BMW Internal Engine Parts for BMW 1 Series

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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Bav Auto Tools - Corporate Logo
T#:580444
Part#: B8800139
Ships in 9 Business Days
Sale - Save 5% $ 203.99

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$ 193.79 USD
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Used in removal and installation of the front crankshaft seal on BMW N55 engines, a common job that you can save yourself a ton of money doing at home.
Check Valve - 11367541692
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Bremmen Parts - Corporate Logo
T#:37655979
Part#: 11367541692
In Stock
Sale - Save 11% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 29.37 USD
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Sale - Save 11%
$ 32.99

This product was last offered at the strikethrough price on
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$ 29.37 USD
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A damaged, leaking, or missing vacuum check valve can lead to engine performance problems, trigger the check engine light, and potentially cause your vehicle to fail an emissions test.
Bav Auto Tools - Corporate Logo
T#:580412
Part#: B8800104
In Stock
Sale - Save 5% $ 147.99

This product was last offered at the strikethrough price on
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$ 140.59 USD
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$ 147.99

This product was last offered at the strikethrough price on
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$ 140.59 USD
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For removal and installation of the rear crankshaft seal on BMW N51, N52 and N54 engines.

N52 Valvetronic Camshaft Adjusting Unit - 11377548388
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Bremmen Parts - Corporate Logo
T#:36066208
Part#: 11377548388
In Stock
Sale - Save 20% $ 148.99

This product was last offered at the strikethrough price on
05-03-2026

$ 119.13 USD
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Sale - Save 20%
$ 148.99

This product was last offered at the strikethrough price on
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$ 119.13 USD
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This Valvetronic variable valve timing actuator is designed to optimize engine performance by adjusting the eccentric shaft, effectively increasing or decreasing valve lift and duration as needed. By dynamically controlling valve timing, it enhances power delivery, fuel efficiency, and overall driving performance.

A failing actuator can lead to noticeable power loss, reduced performance, and an illuminated check engine light. Restore your BMW's performance with this premium replacement from Bremmen Parts, designed to meet or exceed OE specifications.

Features:

Exact Fitment: Engineered to perfectly match your BMW’s specifications for seamless installation. Durable Construction: Built with high-strength materials to resist engine heat, vibration, and wear. Precision Manufacturing: Designed to OE dimensions for accurate clearances and alignment. Optimal Performance: Restores proper timing and functionality at all engine speeds. Get your BMW back on the road with reliable performance and confidence.

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Bav Auto Tools - Corporate Logo
T#:580431
Part#: B8800124
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Sale - Save 15% $ 178.99

This product was last offered at the strikethrough price on
05-03-2026

$ 152.14 USD
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Sale - Save 15%
$ 178.99

This product was last offered at the strikethrough price on
05-03-2026

$ 152.14 USD
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For installation and removal of pressure springs on intermediate levers of valve train. Ensures quick, easy and safe handling of these high force springs.
Bremmen Parts Eccentric Shaft - BMW N55 S55 3.0L
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Bremmen Parts - Corporate Logo
T#:36913364
Part#: 11377589883
In Stock
Sale - Save 20% $ 614.99

This product was last offered at the strikethrough price on
05-03-2026

$ 491.22 USD
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Sale - Save 20%
$ 614.99

This product was last offered at the strikethrough price on
05-03-2026

$ 491.22 USD
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This eccentric shaft is a vital component of your BMW's N55 Valvetronic system, responsible for precise control of valve lift. In the N55 engine, the Valvetronic system uses intermediate levers between the camshaft and lifters to adjust valve lift dynamically. These levers are actuated by this eccentric shaft, which is rotated by an electronically controlled motor under the direction of the engine computer.

Eccentric shaft failure is a common issue in N55 engines, often caused by inadequate lubrication due to extended oil change intervals. The most frequent failure occurs when the eccentric shaft gear wears down, leading to disengagement from the motor's worm drive. Symptoms include multiple fault codes, such as P1014 (Shaft Parity Error), P1017 (Shaft Sensor Plausibility), P1023 (Valvetronic Adjustment Range), and P10E1 (Valvetronic System No Travel Detected).

If your BMW is experiencing Valvetronic-related fault codes, a failing eccentric shaft could be the source of the problem. Opt for this premium direct replacement from Bremmen Parts to restore your Valvetronic system's functionality and ensure a durable, high-quality repair.

