MiMi Auto Parts
CAP EXPANSION TANK 2.0BAR, Moca

CAP EXPANSION TANK 2.0BAR

Brand: Moca

SKU: 400042

Category: COOLING, PRESSURE CAP

R117,30 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

Ensure your BMW’s cooling system maintains optimal pressure with the Moca CAP EXPANSION TANK 2.0BAR, designed specifically for BMW models. This cooling pressure cap securely seals the expansion tank, helping to keep coolant under the correct pressure and prevent overheating. Its robust construction and integrated pressure relief component help safeguard your engine against coolant loss and excessive pressure build-up.

This cap is suitable for a range of BMW vehicles, including various models from the E36, E46, E53, E34, E39, Z3 E36, E32, and E38 series. To ensure correct fitment, always confirm your vehicle’s model, year, engine size, and engine code before purchasing.

Common signs of a faulty expansion tank cap include coolant leaks around the cap, overheating, low coolant warning lights, or visible damage to the cap itself. You might also notice a hissing sound from the cap area or coolant escaping under pressure.

Replace the expansion tank cap if you notice any symptoms of failure, physical damage, or after a cooling system service. A worn or faulty cap can compromise cooling system pressure and lead to engine overheating.

Shop with confidence at MiMi Auto Parts, your trusted supplier of BMW cooling components. We offer nationwide delivery throughout South Africa for your convenience.

Common signs this part may need replacement

  • Coolant leaks around expansion tank
  • Engine overheating
  • Low coolant warning light
  • Visible cracks or damage on cap
  • Coolant escaping under pressure
  • Hissing sound near cap
  • Loss of coolant without visible leaks
  • Pressure build-up in coolant hoses

Typical replacement guidance

Replace the expansion tank cap if you notice coolant leaks, pressure loss, or visible damage. It is also a good practice to replace the cap during major cooling system maintenance or if the cap fails a pressure test.

Why timely replacement matters

A properly functioning cooling pressure cap maintains the correct system pressure, preventing overheating and coolant loss. Timely replacement helps protect your engine from costly damage.

Vehicle Compatibility

This part is confirmed to fit the following vehicles:

