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BMW Coolant Expansion Tanks for BMW F83 M4 S55 3.0L

On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.

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Blackline Performance Coolant Expansion Tank Cap Cover - BMW M - Red ...

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T#:641289

Part#: FXXCET-R

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$ 65.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Blackline Performance Coolant Expansion Tank Cap Cover - BMW M - Blue...

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T#:5691129

Part#: FXXCET-B

In Stock

$ 65.00 USD

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Qty

$ 65.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired blue color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in a variety of M vehicles(check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Blackline Performance Chargecooler Coolant Tank Cap Cover - Red - BMW...

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T#:641287

Part#: FXXCCT-R

In Stock

$ 52.00 USD

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$ 52.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Charge Cooler Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Charge Cooler Reservoir Cap Cover will fit most BMW vehicles equipped with the S55 and S63 engines with the charge cooler reservoir tank found in the following vehicles: F87 M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more. Check your coolant cap ensuring that it is the same shape as seen in the product photos. Each kit comes with a Billet Charge Cooler Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Blackline Performance Chargecooler Coolant Tank Cap Cover - Blue - BM...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:5691131

Part#: FXXCCT-B

In Stock

$ 52.00 USD

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Qty

$ 52.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Charge Cooler Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired blue color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Charge Cooler Reservoir Cap Cover will fit most BMW vehicles equipped with the S55 and S63 engines with the charge cooler reservoir tank found in a variety of M Vehicles. Check your coolant cap ensuring that it is the same shape as seen in the product photos. Each kit comes with a Billet Charge Cooler Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Blackline Performance Coolant Expansion Tank Cap Cover - Gray - BMW M...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:641288

Part#: FXXCET

In Stock

$ 65.00 USD

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Qty

$ 65.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Blackline Performance Chargecooler Coolant Tank Cap Cover - Gray - BM...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:641290

Part#: FXXCCT

In Stock

$ 52.00 USD

Add to Wish List

Qty

$ 52.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Charge Cooler Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Charge Cooler Reservoir Cap Cover will fit most BMW vehicles equipped with the S55 and S63 engines with the charge cooler reservoir tank found in the following vehicles: F87 M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more. Check your coolant cap ensuring that it is the same shape as seen in the product photos. Each kit comes with a Billet Charge Cooler Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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2 Pin Connector

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T#:33412932

Part#: 61132359999

Ships on Jul 28, 2026

Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD

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Qty

Sale - Save 25%

$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD

Add to Wish List

Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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BMW Coolant Expansion Tanks for BMW F83 M4 S55 3.0L

Blackline Performance Coolant Expansion Tank Cap Cover - BMW M - Red ...

Blackline Performance Coolant Expansion Tank Cap Cover - BMW M - Blue...

Blackline Performance Chargecooler Coolant Tank Cap Cover - Red - BMW...

Blackline Performance Chargecooler Coolant Tank Cap Cover - Blue - BM...

Blackline Performance Coolant Expansion Tank Cap Cover - Gray - BMW M...

Blackline Performance Chargecooler Coolant Tank Cap Cover - Gray - BM...

2 Pin Connector

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