1 1

BMW

Genuine BMW N55 Turbocharger Coolant Return Pipe/Line Hose | OEM 11537583903 | Fits M2, 135i, M135i, M235i, 335i, 435i, 535i, 640i, 740i, X1, X3, X4, X5, X6

Genuine BMW N55 Turbocharger Coolant Return Pipe/Line Hose | OEM 11537583903 | Fits M2, 135i, M135i, M235i, 335i, 435i, 535i, 640i, 740i, X1, X3, X4, X5, X6

£40.52
£42.00 £40.52
Sale Sold out
Shipping calculated at checkout.

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 N55 Turbocharger Water Return Hose | Part Number 11537583903

Restore dependable cooling to your turbocharged straight-six with this factory original BMW turbo water return hose, part number 11537583903. Designed for the N55 engine family, this genuine BMW cooling circuit pipe routes coolant away from the turbocharger for stable temperatures, leak-free operation and long-term reliability. Ideal for owners chasing a permanent fix for drips, weeping joints or brittle hardlines on performance models like M2, 135i, M135i, M235i, 335i, 435i, 535i, 640i, 740i and X Series.

We choose OE BMW hardware for perfect alignment and dependable sealing. We have installed this turbocharger water outlet line on our own builds and many customer cars and the fit is spot on. No headaches, no improvising, just the right part that cures coolant loss and protects your turbo on fast road and track.

Why this genuine BMW hose is the smart choice

  • Direct-fit replacement engineered by BMW for the N55 straight-six
  • Correct routing and geometry to prevent kinks and chafing
  • Maintains stable turbo temperatures for performance and longevity
  • Proven durability under heat cycling and boost
  • Great preventative maintenance when refreshing the cooling system or replacing a turbo

Symptoms that point to a failing turbo water outlet line

  • Sweet coolant smell near the hot side or visible pink/green residue around the turbo
  • Hardened plastic, hairline cracks or flattened hose sections
  • Intermittent overheating after spirited driving
  • Recent turbo swap with an old hose refitted

Suits the following BMW models with the N55 engine

Compatible with a wide range of E and F Series vehicles using the N55 single-turbo inline-six. If in doubt, contact us with your VIN for verification.

1 Series

  • E82 and E88 135i
  • F20 and F21 M135i including xDrive

2 Series

  • F22 and F23 M235i including xDrive
  • F87 M2 pre-LCI and LCI

3 Series

  • E90, E91, E92, E93 335i including xDrive
  • F30, F31, F34 335i including xDrive and Hybrid 3

4 Series

  • F32, F33, F36 435i including xDrive

5 Series

  • F07 5 Series GT 535i including xDrive
  • F10, F11 535i including xDrive and Hybrid 5

6 Series

  • F06 Gran Coupe, F12, F13 640i including xDrive

7 Series

  • F01, F02 740i, 740Li including xDrive and Hybrid 7

X Models

  • E84 X1 35i xDrive
  • F25 X3 35i xDrive
  • F26 X4 35i xDrive and M40i
  • E70 LCI X5 35i and 40i xDrive
  • F15 X5 35i and 35i xDrive
  • E71 X6 35i and 40i xDrive
  • F16 X6 35i and 35i xDrive

Part number

11537583903

Manufacturer

BMW Genuine Part

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or workshop availability, email info@mjmodifications.co.uk.

Compatibility check

We verify fitment before dispatch. Add your UK registration or the last seven of your VIN at checkout for peace of mind.

Warranty

Two-year manufacturer warranty for UK customers and one year for international customers when a VIN is supplied and the part is used on compatible vehicles.

Popular search terms

N55 turbo water return hose, turbocharger coolant outlet line, BMW water return pipe to turbo, OE BMW cooling return tube, BMW part 11537583903, N55 turbo water pipe replacement, M2 turbo water line, F20 F21 M135i coolant outlet hose, F22 F23 M235i turbo water return, F30 F31 335i cooling return pipe, F32 F33 F36 435i turbo coolant tube, F10 F11 535i turbo water outlet, 640i turbo coolant discharge pipe, 740i N55 water return, X1 X3 X4 X5 X6 turbo water line, genuine BMW N55 cooling hose, replacement turbo water outlet for N55.

Order with confidence. This is the correct BMW OE component for a robust, leak-free fix that keeps your N55-powered BMW running cool and performing at its best.

View full details