MiMi Auto Parts
EXPANSION TANK, Moca

EXPANSION TANK

Brand: Moca

SKU: 409953

Category: COOLING, WATER BOTTLE

R885,50 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

The Moca Expansion Tank is an essential component of your BMW's cooling system, serving as the reservoir for excess coolant and helping to maintain the correct pressure and temperature within the engine. This cooling water bottle is designed to fit specific BMW models, providing reliable coolant storage and circulation. A properly functioning expansion tank helps prevent overheating and ensures smooth operation, especially under demanding driving conditions.

This expansion tank is compatible with select BMW models. To ensure a correct fit, please confirm your vehicle's model, year, engine size, and engine code before ordering. Correct fitment is crucial for optimal cooling system performance and to avoid unnecessary installation issues.

Common symptoms of a failing expansion tank include coolant leaks, low coolant warnings, overheating, visible cracks or discolouration on the reservoir, and frequent need to top up coolant. You may also notice unusual coolant smells or steam from under the bonnet, which can indicate a compromised tank.

If you experience any of these symptoms or notice visible damage to your expansion tank, it is important to replace it promptly. Ignoring these signs can lead to engine overheating and potential engine damage.

Order your Moca Expansion Tank from MiMi Auto Parts for peace of mind and reliable nationwide delivery across South Africa. Our team is here to assist you in selecting the correct part for your BMW.

Common signs this part may need replacement

  • Coolant leaks around the expansion tank
  • Low coolant warning on dashboard
  • Engine overheating
  • Visible cracks or discolouration on the reservoir
  • Frequent need to top up coolant
  • Coolant smell under the bonnet
  • Steam coming from the tank area
  • Bubbling or gurgling noises from the cooling system
  • Collapsed or swollen tank walls

Typical replacement guidance

Replace the expansion tank if you notice cracks, leaks, or persistent coolant loss. Timely replacement helps maintain proper cooling system pressure and prevents engine overheating.

Why timely replacement matters

A damaged expansion tank can lead to coolant loss and engine overheating, risking severe engine damage. Timely replacement keeps your BMW's cooling system functioning effectively.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 3 (E30) 1982 – 1992 320 i (M20 B20 (206EB)) – 92 kW / 125 HP
  • BMW 3 (E30) 1982 – 1992 320 i (M20 B20 (206KA)) – 95 kW / 129 HP
  • BMW 3 (E30) 1982 – 1992 323 i (M20 B23 (236EB)) – 102 kW / 139 HP
  • BMW 3 (E30) 1982 – 1992 323 i (M20 B23 (236EC)|M20 B23 (236EW)) – 110 kW / 150 HP
  • BMW 3 (E30) 1982 – 1992 325 i (M20 B25 (256E1)|M20 B25 (256E2)) – 126 kW / 171 HP
  • BMW 3 (E30) 1982 – 1992 325 i (M20 B25 (256E1)|M20 B25 (256E2)|M20 B25 (256EX)|M20 B25 (256K1)) – 125 kW / 170 HP
  • BMW 3 (E30) 1982 – 1992 325 i X (M20 B25 (256E1)|M20 B25 (256E2)|M20 B25 (256EX)|M20 B25 (256K1)) – 125 kW / 170 HP
  • BMW 3 (E30) 1982 – 1992 325 i X (M20 B25 (256E1)|M20 B25 (256E2)|M20 B25 (256EX)|M20 B25 (256K1)) – 126 kW / 171 HP
  • BMW 5 (E28) 1981 – 1987 520 i (M20 B20 (206EA)|M20 B20 (206EB)|M20 B20 (206EC)|M20 B20 (206EZ)) – 92 kW / 125 HP
  • BMW 5 (E28) 1981 – 1987 520 i (M20 B20 (206KA)) – 95 kW / 129 HP
  • BMW 5 (E28) 1981 – 1987 525 e (M20 B27 (276EA)) – 92 kW / 125 HP
  • BMW 5 (E28) 1981 – 1987 525 e (M20 B27 (276EB)|M20 B27 (276KB)) – 95 kW / 129 HP
  • BMW 5 (E28) 1981 – 1987 525 e (M20 B27 (276KA)|M20 B27 (276KB)) – 90 kW / 122 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