing due to an open or limited slip differential running low on fluid. Earlier versions of the 330i typically utilized an open diff along with a simple rubber Differential Seal. On the other hand, later trims that transitioned to a limited slip unit were equipped with a more robust synthetic-rubber blend. This upgrade was meant to withstand the extra heat from the clutch pack. The primary distinction between these two seals lies in their ability to deal with high temperatures and their extended service life. BMW engineers specified scheduled inspections every 3,000 miles. A leaking Differential Seal can quickly drain oil, create whining noises, and make the differential work much harder.

If you are looking for OEM BMW 330i Differential Seal, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW 330i Differential Seal that come backed by the manufacturer's warranty.

BMW 330i Differential Seal Parts Questions & Experts Answers

Shaft Seal
31507609535
Q:
How to remove and install the differential seal on the pinion flange of a BMW 330i?
Posted by Misty H.
A:
This procedure applies to both the front (AWD models) and rear differential. Removal: Remove the driveshaft and the exhaust system. Remove the retaining plate and make alignment marks between the driveshaft flange nut, the differential pinion flange, and pinion. Discard the retaining plate; a new one must be used during installation. Hold the differential pinion flange stationary by bolting a length of metal bar to it. Unscrew the nut, noting the exact number of turns necessary to remove it. Using a suitable puller, draw the differential pinion flange from the pinion and remove the dust cover. If the dust cover shows signs of wear, replace it. Pry the oil seal from the differential case with a screwdriver. Wipe the oil-seal seating surface clean. Installation: Smear a little differential oil on the sealing lip of the new oil seal, then press it squarely into the differential case until it is flush with the outer face. If necessary, tap the seal into position using a metal tube that only bears on its hard outer edge. Install the dust cover and place the differential pinion flange on the pinion, aligning the marks made during removal. Replace the flange nut, screwing it on by the exact number of turns counted during removal, so that all alignment marks align. Caution: Do not overtighten the flange nut. If the nut is overtightened, the collapsible spacer behind the flange will be deformed, requiring its replacement. This is a complex operation that requires the rear differential to be disassembled. Secure the nut in position with the new retaining plate, tapping it squarely into position.
Answered by BMW Parts Specialist Javier / Apr 30, 2024

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