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MMX Performance - Corporate Logo
T#:19891361
Part#: MMR20-1004
Ships in 2 Business Days
$ 1,064.99 USD
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$ 1,064.99 USD
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Both the N55 and S55 engines are plagued by the same issue when chasing high horsepower numbers... the dreaded crankhub failure. Fortunately MMR Performance has released an upgraded version of their already stout single-piece crankhub, but this time offering a 4-pin dowelled location that locks onto the front of the crankshaft. This configuration eliminates the multi-piece crankhub with friction discs in favor of a more robust single piece crankhub. Recommended for high-powered cars over 700 Horsepower
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Mahle Motorsports - Corporate Logo
T#:2928970
Part#: 197832209
In Stock at Vendor
$ 1,088.99 USD
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$ 1,088.99 USD
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Forged, 2618. Phosphate + Grafal + Hard Anodized top ring groove + TBC

MMX Performance - Corporate Logo
T#:45039725
Part#: MMR20-1004FK
Ships in 3 Business Days
$ 1,227.99 USD
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$ 1,227.99 USD
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The centerpiece of this MMX kit is the UK-made CNC-machined one-piece crank hub, created from billet EN36 steel that's heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Included are four aerospace precision-machined dowels that mechanically lock the hub to the end of the crank itself, plus a brand new OE bolt. Installation of these dowels is certainly not a DIY job. But, to make the job easier for the professionals, ensuring that the required crank modifications are made safely and accurately, the MMX kit also includes a full installation jig that includes a bolt-on drilling guide, a location bolt for this guide, plus an HSS rolled high-speed drill bit. Together, the single-piece design combined with the four-pin location ensures that there is simply no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability and peace of mind versus the OE version. Also included is the MMR Crank Bolt Capture Plate. This adds one additional layer of defense, preventing the crank bolt from being able to back out and loosen over time, ensuring everything is tightly held together as intended.
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MMX Performance - Corporate Logo
T#:4565824
Part#: MMR20-1003FK
Ships in 2 Business Days
$ 849.99 USD
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$ 849.99 USD
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Anyone with a modified N55/S55 knows the risks involved with the OEM Crank Hub. When the engine simply can't handle the stresses its put under or the design is such that it simply does not support extreme conditions, issues can arise. Under certain conditions, the N55/S55 crank hub likes to spin, without warning and even when the engine is in perfect health. MMR has produced a EN36 machined billet one-piece crank hub heat treated with a 0.75mm case hardening which makes it extremely durable. Due to the one-piece design, it ensures that the friction plates cannot slip. This offers a huge jump in reliability when paired with a new properly torques crank bolt. Installation is requires no drilling or modification to the OEM crankshaft ensuring a perfect fit! Included in this kit is MMR's T-6061 machined billet aluminum capture plate anodized in their trademark finish. The MMR Performance capture plate secures the head of the OE crank bolt and prevents it from turning or being able to loosen. *Installation recommended by a professional shop or technician.
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Mahle Motorsports - Corporate Logo
T#:2928972
Part#: 197832225
Back Ordered
$ 1,088.99 USD
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$ 1,088.99 USD
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BMW N54 3.0L MAHLE Forged Piston Kit 84.50mm delivers exceptional performance and reliability for BMW engines. This high-quality piston kit is designed to replace the weaker factory cast aluminum pistons with robust forged pistons, enhancing durability and heat tolerance for extreme engine conditions.

  • Enhanced Strength: Forged from 2618 aluminum, these pistons are more resistant to extreme heat, detonation, and high pressure, providing superior performance.
  • Precision Specifications:
    • Bore: 84.50mm
    • Stroke: 89.6mm
    • Rod: 145.05mm
    • CH: 31.7mm
    • Piston Style: Dish with 4 valve reliefs
    • Crown Volume: 17.2cc
    • Piston Mass: 314g
    • Pin Diameter: 22mm
    • Pin Style: Floating
  • Complete Kit: Includes pistons, pins, clips, and rings (1.0mm, 1.2mm, 2.8mm thickness).
  • Durable Coatings: Features phosphate, Grafal, and hard anodized top ring groove for added longevity.
  • Sold as a Set: Comes as a set of 6 pistons.

