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BMW

Genuine BMW Intercooler Left-Side Gasket Ring M47/N47 Diesel (Charge Air Cooler Seal) – OEM O-Ring – 11617791235 – Fits 120d 320d 330d 520d X3 2.0d

Genuine BMW Intercooler Left-Side Gasket Ring M47/N47 Diesel (Charge Air Cooler Seal) – OEM O-Ring – 11617791235 – Fits 120d 320d 330d 520d X3 2.0d

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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

BMW Diesel Boost Pipe O‑Ring Left Side. OE 11617791235

Stop boost loss and keep your torque strong with this original BMW left-hand cooler coupling ring for M47 and N47 engines. This pressure pipe seal sits on the left side of the air-to-air cooler, giving a tight, rattle-free connection that helps prevent oily residue at the joint, restores response, and protects fuel economy. We fit these on our own builds and customer cars with excellent long-term results.

Part number: 11617791235. Shown as item 7 in the factory diagram.

Why this OE seal is the smart choice

  • Exact BMW fit for the left-hand intercooler connection on M47 and N47 diesel platforms
  • Proper material spec to handle heat cycles, vibration and boost pressure
  • Quick, low-cost fix for whistle, soft boost, or oil mist around the cooler joint
  • Direct swap for flattened, hardened or torn rings
  • Keeps intake tract airtight which supports power, MPG and reliability

Typical symptoms this ring cures

  • Hiss under load or light smoke from the bay
  • Sluggish midrange or hesitant throttle
  • Oil staining where the left cooler pipe meets the core
  • Repeated boost leak codes after refitting pipes

Compatible BMW models using M47 and N47 diesel engines

If you are unsure, we can confirm fitment before dispatch. Send your UK reg or last 7 of VIN at checkout.

  • 1 Series E81, E82, E87, E88
    • 116d, 118d, 120d
  • 3 Series E46
    • 318d, 318td, 320d, 320td, 320Cd, 330d, 330Cd, 330xd
  • 3 Series E90, E91 including LCI
    • 316d, 318d, 320d
  • 5 Series E60, E61
    • 520d
  • X1 E84
    • 16d, 18d, xDrive 18d
  • X3 E83 including LCI
    • 2.0d, 3.0d

Fitment help and installation

We offer a free compatibility check before shipping. Enter your registration or last 7 of VIN at checkout.

Want professional fitting. Book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Warranty

UK customers: two year manufacturer warranty. International customers: one year manufacturer warranty when VIN is supplied for a verified application.

What our customers say

We use this OE seal in-house and customer feedback is consistently positive. Tight fit, no more weeping joints, and boost back to where it should be.

BMW M47 N47 left intercooler connection O‑ring OE 11617791235

Search-friendly terms

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