Description
Genuine BMW turbocharger air inlet sealing ring for M57 3.0L diesel engines
This is the large-diameter genuine BMW rubber sealing ring that seals the air intake ducting to the turbocharger inlet on M57 3.0 litre diesel engines. It is a critical sealing point on the intake side of the turbo — any leak here lets in unmetered air and immediately upsets fuelling and boost control.
Why replace this seal
The ring lives in a hot engine bay and hardens, shrinks and cracks over time. Common symptoms of a failed or tired inlet seal include:
- Loss of boost or sluggish power under load
- Whistling, hissing or sucking noise from the turbo inlet area
- Limp mode and boost-pressure or air-mass related fault codes
- Rough or uneven idle from unmetered air entering after the MAF sensor
- A visibly perished, split or distorted ring on removal
This is a single-use item. It should be replaced any time the turbocharger, intake ducting or air filter housing is removed — including during a turbo rebuild or an M57 engine swap. It is cheap insurance against chasing a boost leak later.
Specifications
| Part number | 13717799839 |
| Also listed as | 7799839 / 13-71-7-799-839 |
| Brand | Genuine BMW |
| Material | Moulded EPDM rubber |
| Weight | 34 g |
| Country of origin | Italy |
What's Included
- 1 x Genuine BMW turbocharger air inlet duct sealing ring
Vehicle Fitment
BMW M57N2 (306D5) 3.0 litre diesel engines, including:
3 Series
- E90 / E91 / E92 / E93 335d (including LCI)
5 Series
- E60 / E61 535d (including LCI)
X Series
- E70 X5 xDrive35d / 3.0sd
- E71 X6 xDrive35d
- E83 X3 3.0sd
Important Notes
- Please confirm the part number against your VIN before ordering — BMW revised intake components across the M57 production run.
- Some catalogues incorrectly list this part as an intake manifold gasket or crankcase breather seal. It is the large ring seal at the turbocharger air inlet.
- Single-use item — do not reuse an old seal after disturbing the turbo inlet.
- Genuine BMW part, sold individually.