Common source of leaks, mounted between your oil filter and engine block
10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with VIN up to 3B-X-600 000 only, split is in the 1999 model year
Brand:
ES#:
4939990
Mfg#:
078117021A
In Stock
ON SALE!
SAVE 22%
$36.99
This product was last offered at the strikethrough price on 05-02-2026
Connects the lower radiator port to the thermostat housing
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with VIN from 3B-X-145 414 or VIN 3B-XE173 716 through VIN 3B-1-050 000 only, splits are in the 1999 and 2001 model years
Connects the oil cooler to the upper coolant pipe
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with VIN up to 3B-X-600 000 only, split is in the 1999 model year
Located on the lower side of the radiator
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Includes sealing O-Ring
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For the belt driven auxiliary fan
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Connects lower radiator port to the thermostat housing
2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat! For vehicles with AHA engine code with VIN up to 3B-X-145 413 or 3B-XE173 715 only, split is in the 1999 model year
Includes integrated coolant level sensor, does not include cap
2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat!
Keep proper pressure in your coolant system
5X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat!
Connects the coolant pipe to the throttle body
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with AHA engine code only
Brand:
ES#:
283607
Mfg#:
078121188
Ships in 4 Business Days
14% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$28.99
This product was last offered at the strikethrough price on 08-31-2026
Connects the lower radiator port to the thermostat housing
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with VIN from 3B-X-145 414 or VIN 3B-XE173 716 through VIN 3B-1-050 000 only, splits are in the 1999 and 2001 model years
<font color='blue'>Blue</font> sensor with square connector. Please check existing sensor color
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply For vehicles with VIN up to 3B-X-491,580, split is in the 1999 model year.
Replacement 4 pin relay
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply Used for fan control
Replacement 4 pin relay
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply Used for fan control
Brand:
ES#:
3437884
Mfg#:
4H0951253
Ships in 2 Business Days
$12.99
This product was last offered at the strikethrough price on 07-15-2026
Ensure a proper seal when installing a new water pump
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Brand:
ES#:
3479
Mfg#:
078121043A
Ships in 1-2 days
$8.99
This product was last offered at the strikethrough price on 08-13-2026
Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.
