BMW 7574145 Engine Motor Crankshaft Reluctor Wheel N55

( Manufacturer Part Number: 7574145 ), ( Part Type: Engine Motor Crankshaft Wheel ), ( Material: Steel ), ( Finish: Matte ), ( Country Of Origin: Germany ), ( Performance Part: Yes )

Review BMW Engine Motor Crankshaft Reluctor Wheel N55 fits 335I E90 E92 E93

The **BMW N55 engine crankshaft reluctor wheel (part number 7574145)** is a precision-engineered component integral to the performance, reliability, and diagnostic functionality of the iconic **E90, E92, and E93 335i models** equipped with the legendary **N55 inline-six turbocharged engine**. This reluctor wheel, also known as a crankshaft position sensor (CKP) wheel, plays a critical role in the engine s electronic management system by generating a series of magnetic pulses that the engine control unit (ECU) interprets to precisely determine the crankshaft s rotational position and speed. Crafted from high-grade, durable materials, the N55 reluctor wheel is designed to withstand the demanding conditions of high-performance driving, turbocharged boost pressures, and the inherent stresses of BMW s advanced direct-injection and twin-scroll turbocharging setup. Its unique tooth pattern optimized for the N55 s specific engine dynamics ensures accurate crankshaft position sensing, which is essential for optimal fuel injection timing, ignition sequencing, and variable valve timing (VANOS) synchronization. Over time, wear, corrosion, or physical damage can compromise the wheel s integrity, leading to erratic engine performance, misfires, or even failure to start, making this part a vital component for maintaining the engine s peak efficiency and longevity. Whether replacing a worn-out original unit or upgrading to a high-quality aftermarket alternative, this reluctor wheel ensures seamless integration with the N55 s sophisticated sensor network, supporting everything from the engine s turbocharger wastegate control to its adaptive shift strategies in conjunction with the Getrag GS6-57BZ transmission. For enthusiasts and mechanics alike, sourcing a genuine or meticulously replicated **7574145 reluctor wheel** is a straightforward yet impactful way to preserve the driving dynamics and reliability of one of BMW s most beloved and versatile engines.

### **Pros and Cons of Buying a BMW N55 Engine (E90/E92/E93 335i) with a Rebuilt Crankshaft and Reluctor Wheel (Part Number: 7574145)**

#### **Pros**

1. **Reliability and Performance**

The BMW N55 is a well-regarded inline-6 engine known for its balance of power and efficiency. With a rebuilt crankshaft and reluctor wheel, you can expect improved longevity and smoother operation. The N55 is also known for its strong aftermarket support, meaning parts and tuning options are widely available.

2. **Fuel Efficiency and Eco Performance**

The N55 was designed with efficiency in mind, featuring direct fuel injection, turbocharging, and variable valve timing. Even with modifications, it retains decent fuel economy compared to naturally aspirated engines of similar power.

3. **Aftermarket Potential**

The N55 is one of the most popular BMW engines for tuning, with a vast array of performance parts available. You can easily upgrade intake, exhaust, ECU tuning, and forced induction (turbo or supercharger) to increase power while maintaining reliability.

4. **Turbocharger and Cooling Improvements**

The N55 uses a single turbocharger with an intercooler, which, when properly maintained, provides consistent power delivery. A rebuilt crankshaft and reluctor wheel suggest that the engine has been serviced with attention to wear points, reducing the risk of turbo-related issues.

5. **Resale Value and Community Support**

BMW N55 models (E90/E92/E93 335i) hold decent resale value, especially if well-maintained. The large owner community means troubleshooting help, forums, and parts availability are readily accessible.

6. **Durability with Proper Maintenance**

When maintained correctly (regular oil changes, cooling system flushes, and timely repairs), the N55 can last well beyond 200,000 miles. A rebuilt crankshaft and reluctor wheel indicate that the seller has taken steps to prevent catastrophic failure.

---

#### **Cons**

1. **Common Weaknesses if Neglected**

- **Timing Chain and Tensioner:** While the N55 uses a timing chain (not belt), the tensioner and guides can wear out, leading to chain stretch or failure. A rebuilt crankshaft suggests attention to this, but ensure the tensioner has also been replaced.

