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2012 Mercedes Benz S550 Base Sedan 221.173 V8 4.6L

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Your Vehicle 2012 Mercedes Benz S550 Base Sedan 221.173 V8 4.6L
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2012 Mercedes Benz S550 Base Sedan 221.173 V8 4.6L Engine Parts & Accessories

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M157/M278 Cylinder Head Bolt - Set Of 20

M157 / M278 Head Bolt - One Time Use. A full set to secure your cylinder head. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5388726
Mfg#:
278016016964KT1
Ships on Aug 3, 2026
$291.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Bolt - Set Of 10 (11x173mm)

M157 / M278 Head Bolt - One Time Use - Twenty (20) Required Per Engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5388723
Mfg#:
278016016964
Special Order: No Guaranteed ETA
$145.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector Seal Ring - Priced Each

Located at the base of the fuel injector affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
2X Entries For Our G87 M2 Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5373810
Mfg#:
2760160021
Special Order: No Guaranteed ETA
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mercedes M278 Spool FX-170 Upgraded High Pressure Pump Kit

The stock HPFP on the M278 Motors is severely limited in capacity when trying to raise the output of the motor. The FX-170 adds 50% more flow, raising the fueling limits and helping you achieve more power! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Spool Performance - Corporate Logo
ES#:
4736464
Mfg#:
SP-FX-M278
Special Order: No Guaranteed ETA
$3499.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Engine Crankshaft Pulley

Replacement of failed pulley instantly restores proper timing mark position and control of crank vibration affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5386469
Mfg#:
2720300803
Ships on Aug 27, 2026
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$173.99

This product was last offered at the strikethrough price on
05-02-2026

$138.71 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2869704 - 2215000349 - Coolant Expansion Tank - Includes Sensor - Does not include new reservoir cap - Febi - Mercedes Benz

Includes Sensor - Does not include new reservoir cap affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2869704
Mfg#:
2215000349
Special Order: No Guaranteed ETA
$67.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Engine Crankshaft Pulley

ES#2869976 - 2720300803S1 - Engine Crankshaft Pulley - Replacement of failed pulley instantly restores proper timing mark position and control of crank vibration - Febi - Mercedes Benz

Replacement of failed pulley instantly restores proper timing mark position and control of crank vibration affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2869976
Mfg#:
2720300803S1
Special Order: No Guaranteed ETA
$187.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Valve Stem Seal - Priced Each

ES#2864921 - 0000534658 - Valve Stem Seal - Priced Each - For repair or changing valve in the cylinder head - Febi - Mercedes Benz

For repair or changing valve in the cylinder head affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2864921
Mfg#:
0000534658
Special Order: No Guaranteed ETA
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Idler Pulley - Priced Each

ES#4344481 - 2782020519 - Idler Pulley - Priced Each - Upper Grooved Pulley - Febi - Mercedes Benz

Upper Grooved Pulley affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
4344481
Mfg#:
2782020519
Special Order: No Guaranteed ETA
$25.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Engine Oil Filter Kit - Priced Each

ES#2883902 - 2781800009 - Engine Oil Filter Kit - Priced Each - Includes all o-rings needed for installation. For M133, M152, M157, M176, M177, M178 & M278 Engine applications. - Vaico - Mercedes Benz

Includes all o-rings needed for installation. For M133, M152, M157, M176, M177, M178 & M278 Engine applications. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2883902
Mfg#:
2781800009
Special Order: No Guaranteed ETA
$13.99 USD

Camshaft Adjuster - Priced Each

ES#4684399 - 2780504900 - Camshaft Adjuster - Priced Each - Intake Side - Right - Vaico - Mercedes Benz

Intake Side - Right affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4684399
Mfg#:
2780504900
Special Order: No Guaranteed ETA
$1002.99

This product was last offered at the strikethrough price on
04-15-2026

$928.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Exhaust Camshaft Adjuster - Priced Each

ES#4684400 - 2780505200 - Exhaust Camshaft Adjuster - Priced Each - Exhaust Side - Left - Vaico - Mercedes Benz

Exhaust Side - Left affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
from engine # 60 009368 from 02/04/12

Brand:
Vaico - Corporate Logo
ES#:
4684400
Mfg#:
2780505200
Special Order: No Guaranteed ETA
$926.99 USD

Rear Main Seal Retainer - With Seal

ES#4684378 - 2730100814 - Rear Main Seal Retainer - With Seal - Transmission End - Vaico - Mercedes Benz

Transmission End affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4684378
Mfg#:
2730100814
Special Order: No Guaranteed ETA
$62.99 USD
Free Shipping
on orders $49 and up

Lower Engine Oil Pan

ES#4684398 - 2780101728 - Lower Engine Oil Pan - with oil drain plug - Vaico - Mercedes Benz

with oil drain plug affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4684398
Mfg#:
2780101728
Special Order: No Guaranteed ETA
$382.99 USD

Turbocharger Coolant Line

ES#4900177 - 2782000900 - Turbocharger Coolant Line - To Turbocharger (Feed) - Left - Vaico - Mercedes Benz

To Turbocharger (Feed) - Left affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4900177
Mfg#:
2782000900
Special Order: No Guaranteed ETA
$34.99 USD
Free Shipping
on orders $49 and up

Engine Coolant Temperature Sensor - Priced Each

ES#4684820 - 0009056102 - Engine Coolant Temperature Sensor - Priced Each - Includes Sealing Ring & Retaining Clip - Vemo - Mercedes Benz

Includes Sealing Ring & Retaining Clip affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
4684820
Mfg#:
0009056102
Special Order: No Guaranteed ETA
$7.99 USD

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

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