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BMW E46 323i M52 2.5L

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BMW E46 323i M52 2.5L Engine Cooling Parts

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E46 Radiator Hose - Lower

ES#2531633 - 11531436408 - E46 Radiator Hose - Lower - A common source of cooling system failure - Gates - BMW

A common source of cooling system failure 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:
Gates - Corporate Logo
ES#:
2531633
Mfg#:
11531436408
Ships in 5 Business Days
$42.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Drain Plug (Adjustment Screw) - Priced Each

ES#4056645 - 17111437359 - Radiator Drain Plug (Adjustment Screw) - Priced Each - Located in the bottom of the radiator - URO - BMW

Located in the bottom of the radiator 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 manual transmission only

Brand:
URO - Corporate Logo
ES#:
4056645
Mfg#:
17111437359
Ships in 2 Business Days
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Bleeder Screw - Priced Each

ES#3499697 - 17111712788 - Coolant Bleeder Screw - Priced Each - Coolant bleeder screw that comes with O-Ring. - Rein - BMW MINI

Coolant bleeder screw that comes with O-Ring. 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!

Brand:
Rein - Corporate Logo
ES#:
3499697
Mfg#:
17111712788
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Drain Plug - Priced Each

ES#2696366 - 17111707818 - Coolant Drain Plug - Priced Each - Located in expansion tank mounting - Vaico - BMW

Located in expansion tank mounting 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!

Brand:
Vaico - Corporate Logo
ES#:
2696366
Mfg#:
17111707818
Ships in 1-2 days
$12.99

This product was last offered at the strikethrough price on
05-07-2026

$8.75 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Temperature Switch

ES#31507 - 12521741900 - Temperature Switch - For the engine control unit housing (35 deg. C) - Genuine BMW - BMW

For the engine control unit housing (35 deg. C) 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:
Genuine BMW - Corporate Logo
ES#:
31507
Mfg#:
12521741900
Ships in 4 Business Days
6% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$82.99

This product was last offered at the strikethrough price on
10-25-2026

$77.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BMW Radiator Expansion Tank Pressure Fitting

ES#2827105 - 1175 - BMW Radiator Expansion Tank Pressure Fitting - Allows you to check for leaks in the coolant system - Motive - BMW

Allows you to check for leaks in the coolant system 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
Requires the use of a Motive Power Bleeder, sold separately

Brand:
Motive - Corporate Logo
ES#:
2827105
Mfg#:
1175
Ships in 8 Business Days
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Aluminium Double Pipe

ES#177264 - 64118372784 - Aluminium Double Pipe - Genuine BMW - BMW

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 wagon models

Brand:
Genuine BMW - Corporate Logo
ES#:
177264
Mfg#:
64118372784
Ships in 4 Business Days
4% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$76.99

This product was last offered at the strikethrough price on
10-25-2026

$73.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Clutch

Common source of engine overheating 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

Brand:
Bremmen Parts - Corporate Logo
ES#:
5480962
Mfg#:
11527505302
Ships in 9 Business Days
ON SALE! SAVE 10%
$79.99

This product was last offered at the strikethrough price on
10-08-2026

$71.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Pulley

ES#24360 - 11511436590 - Water Pump Pulley - A common failing piece due to the plastic design. - Genuine BMW - BMW

A common failing piece due to the plastic design. 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:
Genuine BMW - Corporate Logo
ES#:
24360
Mfg#:
11511436590
In Stock
Limited Qty Sale
$73.99

This product was last offered at the strikethrough price on
08-17-2026

$68.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

E46 Water Connection Pipe

ES#2635068 - 17111707817 - E46 Water Connection Pipe - Connects the radiator to the expansion tank - Vaico - BMW

Connects the radiator to the expansion tank 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 automatic transmission only

Brand:
Vaico - Corporate Logo
ES#:
2635068
Mfg#:
17111707817
Ships in 2 Business Days
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 Water Hose - Water Pipe to Expansion Tank

ES#3139079 - 11531436410 - E46 Water Hose - Water Pipe to Expansion Tank - Connects the Expansion Tank to the Water Pipe - Hudson - BMW

Connects the Expansion Tank to the Water 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

Brand:
Hudson - Corporate Logo
ES#:
3139079
Mfg#:
11531436410
Ships in 4 Business Days
$27.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 Radiator Hose - Upper

ES#2531634 - 17127510952 - E46 Radiator Hose - Upper - A common source of cooling system failure - Gates - BMW

A common source of cooling system failure 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:
Gates - Corporate Logo
ES#:
2531634
Mfg#:
17127510952
Ships on Nov 13, 2026
$53.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Inline Temperature Sensor Adapter - Manifold

ES#4500514 - tempswitchman - Inline Temperature Sensor Adapter - Manifold - Allows installation of NPT threaded temperature sensor - Zionsville Autosport - BMW

Allows installation of NPT threaded temperature sensor 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:
Zionsville Autosport - Corporate Logo
ES#:
4500514
Mfg#:
TEMPSWITCHMAN
Ships on Nov 19, 2026
$52.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Temperature Sensor

ES#2802821 - 13621433076 - Temperature Sensor - Monitors coolant / oil temperature - Meistersatz - BMW

Monitors coolant / oil temperature 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:
Meistersatz - Corporate Logo
ES#:
2802821
Mfg#:
13621433076
In Stock at Vendor
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Drain Plug

ES#2814066 - 17111437361 - Radiator Drain Plug - Usually stripped out after being removed - Hamburg Tech - BMW

Usually stripped out after being removed 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!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2814066
Mfg#:
17111437361
Ships in 2 Business Days
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Inlet Pipe

ES#4068915 - 11531705210 - Heater Inlet Pipe - Runs from the front left side of the engine to the heater inlet - Febi - BMW

Runs from the front left side of the engine to the heater inlet 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!

Brand:
Febi - Corporate Logo
ES#:
4068915
Mfg#:
11531705210
Ships on Nov 11, 2026
$47.46 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Cooling Parts

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.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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