ATE Brake Booster

Brake Booster Servo Unit - E46 323i, 325i 328i, 330i

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:20886

Part#: 34336779682

In Stock at Vendor

$ 284.99

This product was last offered at the strikethrough price on
04-23-2026

$ 284.08 USD

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$ 284.08 USD

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This ATE Brand brake booster is a direct replacement for the factory BMW vacuum assited brake booster servo unit on E46 3 series models.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi

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Brake Booster

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:594506

Part#: 34336779681

In Stock at Vendor

$ 297.96 USD

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$ 297.96 USD

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ATE Vacuum Pump - E82, E84, E90, E91, E92

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:1195882

Part#: 34336779721

Ships in 1 day

$ 402.99

This product was last offered at the strikethrough price on
05-07-2026

$ 391.99 USD

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$ 391.99 USD

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Replace your failed brake booster to restore braking power

ATE Brake Booster - E36

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:16441603

Part#: 34331162963

In Stock

$ 258.99 USD

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$ 258.99 USD

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Has your brake pedal become stiff and hard to depress, or goes right to the floor with no pressure or feel, most likely the brake booster unit has failed. Replace the brake booster right away to restore proper braking performance.

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ATE Power Brake Booster - E36

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T#:16441600

Part#: 34331162965

Back Ordered

$ 331.99 USD

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$ 331.99 USD

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Has your brake pedal become stiff and hard to depress, or goes right to the floor with no pressure or feel, most likely the brake booster unit has failed. Replace the brake booster right away to restore proper braking performance.

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ATE O-Ring - E10, E12, E21, E24, E28, E3, E30, E9

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T#:1196093

Part#: 34314650345

In Stock at Vendor

$ 4.99 USD

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$ 4.99 USD

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Seals the brake master cylinder to the power brake booster.

OE ATE Power Brake Booster - E23

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:19697

Part#: 34331152825

In Stock at Vendor

$ 1,511.99

This product was last offered at the strikethrough price on
05-07-2026

$ 1,468.99 USD

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$ 1,468.99 USD

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As you depress the brake pedal, your pedal linkage causes a shaft to move forward in response to your foot, and as this shaft moves forward, it interacts with the brake booster and master cylinder. The brake booster contains a diaphragm that separates its interior into two parts, with both in a partial vacuum. As the brake pedal is depressed, it causes a valve inside the booster to open, which in turn allows air into one side of the booster. This difference in pressure on one side helps to push the piston inside the brake master cylinder forward in response to the brake pedal, which in turn slows and stops your vehicle. If your brakes are feeling soft then it may be a good idea to replace your brake booster

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