- **Water Pump and Thermostat:** The water pump is plastic and can fail, leading to overheating. The thermostat is also prone to sticking, causing poor cooling.

- **Turbocharger and Wastegate:** The turbo can fail if the engine runs low on oil or if the wastegate actuator sticks, causing boost leaks.

- **Oil Leaks:** The N55 is notorious for oil leaks from the valve cover gasket, oil filter housing gasket, and oil pan gasket. Ensure these have been addressed.

2. **Cost of Maintenance**

While the N55 is reliable, repairs can be expensive due to BMW s parts pricing and labor costs. A rebuilt crankshaft is a significant investment, and other common issues (water pump, tensioner, seals) add up over time.

3. **Electrical and Sensor Issues**

The reluctor wheel (part of the crankshaft position sensor) can wear out or become dirty, causing misfires or check engine lights. A replacement ensures proper sensor function but may not address underlying electrical gremlins (e.g., faulty injectors, wiring issues).

4. **Turbo Lag and Throttle Response**

The N55 s single turbocharger can cause noticeable lag under heavy acceleration, especially in cold conditions. While tuning can mitigate this, it s a limitation compared to twin-turbo setups.

5. **Carbon Buildup in Intake**

Direct injection engines like the N55 are prone to carbon buildup on intake valves, which can reduce performance and fuel efficiency over time. Regular intake cleaning is recommended.

6. **Depreciation and Market Saturation**

The N55 has been around for over a decade, and while it s still popular, the market is saturated with used examples. Pricing can be competitive, and finding a well-documented, low-mileage example with a clean service history may require extra effort.

---

### **Conclusion**

The BMW N55 (E90/E92/E93 335i) with a rebuilt crankshaft and reluctor wheel (part 7574145) is a strong choice for those seeking a balance of performance, efficiency, and aftermarket potential. The engine is robust when maintained, and the rebuilt components suggest the seller has taken proactive steps to address wear points. However, potential buyers must be prepared for common issues like oil leaks, timing chain maintenance, and cooling system reliability.

If you prioritize a well-supported, tunable engine with decent efficiency and are willing to invest in regular maintenance, the N55 is a solid option. That said, if you re looking for a plug-and-play experience with minimal upkeep, you may want to consider newer BMW engines or other high-performance alternatives.

---

### **Recommendation**

1. **Verify the Rebuild Quality**

Ensure the crankshaft rebuild was done by a reputable shop with experience in BMW engines. Ask for documentation or a service record confirming the work was performed.

2. **Inspect for Common Issues**

- Timing chain tensioner and guides

- Water pump and thermostat

- Oil leaks (valve cover, oil filter housing, oil pan)

- Turbocharger condition and wastegate function

- Cooling system (radiator, hoses, expansion tank)

3. **Check Maintenance History**

A well-documented service history (oil changes, cooling flushes, belt/tensioner replacements) is crucial. The N55 rewards proper care with longevity.

4. **Consider a Tune and Upgrades**

If buying used, budget for immediate upgrades like a high-quality oil filter, upgraded oil cooler, and a performance tune (e.g., MHD, Haltech, or custom ECU). These can improve reliability and power.

5. **Budget for Future Repairs**

Set aside funds for potential future issues, especially if the car is older. The N55 is reliable but not immune to wear plan for the long term.

6. **Test Drive and Listen for Issues**

- Turbo spool (should be smooth, no excessive lag)

- Engine noise (unusual rattles or clunks could indicate timing chain or valve train issues)

- Cooling performance (check temp gauge under load)

- Electrical gremlins (check engine light, sensor readings)

If the car checks out in these areas, the N55 is an excellent choice for an enthusiast-driven BMW. If you re unsure about maintenance or the car s history, consider a newer model or a different engine platform (e.g., N54, S55, or even a diesel if you prefer torque).

Details:

This item will work for cars with N55 engine by matching the part number to yours 7574145. . Average response times. Winder GA 30680.

