VICTOR REINZ 81-37122-00 Rear Crankshaft Seal 884109863618

( Brand: Victor Reinz ), ( Manufacturer Part Number: 81-37122-00 ), ( Product Type: Engine ), ( UPC: 884109863618 ), ( Fitment Type: Direct Replacement ), ( Compatible Model S : X5, X3, Z4, X6, 325i, 328i Xdrive, 328i, 335i, 335i Xdrive, 328xi ), ( Product Subtype: Crankshafts ), ( Placement On Vehicle: Rear ), ( Type: Seals Gaskets ), ( Product Details: Engine Crankshaft Seal ), ( Department: Replacement )

Review VICTOR REINZ Bmw Rear Crankshaft Seal fits X5 2007–2009

The **Victor Reinz 81-37122-00** is a high-performance, precision-engineered rear crankshaft seal designed specifically for BMW X5 models produced between 2007 and 2009, ensuring optimal sealing and longevity for the transmission s internal components. Crafted from Victor Reinz s proprietary **high-quality nitrile rubber compound**, this seal is engineered to withstand the demanding conditions of modern automotive transmissions, including high temperatures, fluctuating pressures, and constant mechanical stress. The seal features a **metal-reinforced lip design**, which enhances durability and prevents premature wear, even under aggressive driving conditions or extended periods of use. Its **smooth, low-friction lip profile** minimizes resistance during crankshaft rotation, reducing unnecessary strain on the transmission s internal bearings and seals, thereby extending the overall lifespan of the drivetrain. The **perfectly calibrated lip tension** ensures a secure, leak-proof barrier against transmission fluid, preventing costly leaks that could lead to transmission damage or failure. Compatible with both automatic and manual transmission variants of the BMW X5 in this generation, this seal is a direct-fit replacement, eliminating the need for modification or adaptation, and is backed by Victor Reinz s reputation for reliability and performance. Whether addressing a minor leak or performing a routine maintenance overhaul, this seal delivers the precision and durability required to maintain the integrity of the rear crankshaft assembly, ensuring smooth operation and peace of mind for the vehicle s owner.

The Victor Reinz part number **81-37122-00** is a direct-fit replacement for the rear crankshaft seal (also called the oil pump seal or rear main seal) on **BMW X5 (E70) models from 2007 to 2009** with the **N52 or N54 engine**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of Victor Reinz 81-37122-00**

1. **Direct Fit and Compatibility**

- This is a **direct-fit replacement**, meaning it is designed specifically for the BMW X5 E70 rear crankshaft seal application. It matches the original equipment manufacturer (OEM) dimensions, reducing the risk of installation issues or leaks.

2. **High-Quality Materials**

- Victor Reinz is a reputable aftermarket parts manufacturer known for using **durable materials**, including reinforced rubber and high-grade elastomers. This seal is designed to withstand the pressures and temperatures of a modern engine.

3. **Proven Reliability**

- Many BMW owners and mechanics report positive experiences with Victor Reinz seals, particularly for high-mileage vehicles. The seal is often praised for its **longer lifespan compared to cheaper alternatives**, reducing the likelihood of premature failure.

4. **Ease of Installation**

- The seal is pre-lubricated and designed to fit snugly into the crankshaft housing. While installation can be challenging (especially for DIYers), the seal itself is straightforward to position correctly, reducing the risk of damage during fitting.

5. **Cost-Effective Alternative to OEM**

- Compared to **BMW genuine parts (e.g., 13650000000 or 13650000001)**, Victor Reinz offers a **significantly lower price** without sacrificing quality. This makes it an attractive option for budget-conscious buyers who still want a reliable seal.

6. **Widely Available**

- Victor Reinz parts are stocked by most **BMW specialty shops, auto parts stores (e.g., RockAuto, Amazon, eBay), and online retailers**, making it easy to source without long wait times.

7. **Good Warranty Coverage**

- Victor Reinz typically offers a **1-year warranty** on their seals, providing some peace of mind in case of defects or early failure.

8. **Compatibility with Common Modifications**

- Since this is a standard fit, it works well even if the vehicle has undergone **minor modifications** (e.g., exhaust, intake, or minor engine tuning), as long as the crankshaft housing remains unaltered.

---

### **Cons of Victor Reinz 81-37122-00**

1. **Not OEM-Level Quality**

- While Victor Reinz is a **high-quality aftermarket brand**, it is **not the same as a genuine BMW seal**. OEM seals (e.g., from BMW or Mahle) may have **slightly better material consistency** in some cases, though the difference is often negligible for most drivers.

2. **Installation Can Be Difficult**

- Replacing the rear crankshaft seal requires **removing the transmission, flywheel, and crankshaft**, which is a **labor-intensive job**. Even with the right tools (e.g., seal driver, torque wrench), improper handling can damage the seal or crankshaft. This makes it a **better job for experienced mechanics** unless the owner is confident in their DIY skills.

3. **Potential for Leaks if Installed Incorrectly**

- If the seal is **not lubricated properly, not seated correctly, or damaged during installation**, it can lead to **oil leaks** over time. This is a risk with any aftermarket seal, though Victor Reinz s design minimizes this risk.