MAHLE Motorsport's PowerPak and PowerPak+ piston kits are engineered for both high-performance and everyday driving, offering a reliable upgrade for BMW engines. With over 95 years of performance experience, MAHLE Motorsport provides advanced features and superior quality for your engine build.

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Mahle Motorsports - Corporate Logo
T#:2928971
Part#: 197832209T
Special Order: No Guaranteed ETA
$ 1,271.99 USD
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$ 1,271.99 USD
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Forged, 2618. Phosphate + Grafal + Hard Anodized top ring groove + TBC Get the performance and reliability your N54 needs with MAHLE Motorsports PowerPak Piston Kit. Replacing the weaker factory cast aluminum pistons with the strength and durability of a forged piston. MAHLE forged pistons more tolerant to the abuses of extreme heat, detonation and pressure inherent in performance oriented engines.
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Cat Cams - Corporate Logo
T#:25805753
Part#: 1305003
Special Order: No Guaranteed ETA
$ 1,950.00 USD
Free Shipping on orders $49 and up
Upgrade your N54 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their race cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! The VANOS (VVT) system on the intake camshaft changes the PD from 125° to 70°. The data are shown for full intake retard (disengaged VVT). The VANOS (VVT) system on the exhaust camshaft changes the PD from 130° to 85°. The data are shown for full exhaust advance (disengaged VVT). Tuning Required!
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Cat Cams - Corporate Logo
T#:25805752
Part#: 1305002
Special Order: No Guaranteed ETA
$ 1,950.00 USD
Free Shipping on orders $49 and up
Upgrade your N54 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their Hot Street cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! The VANOS (VVT) system on the intake camshaft changes the PD from 125° to 70°. The data are shown for full intake retard (disengaged VVT).The VANOS (VVT) system on the exhaust camshaft changes the PD from 130° to 85°. The data are shown for full exhaust advance (disengaged VVT). Tuning advised!
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Mahle Motorsports - Corporate Logo
T#:2928969
Part#: 197841309T
In Stock
$ 1,271.99 USD
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$ 1,271.99 USD
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Forged, 2618. Get the performance and reliability your N54 needs with MAHLE Motorsports PowerPak Piston Kit. Replacing the weaker factory cast aluminum pistons with the strength and durability of a forged piston.
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Crankshaft
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Bremmen Parts - Corporate Logo
T#:38924612
Part#: 11217580483
Special Order: No Guaranteed ETA
Sale - Save 3% $ 1,608.99

This product was last offered at the strikethrough price on
05-03-2026

$ 1,560.27 USD
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Sale - Save 3%
$ 1,608.99

This product was last offered at the strikethrough price on
05-03-2026

$ 1,560.27 USD
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Direct replacement N55 crankshaft for a fraction of the cost of Genuine

Mahle Motorsports - Corporate Logo
T#:2928976
Part#: 197841325
Ships in 2 Business Days
$ 1,088.99 USD
Free Shipping
$ 1,088.99 USD
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Forged, 2618. Get the performance and reliability your N54 needs with MAHLE Motorsports PowerPak Piston Kit. Replacing the weaker factory cast aluminum pistons with the strength and durability of a forged piston.
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Mahle Motorsports - Corporate Logo
T#:2928968
Part#: 197841309
Back Ordered
$ 1,088.99 USD
Free Shipping
$ 1,088.99 USD
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BMW N54 3.0L MAHLE Forged Piston Kit 84mm delivers superior performance and reliability for your BMW engine build. This high-quality piston kit replaces the factory cast aluminum pistons with robust forged pistons, offering enhanced durability and heat resistance. Designed to withstand the stresses of extreme temperatures, detonation, and high pressure, these pistons are ideal for high-performance applications. MAHLE Motorsport’s PowerPak Piston Kit ensures a significant upgrade in strength and reliability, making it perfect for both motorsport enthusiasts and those seeking to enhance their daily driving experience.

  • Enhanced Durability: Forged pistons provide superior strength and are more resistant to extreme heat, detonation, and high pressure compared to cast aluminum.
  • Precision Engineering: Made from high-quality 2618 alloy, ensuring reliability under demanding conditions.
  • Complete Kit: Includes pistons, pins, clips, and rings for a comprehensive upgrade.
  • Optimized Performance: Designed for high-performance applications, improving engine efficiency and power output.
  • Advanced Coatings: Features phosphate, Grafal, and hard anodized top ring groove coatings for extended longevity and performance.