  • BMW 3 (E30) 1982 – 1992 318 is (M42 B18 (184S1)) – 100 kW / 136 HP
  • BMW 3 (E36) 1990 – 1998 318 i (M43 B18 (184E2)) – 85 kW / 115 HP
  • BMW 3 (E36) 1990 – 1998 318 is (M42 B18 (184S1)) – 103 kW / 140 HP
  • BMW 3 (E36) 1990 – 1998 318 is (M44 B19 (194S1)) – 103 kW / 140 HP
  • BMW 3 (E36) 1990 – 1998 320 i (M50 B20 (206S1)|M50 B20 (206S2)|M52 B20 (206S3)) – 110 kW / 150 HP
  • BMW 3 (E36) 1990 – 1998 323 i (M52 B25 (256S3)) – 125 kW / 170 HP
  • BMW 3 (E36) 1990 – 1998 325 i (M50 B25 (256S1)|M50 B25 (256S2)) – 141 kW / 192 HP
  • BMW 3 (E36) 1990 – 1998 328 i (M52 B28 (286S1)) – 142 kW / 193 HP
  • BMW 3 (E36) 1990 – 1998 M3 3.2 (S50 B32 (326S1)) – 236 kW / 321 HP
  • BMW 3 (E46) 1997 – 2005 318 i (M43 B19 (194E1)) – 87 kW / 118 HP
  • BMW 3 (E46) 1997 – 2005 318 i (N42 B20 A|N46 B20 A|N46 B20 C) – 105 kW / 143 HP
  • BMW 3 (E46) 1997 – 2005 320 d (M47 D20 (204D1)) – 100 kW / 136 HP
  • BMW 3 (E46) 1997 – 2005 320 i (M52 B20 (206S4)) – 110 kW / 150 HP
  • BMW 3 (E46) 1997 – 2005 320 i (M54 B22 (226S1)) – 125 kW / 170 HP
  • BMW 3 (E46) 1997 – 2005 323 i (M52 B25 (256S4)) – 125 kW / 170 HP
  • BMW 3 (E46) 1997 – 2005 325 i (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 3 (E46) 1997 – 2005 328 i (M52 B28 (286S2)) – 142 kW / 193 HP
  • BMW 3 Compact (E36) 1994 – 2000 316 g (M43 B16 (164E2)) – 75 kW / 102 HP
  • BMW 3 Compact (E36) 1994 – 2000 323 ti (M52 B25 (256S3)) – 125 kW / 170 HP
  • BMW 3 Compact (E46) 2001 – 2004 318 ti (N42 B20 A|N46 B20 A) – 105 kW / 143 HP
  • BMW 3 Compact (E46) 2001 – 2004 325 ti (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 3 Convertible (E36) 1993 – 1999 318 i (M43 B18 (184E2)) – 85 kW / 115 HP
  • BMW 3 Convertible (E36) 1993 – 1999 320 i (M50 B20 (206S2)|M52 B20 (206S3)) – 110 kW / 150 HP
  • BMW 3 Convertible (E36) 1993 – 1999 323 i (M52 B25 (256S3)) – 125 kW / 170 HP
  • BMW 3 Convertible (E36) 1993 – 1999 325 i (M50 B25 (256S2)) – 141 kW / 192 HP
  • BMW 3 Convertible (E36) 1993 – 1999 328 i (M52 B28 (286S1)) – 142 kW / 193 HP
  • BMW 3 Convertible (E36) 1993 – 1999 M3 3.2 (S50 B32 (326S1)) – 236 kW / 321 HP
  • BMW 3 Convertible (E46) 2000 – 2007 318 Ci (N42 B20 A|N46 B20 A) – 105 kW / 143 HP
  • BMW 3 Convertible (E46) 2000 – 2007 323 Ci (M52 B25 (256S4)) – 125 kW / 170 HP
  • BMW 3 Convertible (E46) 2000 – 2007 325 Ci (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 3 Convertible (E46) 2000 – 2007 330 Ci (M54 B30 (306S3)) – 170 kW / 231 HP
  • BMW 3 Convertible (E46) 2000 – 2007 M3 (S54 B32 (326S4)) – 252 kW / 343 HP
  • BMW 3 Coupe (E36) 1991 – 1999 318 is (M42 B18 (184S1)) – 103 kW / 140 HP
  • BMW 3 Coupe (E36) 1991 – 1999 320 i (M50 B20 (206S1)|M50 B20 (206S2)|M52 B20 (206S3)) – 110 kW / 150 HP
  • BMW 3 Coupe (E36) 1991 – 1999 323 i (M52 B25 (256S3)) – 125 kW / 170 HP
  • BMW 3 Coupe (E36) 1991 – 1999 325 i (M50 B25 (256S1)|M50 B25 (256S2)) – 141 kW / 192 HP
  • BMW 3 Coupe (E36) 1991 – 1999 328 i (M52 B28 (286S1)) – 142 kW / 193 HP
  • BMW 3 Coupe (E36) 1991 – 1999 M3 3.0 (S50 B30 (306S1)) – 210 kW / 286 HP
  • BMW 3 Coupe (E36) 1991 – 1999 M3 3.2 (S50 B32 (326S1)) – 236 kW / 321 HP
  • BMW 3 Coupe (E46) 1998 – 2006 318 Ci (N42 B20 A) – 105 kW / 143 HP
  • BMW 3 Coupe (E46) 1998 – 2006 323 Ci (M52 B25 (256S4)) – 125 kW / 170 HP
  • BMW 3 Coupe (E46) 1998 – 2006 325 Ci (M54 B25 (256S5)) – 141 kW / 192 HP
  • BMW 3 Coupe (E46) 1998 – 2006 328 Ci (M52 B28 (286S2)) – 142 kW / 193 HP
  • BMW 3 Coupe (E46) 1998 – 2006 330 Ci (M54 B30 (306S3)) – 170 kW / 231 HP
  • BMW 3 Coupe (E46) 1998 – 2006 M3 (S54 B32 (326S4)) – 252 kW / 343 HP
  • BMW 3 Coupe (E46) 1998 – 2006 M3 CSL (S54 B32 (326S4)) – 265 kW / 360 HP
  • BMW 3 Touring (E36) 1995 – 1999 318 i (M43 B18 (184E2)) – 85 kW / 116 HP
  • BMW 3 Touring (E36) 1995 – 1999 320 i (M52 B20 (206S3)) – 110 kW / 150 HP
  • BMW 3 Touring (E36) 1995 – 1999 323 i (M52 B25 (256S3)) – 125 kW / 170 HP
  • BMW 3 Touring (E36) 1995 – 1999 328 i (M52 B28 (286S1)) – 142 kW / 193 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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