MiMi Auto Parts
HOSE EXP TANK TO TOP RADIATOR HOSE, Cooltec

HOSE EXP TANK TO TOP RADIATOR HOSE

Brand: Cooltec

SKU: 400812

Category: COOLING, RADIATOR HOSE

R227,70 incl. 15% VAT

✓ In stock, ships nationwide via The Courier Guy

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Fitment: Fits selected BMW models. Confirm exact fitment before ordering.

Product Description

This Cooltec hose connects the expansion tank to the top radiator hose in your BMW's cooling system. It is engineered to ensure proper coolant flow between the expansion tank and radiator, helping to regulate engine temperature and prevent overheating. The hose features robust plastic connectors, one with a 90-degree elbow and the other straight, designed for a secure fit and reliable performance in demanding engine conditions.

This part is compatible with various BMW 1, 2, 3, and 4 Series models, including F20 to F36 body styles and engines ranging from 114d to 435d, as well as M135i to 435i. Always confirm your vehicle's model, year, engine size, and engine code before ordering to ensure the correct fitment.

Common symptoms of a failing expansion tank to radiator hose include coolant leaks, low coolant warnings, visible cracks or swelling on the hose, engine overheating, steam from the engine bay, and persistent low coolant levels. You may also notice engine temperature fluctuations or a sweet smell from leaking coolant.

It is advisable to replace this hose at the first sign of wear, damage, or coolant leakage. Regular inspection during cooling system maintenance can help prevent sudden failures and costly engine repairs.

Order your replacement hose from MiMi Auto Parts for reliable service and nationwide delivery across South Africa. Trust our team to help you find the right part for your BMW and keep your cooling system running smoothly.

Common signs this part may need replacement

  • Coolant leaks near the expansion tank or radiator
  • Low coolant warning light on dashboard
  • Engine overheating
  • Visible cracks, swelling, or soft spots on the hose
  • Persistent low coolant levels
  • Steam or vapour from the engine bay
  • Coolant smell inside or around the vehicle
  • Temperature gauge fluctuating abnormally

Typical replacement guidance

Replace the expansion tank to top radiator hose if you notice leaks, visible damage, or signs of aging such as cracks or swelling. Timely replacement helps prevent coolant loss and engine overheating, especially in high-performance or older BMW models.

Why timely replacement matters

A compromised hose can lead to coolant leaks and engine overheating, risking serious engine damage. Replacing this hose promptly helps maintain proper cooling system pressure and reliable engine operation.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 1 (F20) 2011 – 2019 120 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 1 (F20) 2011 – 2019 M 135 i (N55 B30 A) – 235 kW / 320 HP
  • BMW 1 (F20) 2011 – 2019 M 135 i (N55 B30 A) – 240 kW / 326 HP
  • BMW 1 (F21) 2011 – 2026 M 135 i (N55 B30 A) – 235 kW / 320 HP
  • BMW 1 (F21) 2011 – 2026 M 135 i (N55 B30 A) – 240 kW / 326 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 M 235 i (N55 B30 A) – 240 kW / 326 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 M2 (N55 B30 A) – 272 kW / 370 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 M2 CS (S55 B30 A) – 331 kW / 450 HP
  • BMW 3 (F30, F80) 2011 – 2018 320 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 3 (F30, F80) 2011 – 2018 335 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 3 (F30, F80) 2011 – 2018 ActiveHybrid (N55 B30 A) – 250 kW / 340 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 320 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 335 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 3 Touring (F31) 2012 – 2019 320 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 3 Touring (F31) 2012 – 2019 335 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 420 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 435 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 420 d (B47 D20 A|N47 D20 C) – 120 kW / 163 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 420 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 420 d (N47 D20 C) – 147 kW / 200 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 435 d xDrive (N57 D30 B) – 230 kW / 313 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 435 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 420 d (B47 D20 A|N47 D20 C) – 120 kW / 163 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 420 d (N47 D20 C) – 135 kW / 184 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 420 d (N47 D20 C) – 147 kW / 200 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 435 i (N55 B30 A) – 225 kW / 306 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 435 i (N55 B30 A) – 250 kW / 340 HP

Fitment support

Not sure if this part fits your vehicle? Contact MiMi Auto Parts with your vehicle make, model, year, and engine code before ordering and we will help confirm fitment.

Installation note

Cooling system work involves draining and refilling coolant and may require specialised tools. Professional installation is recommended to ensure correct coolant mixture, bleeding of air from the system, and leak-free connections.

Frequently Asked Questions

What are the signs of a failing water pump?

Common signs may include coolant leaks near the front of the engine, engine overheating, a whining or grinding noise from the water pump area, or coolant loss without visible external leaks. Diagnosis should be confirmed before replacement.

Can I drive with a coolant leak?

Driving with a coolant leak is not recommended. Loss of coolant can lead to engine overheating and potentially serious engine damage. The vehicle should be inspected and the leak repaired before further driving.

Does this part fit my vehicle?

Please check the vehicle compatibility section on this page and confirm your vehicle make, model, year, engine size, and engine code before ordering. If you are unsure, contact MiMi Auto Parts before checkout.

Is the price VAT-inclusive?

Yes, product prices on MiMi Auto Parts are shown inclusive of VAT where applicable.

Do you deliver across South Africa?

Yes, MiMi Auto Parts delivers nationwide in South Africa. Delivery cost and estimated timing are calculated during checkout based on your location.

Is professional installation recommended?

Professional installation is recommended for safety-critical and technical parts such as airbag, clock spring, brakes, suspension, steering, clutch, cooling, engine, and electrical components. For guidance specific to this part, see the installation note on this page.

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