MiMi Auto Parts
HOSE WATERPUMP TO THERMOSTAT, Cooltec

HOSE WATERPUMP TO THERMOSTAT

Brand: Cooltec

SKU: 400201

Category: COOLING, RADIATOR HOSE

R609,50 incl. 15% VAT

✓ In stock, ships nationwide via The Courier Guy

Add to Cart

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

Product Description

This Cooltec hose connects the waterpump to the thermostat in your BMW's cooling system, playing a vital role in directing coolant flow between these key components. As part of the cooling radiator hose assembly, it is designed with robust moulded rubber sections and a central connector to ensure a secure, leak-resistant fit. Proper coolant circulation is essential for maintaining optimal engine temperature and preventing overheating.

This hose is compatible with select BMW models including the F20, F21, F22, F23, F30, F31, and F10 series, typically fitted to 125i, 320i, and 328i vehicles with the N20 engine. Always double-check your BMW's model, year, engine size, and engine code before purchasing to ensure correct fitment.

Common symptoms of a failing waterpump-to-thermostat hose include visible coolant leaks, bulging or soft hose sections, engine overheating, low coolant levels, and warning lights on the dashboard. You may also notice steam from the engine bay or a sweet smell from leaking coolant.

Replace this hose if you observe any cracks, leaks, or signs of deterioration. Regular inspection is recommended, especially on vehicles with higher mileage or after overheating incidents, to prevent costly engine damage.

MiMi Auto Parts offers this Cooltec cooling radiator hose with nationwide delivery across South Africa. Trust our expertise to help you find the right part for your BMW and keep your cooling system running reliably.

Common signs this part may need replacement

  • Coolant leaks near the waterpump or thermostat housing
  • Engine overheating
  • Bulging or soft hose sections
  • Low coolant level warning
  • Steam from the engine bay
  • Visible cracks or splits on the hose
  • Sweet smell of coolant
  • Dashboard temperature warning light
  • Coolant puddles under the vehicle

Typical replacement guidance

Replace the hose when you notice leaks, cracks, swelling, or softness, or during major cooling system repairs. Timely replacement helps prevent engine overheating and possible coolant loss.

Why timely replacement matters

A faulty waterpump-to-thermostat hose can lead to coolant leaks and engine overheating, risking serious engine damage. Replacing it promptly ensures reliable cooling and protects your engine.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 1 (F20) 2011 – 2019 125 i (N20 B20 A) – 160 kW / 218 HP
  • BMW 1 (F21) 2011 – 2026 125 i (N20 B20 A) – 160 kW / 218 HP
  • BMW 2 Convertible (F23) 2014 – 2026 220 i (N20 B20 A|N20 B20 B) – 135 kW / 184 HP
  • BMW 2 Convertible (F23) 2014 – 2026 228 i (N20 B20 A) – 180 kW / 245 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 220 i (N20 B20 A|N20 B20 B) – 135 kW / 184 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 228 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 3 (F30, F80) 2011 – 2018 320 i (N20 B20 A|N20 B20 B|N20 B20 D) – 135 kW / 184 HP
  • BMW 3 (F30, F80) 2011 – 2018 320 i xDrive (N20 B20 A|N20 B20 B) – 135 kW / 184 HP
  • BMW 3 (F30, F80) 2011 – 2018 328 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 3 (F30, F80) 2011 – 2018 328 i xDrive (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 328 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 3 Touring (F31) 2012 – 2019 320 i (N20 B20 B) – 135 kW / 184 HP
  • BMW 3 Touring (F31) 2012 – 2019 328 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 3 Touring (F31) 2012 – 2019 328 i xDrive (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 420 i (N20 B20 B) – 135 kW / 184 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 428 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 420 i (N20 B20 A|N20 B20 B) – 135 kW / 184 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 428 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 420 i (N20 B20 B) – 135 kW / 184 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 428 i (N20 B20 A|N26 B20 A) – 180 kW / 245 HP
  • BMW 5 (F10) 2009 – 2016 520 i (N20 B20 A|N20 B20 B) – 135 kW / 184 HP
  • BMW 5 (F10) 2009 – 2016 528 i (N20 B20 A) – 180 kW / 245 HP
  • BMW 5 Gran Turismo (F07) 2009 – 2017 528 i (N20 B20 A) – 180 kW / 245 HP
  • BMW 5 Touring (F11) 2009 – 2017 528 i (N20 B20 A) – 180 kW / 245 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.

Related Parts