MiMi Auto Parts
EXPANSION TANK WITH CAP, Moca

EXPANSION TANK WITH CAP

Brand: Moca

SKU: 400827

Category: COOLING, WATER BOTTLE

R1 377,70 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 Moca expansion tank with cap is a crucial component in your BMW's cooling system, designed to safely store and manage excess coolant as your engine heats up and cools down. The tank features robust plastic construction with reinforced ribs and multiple hose connection points to ensure secure integration with your vehicle's cooling circuit.

Compatible with BMW 1, 2, 3, and 4 Series models (F20-F36) equipped with B48, B58, or B46 engines from 2014 onwards, this expansion tank is engineered to meet the specific requirements of these vehicles. Always confirm your model, year, engine size, and engine code before ordering to ensure correct fitment.

Common symptoms of a failing expansion tank include visible coolant leaks, low coolant warnings, engine overheating, coolant odour inside or outside the vehicle, bubbling in the coolant reservoir, and fluctuating temperature gauge readings. You may also notice steam from under the bonnet or unexplained coolant loss.

Replace your expansion tank promptly if you notice any cracks, leaks, or cap failures, as these issues can lead to coolant loss and engine overheating. Regular inspection is recommended, especially if your vehicle is experiencing cooling system issues or has high mileage.

Trust MiMi Auto Parts for quality replacement cooling water bottles and expansion tanks for your BMW. We offer nationwide delivery throughout South Africa, making it easy to get the right part delivered to your door.

Common signs this part may need replacement

  • Coolant leaks near the expansion tank
  • Low coolant warning light
  • Engine overheating
  • Coolant odour inside or around the vehicle
  • Bubbling or gurgling sounds from the coolant reservoir
  • Fluctuating engine temperature
  • Visible cracks or damage on the tank
  • Steam from under the bonnet
  • Unexplained loss of coolant

Typical replacement guidance

Replace the expansion tank with cap if you observe leaks, cracks, or pressure cap failure, or if your BMW is experiencing recurring cooling issues. Timely replacement helps prevent engine overheating and avoids more costly repairs.

Why timely replacement matters

A damaged or leaking expansion tank can quickly lead to coolant loss and engine overheating, risking severe engine damage. Timely replacement ensures your BMW's cooling system remains sealed and operates efficiently.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 1 (F20) 2011 – 2019 120 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 1 (F20) 2011 – 2019 125 i (B48 B20 B) – 165 kW / 224 HP
  • BMW 1 (F20) 2011 – 2019 M 140 i (B58 B30 A) – 250 kW / 340 HP
  • BMW 1 (F21) 2011 – 2026 120 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 2 Convertible (F23) 2014 – 2026 220 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 2 Convertible (F23) 2014 – 2026 230 i (B46 B20 B|B48 B20 B) – 185 kW / 252 HP
  • BMW 2 Convertible (F23) 2014 – 2026 M 240 i (B58 B30 A) – 250 kW / 340 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 220 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 230 i (B46 B20 B|B48 B20 B) – 185 kW / 252 HP
  • BMW 2 Coupe (F22, F87) 2012 – 2026 M 240 i (B58 B30 A) – 250 kW / 340 HP
  • BMW 3 (F30, F80) 2011 – 2018 320 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 3 (F30, F80) 2011 – 2018 330 e (B48 B20 A) – 185 kW / 252 HP
  • BMW 3 (F30, F80) 2011 – 2018 330 i (B46 B20 B|B48 B20 B) – 185 kW / 252 HP
  • BMW 3 (F30, F80) 2011 – 2018 340 i (B58 B30 A) – 240 kW / 326 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 320 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 330 i (B48 B20 B) – 185 kW / 252 HP
  • BMW 3 Gran Turismo (F34) 2012 – 2026 340 i (B58 B30 A) – 240 kW / 326 HP
  • BMW 3 Touring (F31) 2012 – 2019 320 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 3 Touring (F31) 2012 – 2019 340 i (B58 B30 A) – 240 kW / 326 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 420 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 430 i (B48 B20 B) – 185 kW / 252 HP
  • BMW 4 Convertible (F33, F83) 2013 – 2026 440 i (B58 B30 A) – 240 kW / 326 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 420 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 430 i (B46 B20 B|B48 B20 B) – 185 kW / 252 HP
  • BMW 4 Coupe (F32, F82) 2013 – 2026 440 i (B58 B30 A) – 240 kW / 326 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 420 i (B48 B20 A) – 135 kW / 184 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 430 i (B48 B20 B) – 185 kW / 252 HP
  • BMW 4 Gran Coupe (F36) 2014 – 2026 440 i (B58 B30 A) – 240 kW / 326 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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