Specifications:

  • Compression Ratio: 9.5:1
  • Bore: 84.00mm
  • Stroke: 89.6mm
  • Rod: 145.05mm
  • CH: 31.7mm
  • Piston Style: Dish, with 4 valve reliefs
  • Crown Volume: 17.2cc
  • Piston Mass: 314g
  • Piston Material: Forged, 2618
  • Pin Diameter: 22mm
  • Pin Style: Floating
  • Pins Included: Yes
  • Clip Style: Round Wire
  • Clips Included: Yes
  • Piston Ring Thickness: 1.0mm, 1.2mm, 2.8mm
  • Rings Included: Yes
  • Sold As: Set of 6
  • Coatings: Phosphate, Grafal, Hard Anodized top ring groove
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Cat Cams - Corporate Logo
T#:25805744
Part#: 1305001
Special Order: No Guaranteed ETA
$ 1,950.00 USD
Free Shipping on orders $49 and up
Upgrade your N54 Engine with Cat Cams, a leader in the performance-aftermarket camshaft industry. These Camshafts will increase airflow into the engine by increasing the overall lift and duration over the factory cams. With their Street cam setup, you can run all factory valvetrain, with no valve spring upgrades necessary! The VANOS (VVT) system on the intake camshaft changes the PD from 125° to 70°. The data are shown for full intake retard (disengaged VVT). The VANOS (VVT) system on the exhaust camshaft changes the PD from 130° to 85°. The data are shown for full exhaust advance (disengaged VVT). Check the distance between valves and piston to be 1mm at least with VVT engaged. Wrong installation will cause severe engine damage! The VANOS (VVT) system on the intake camshaft changes the PD from 125° to 70°. The data are shown for full intake retard (disengaged VVT). The VANOS (VVT) system on the exhaust camshaft changes the PD from 130° to 85°. The data are shown for full exhaust advance (disengaged VVT).
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OEM Ina Intake Hydraulic Tappet - BMW N52 N54 N55 N20 S55
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:591661
Part#: 11337548690
In Stock
$ 15.99 USD
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Hydraulic valve lifter

Bremmen Parts - Corporate Logo
T#:1195922
Part#: 11127575422
In Stock
Sale - Save 3% $ 6.59

This product was last offered at the strikethrough price on
05-03-2026

$ 6.39 USD
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Sale - Save 3%
$ 6.59

This product was last offered at the strikethrough price on
05-03-2026

$ 6.39 USD
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The sleeves that go in each cylinder of the cylinder cover

Ina - Corporate Logo
T#:596290
Part#: 11337605330
In Stock
$ 9.99 USD
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If your BMW has noisy or stuck lifters, replace them to improve performance and stop the annoying chatter
Ina - Corporate Logo
T#:41492602
Part#: 11337559797
In Stock
$ 22.99 USD
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$ 22.99 USD
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Rocker arms work in conjunction with your camshafts and valves, applying pressure from the camshaft to open and close your intake and exhaust valves. If your rocker arm rollers have failed, this can lead to extreme camshaft damage, requiring the camshaft to be replaced. Replace your rockers whenever servicing your camshafts or replacing your hydraulic lifters to ensure long-term engine reliability.
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Mahle Motorsports - Corporate Logo
T#:2928977
Part#: 197841325T
Special Order: No Guaranteed ETA
$ 1,271.99 USD
Free Shipping
$ 1,271.99 USD
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Forged, 2618. Get the performance and reliability your N54 needs with MAHLE Motorsports PowerPak Piston Kit. Replacing the weaker factory cast aluminum pistons with the strength and durability of a forged piston.
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Mahle Motorsports - Corporate Logo
T#:2928973
Part#: 197832225T
Special Order: No Guaranteed ETA
$ 1,271.99 USD
Free Shipping
$ 1,271.99 USD
Free Shipping
Forged, 2618. Get the performance and reliability your N54 needs with MAHLE Motorsports PowerPak Piston Kit. Replacing the weaker factory cast aluminum pistons with the strength and durability of a forged piston.
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