Located on the left side of your vehicles cylinder head
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 DZ Engine Code Only - Up To VIN 81-D-250000, Split is in the 1983 model year - All JN, SD, 3A Engine Code With Automatic Transmission
Common point of failure or leaking for the cooling system
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***Please see photos and description prior to ordering, all sales final.***
ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product! 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#:
5491584
Mfg#:
06L121111N
In Stock
ON SALE!
SAVE 14%
$409.99
This product was last offered at the strikethrough price on 10-03-2026
O-Ring between thermostat housing and cylinder head
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Regulates coolant flow for managing temperature within the specified range
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 CATA engine code only (2009-2012)
Brand:
ES#:
5482206
Mfg#:
059122111DKT
Ships in 2 Business Days
$209.99
This product was last offered at the strikethrough price on 10-05-2026
Located on the front right of the engine block
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Located at the rear of cylinder head, includes o-rings
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Used with coolant flange and thrust ring to create a leak free seal
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Replace your leaking or cracked coolant pipe to keep your engine running at the proper temperature.
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Coolant supply pipe for the cylinder heads
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Brand:
ES#:
4899522
Mfg#:
06E121045J
Ships in 4 Business Days
$91.99
This product was last offered at the strikethrough price on 10-22-2026
Ensure your 4.0T engine reaches and maintains optimal operating temperature by replacing a sticking or failed thermostat assembly. Includes the housing and sealing gasket.
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Brand:
ES#:
5515576
Mfg#:
079121115BL
Ships in 4 Business Days
$142.99
This product was last offered at the strikethrough price on 09-10-2026
Engineered to replace the factory plastic coolant elbow with a precision-machined 6061 aluminum solution featuring a dual-gasket design for maximum sealing and long-term reliability.
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Delivers a permanent solution with OEM fit and finish.
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This is a must-have upgrade for anyone chasing down mystery coolant loss or proactively refreshing their 4.0T cooling system.
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Eliminate common coolant leaks and overheating risks on your Audi 4.0T with this durable, CNC-machined billet aluminum reliability upgrade.
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Eliminate common coolant leaks and overheating risks on your Audi 4.0T with this durable, CNC-machined billet aluminum reliability upgrade.
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
Lifetime Replacement