Please understand these are used parts, by saving money there aerials some risks. Please verify fitment before purchasing. Part Compatibility.

part #: 7574145 prices

• $40.00-$50.00

specifications cranshafengin:

• for models: 335i, E90, E92, E93
• for makes: Bmw
• mpn: 7574145
• part type: Engine Motor Crankshaft Wheel
• material: Steel
• finish: Matte
• country of origin: Germany
• performance part: Yes

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

payments cranshafengin:

• credit card: Discover
• cash
• wallet: Google-pay
• other

seller cranshafengin:

• city: Winder, Georgia
• rating: 97.8%
• # reviews: 7804

returns cranshafengin:

• policy: No Returns

shipping cranshafengin:

• service: Standard, USPS Priority Mail
• transit: 5-9 Days
• cost: $6.95
• carrier: USPS
• class: Standard, Expedited
• type: Fixed

offer cranshafengin:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: February 12, 2026
• sold: 0
• best offers: True

Bmw 7574145 Is Similar To:

• 009110521 Hella New Crankshaft Position Sensor Bmw (36.4% similar) Items are not returnable if they in the original sealed container packaging. Shipping most items have standard available for cores: any cores must be in rebuild able condition with sufficient parts to rebuild said core rust, corrosion, OK fitment please see the compatibility's section. 95 and is ...(July 20th, 2018)
• 009163381 Hella For Bmw Engine Crankshaft Position Sensor (39.1% similar) 07 lbs x w H2. If you live outside of the USA please research and verify it fits your vehicle before purchasing. If you wish to purchase multiple items please. 4 v8 gas fi 4398CC, german engineered OE 2001 BMW 740IL. We combine shipping on the same item. 4 v8 gas fi 4398CC, german engineered OE ...(January 9th, 2019)
• 0281002477 Bosch New Bmw Crankshaft Position Sensor (29.5% similar) The price is as it states on. Standard shipping is sent via FedEx smart post which a 5-9 day economy service. Bmw: 335D x5 this crankshaft position sensor is a brand new part manufactured by bosch engine management. To ship the parts, you would get a credit of 45. Fitment please see the ...(May 26th, 2018)
• 045-0389 Engine Crankcase Vent Valve Fits Bmw (39.7% similar) 9i convertible 2-DOOR, base coupe hatchback sedan 4-DOOR, roadster 2-DOOR...(April 1st, 2018)
• 045-0391 Engine Crankcase Vent Valve Fits Bmw (39.7% similar) Price is for 1 unit. 8L-V8ADJUST quantity as needed. Stock is updated nightly, so it possible that an item shows in but was already sold. Through Fri. The item specifics section also contains important details...(April 7th, 2018)
• 04777584aa Bmw Mini Cooper Crankshaft Used (40.7% similar) Part 04777584AA...(May 7th, 2018)
• 054 06012 280 Wd Express Engine Crankshaft Fits Bmw 884109836612 (40% similar) When opening a return, please state the reason for year, make and model of vehicle you purchased part...(October 10th, 2018)
• 054 06022 260 Wd Express Corteco Engine Crankshaft Pulley Fits Bmw (39.4% similar) 0SI sport utility 4-DOOR, base convertible 2-DOOR, coupe sedan wagon luxury m modern SDRIVE30I XDRIVE30I 4-DOOR. 24X7 online. All products are covered by manufacturers warranty. Ed express supplied your vehicles manufacturer with the engine crankshaft pulley. Listing data is catalog provider...(September 13th, 2018)
• 054 06032 001 Wd Express Engine Crankshaft Fits Bmw (42.6% similar) That section provides detailed information about the part and compatible vehicles. All parts come with a 1-YEAR warranty and 30-DAY return period. 0i sport utility 4-DOOR, base convertible 2-DOOR, coupe sedan wagon lightweight m roadster 2-DOOR...(May 20th, 2018)
• 11-11-7-587-168 Bmw Genuine Engine Block Crankshaft Seal Mm Rear Oem (41.7% similar) Read all notes and compare with your vehicle information. Genuine bmw engine block crankshaft seal 90 x 110 8MM rear oem condition: new brand: mpn: warranty: lifetime manufacturer part number: fitment type: direct replacement other to ensure proper please enter vehicles year, make and model in the ...(June 27th, 2018)
• 11 14 7 512 101 20033891b Oem For Bmw Rear Crankshaft Seal Housing (30.2% similar) Brand new oem part. For bmw E60 E63 E66 E70 rear crankshaft seal w housing oem cortege-CF fix your leaking yourself and save money...(October 23rd, 2018)