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Bmw 335Is Turbocharger Vacuum Reservoirs

Bmw 335Is Turbocharger vacuum reservoirs

Starting at $49.95, AutoBuffy stocks 1 turbocharger vacuum reservoirs from URO. This small canister stores vacuum pressure that actuates the turbo's wastegate or boost control solenoid. When it cracks, collapses, or loses its check valve, boost pressure becomes erratic, the engine falls into limp mode, and turbo response suffers immediately.

Signs your Bmw 335Is needs a new turbocharger vacuum reservoir

  • Sluggish or delayed turbo spool — the wastegate opens too early or at the wrong time due to lost vacuum signal
  • Boost pressure that spikes, drops, or swings unpredictably under acceleration
  • Persistent check-engine light with codes related to boost control, wastegate position, or boost pressure below target
  • Engine enters limp mode under load, cutting power to protect itself from uncontrolled boost
  • Audible hissing or sucking noise from the vacuum line area near the turbo or firewall under boost
  • Visible cracks, collapsed walls, or a soft, deformed canister body when inspected under the hood

Which turbocharger vacuum reservoir should you buy for your Bmw 335Is?

The main decision is whether to match the OE material and geometry exactly or upgrade to a more durable aftermarket unit. Fit is critical — the reservoir must hold the correct volume and accept the same port sizes as your factory lines. Confirm the number of ports (typically one or two) and the mounting bracket style before ordering.

OE-Equivalent Replacement
Best for
Restoring factory boost control behavior on a stock Bmw 335Is
What you get
Correct volume, port count, and bracket position; direct bolt-in with no line modification
OEM-Sourced Part
Best for
Owners who want the exact factory specification and longest confirmed fitment
What you get
Manufacturer-stamped part, tightest tolerances, typically the highest price point
Upgraded Aluminum Canister
Best for
High-mileage or performance builds where plastic cracking is a recurring issue
What you get
Corrosion-proof construction, higher pressure rating, longer service life under heat cycles
Universal Inline Reservoir
Best for
Custom or modified turbo setups where the factory location is no longer usable
What you get
Adjustable volume, generic port fittings, requires custom bracket and line routing

Turbocharger vacuum reservoirs brands we stock for your Bmw 335Is

URO
1 option · from $49.95

Replacing a turbocharger vacuum reservoir on a Bmw 335Is

Easy⏱ 30–60 minutesHand vacuum pump with gaugeFlathead screwdriver or hose-clamp pliersSocket set and ratchetTrim panel removal tool (if reservoir is behind a cover)Marker or masking tape for labeling vacuum lines

Label every vacuum line before disconnecting so each one returns to the correct port on the new reservoir. Release the mounting bracket fasteners, swap the canister, and reconnect the lines, ensuring each hose seats fully with no kinks. After installation, run the engine and verify with a scan tool that boost targets are met and no codes return.

Frequently asked questions

How much does it cost to replace turbocharger vacuum reservoirs on a Bmw 335Is?
Parts start at $49.95 for an OE-equivalent reservoir at AutoBuffy. DIY total cost is usually just the part plus any replacement vacuum line if the existing hose is brittle. Shop labor is minimal — typically under an hour — so total out-of-pocket with a mechanic is modest compared to most turbo repairs.
Can I drive my Bmw 335Is with a faulty turbocharger vacuum reservoir?
You can drive short distances, but it is not advisable. A failed reservoir causes uncontrolled wastegate behavior, which can produce over-boost or under-boost conditions. Over-boost risks engine damage; sustained under-boost and repeated limp-mode events put stress on related turbo components. Replace it promptly to avoid a larger repair bill.
How do I test a turbocharger vacuum reservoir before replacing it?
Disconnect the reservoir from the vehicle and apply hand-vacuum with a vacuum pump. A good reservoir holds steady vacuum with no decay. If vacuum bleeds down within seconds, the canister or its internal check valve has failed. Also inspect all ports and the body for hairline cracks that appear only under light flex.
Does the turbocharger vacuum reservoir need to be replaced with the check valve, or are they separate?
On many Bmw 335Is applications the check valve is integrated into the reservoir body and is not serviceable separately. If the check valve has failed, the entire reservoir assembly should be replaced. Some aftermarket kits include a separate inline check valve, which can be useful if the new canister does not include one.
How long does a turbocharger vacuum reservoir last on a Bmw 335Is?
Plastic reservoirs typically last many years under normal conditions, but heat cycling near the turbo, oil contamination, and age-related embrittlement shorten that window. Vehicles in hot climates or with high-performance tunes often see earlier failures. Inspect the canister and its lines whenever doing other turbo or boost system service.
Will a cracked vacuum reservoir throw a specific diagnostic code on a Bmw 335Is?
Yes. Common codes include boost pressure below threshold, boost control solenoid performance, and wastegate position rationality faults. However, these codes can also point to a failed solenoid, torn boost hose, or faulty wastegate actuator. Confirm the reservoir is the source by performing a vacuum-hold test before replacing other components.

Shop turbocharger vacuum reservoirs by year for the Bmw 335Is

201320122011

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