4. **Limited Longevity in Extreme Conditions**

- In **high-performance or heavily modified engines** (e.g., forced induction, aggressive driving, or extreme temperatures), some users report that aftermarket seals may **wear out faster** than OEM parts. However, this is not a universal issue and depends on driving habits and maintenance.

5. **Mixed Reviews on Durability in Some Cases**

- While most users report **good longevity**, a small percentage of owners (especially those with **high-mileage or poorly maintained engines**) have experienced **premature failure** (e.g., cracking or leaking within 2-3 years). This is more common with **cheaper seals** but can occasionally happen with Victor Reinz as well.

6. **No Free Replacement Under Warranty for All Issues**

- Victor Reinz s warranty typically covers **manufacturing defects**, but **wear and tear from improper installation or misuse** may not be covered. This means if the seal fails due to **user error**, the buyer may be responsible for replacement costs.

7. **May Require Additional Sealant**

- Some installers recommend using a **high-quality sealant (e.g., Permatex Ultra Black or Loctite 577)** to ensure a perfect fit and prevent leaks. Failure to do this could void any claims under warranty.

---

### **Conclusion**

The **Victor Reinz 81-37122-00** is a **strong, cost-effective choice** for replacing the rear crankshaft seal on a **2007-2009 BMW X5 (E70) with N52/N54 engines**. It offers **reliable performance, ease of sourcing, and a good balance between price and quality**. While it is **not OEM-level**, it is **far superior to generic or ultra-cheap alternatives** and has earned a **solid reputation among BMW owners and mechanics**.

That said, the **biggest drawback is the complexity of installation**, which makes it a **better fit for professional mechanics** unless the buyer is **highly experienced with engine work**. If the seal is **installed correctly with proper lubrication and sealant**, it should provide **several years of leak-free service**.

---

### **Recommendation**

- **Buy the Victor Reinz 81-37122-00** it s a **great value** and widely available. Follow **precise installation steps**, use **high-quality sealant**, and ensure the **crankshaft and housing are clean and dry** before fitting.

- **Consider additional tools** like a **seal driver, torque wrench, and a transmission jack** to make the job easier.

- **Have a trusted BMW mechanic** (preferably one with experience in **N52/N54 engines**) perform the replacement. While Victor Reinz is reliable, **poor installation is the #1 cause of seal failure**, so professional handling is ideal.

- Ask the mechanic if they **prefer Victor Reinz or another brand** (e.g., **Mahle, Fel-Pro, or OEM**) based on their experience.

- **Consider an OEM or high-end aftermarket seal** (e.g., **Mahle 13650000000 or Fel-Pro 20400**). These may cost **2-3x more** but offer **slightly better material consistency** and sometimes **longer warranties**. However, for most drivers, the **Victor Reinz is more than sufficient**.

- Double-check that the **part number matches your exact engine variant** (N52 vs. N54) and **transmission type** (if applicable). Some seals may vary slightly between **automatic and manual transmissions**, though this is rare for the X5 E70.

- **Low oil levels or poor-quality oil** can accelerate seal wear. Use **BMW-approved oil (e.g., 5W-40 or 0W-40)** and **change it regularly** to extend the seal s lifespan.

---

**Victor Reinz 81-37122-00 is an excellent choice** for most BMW X5 E70 owners replacing their rear crankshaft seal. It strikes a **strong balance between cost, quality, and reliability**, making it the **best aftermarket option** for this application. **Installation quality is the key factor** whether you do it yourself or have a pro handle it, proper technique will ensure long-lasting performance.

Details:

Do you recognize the name on box. Designed to deliver trouble-free, consistent performance. And how do you know if you re getting the best price. Manufactured to meet or exceed strict quality requirements.

You won't have those concerns with replacement parts. This product is made of high-quality components to meet and exceed strict quality requirements. Specifications: Size: 90 x 110 12mm. Notes: Also use: 1 83 19 439 030 sealing compound, 7 515 683 primer and 2 345 991 nozzle.

Rear Crankshaft Seal 81-37122-00 by Victor Reinz. Features: Made with precision and quality in mind. It carries everything from gaskets and seals to repair oil leaks, engine control system sensors make that dash light go out, parts like camshafts timing chains for major repairs. Designed to meet your specific needs.

part #: 813712200 prices

• $30.43-$38.68

specifications cranshafengin:

• for makes: Bmw
• for years: 2007-2009
• brand: Victor Reinz
• mpn: 81-37122-00
• product type: Engine
• upc: 884109863618
• fitment type: Direct Replacement
• compatible model s : X5, X3, Z4, X6, 325i, 328i Xdrive, 328i, 335i, 335i Xdrive, 328xi
• product subtype: Crankshafts
• placement on vehicle: Rear
• type: Seals Gaskets
• product details: Engine Crankshaft Seal
• department: Replacement

offer cranshafengin:

• started: March 17, 2026
• availability: In Stock
• quantity: 5
• options: Ship-to-home
• sold: 0

seller cranshafengin:

• # reviews: 151712
• city: Saint Paul, Minnesota
• rating: 99.1%

returns cranshafengin:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

payments cranshafengin:

• other
• credit card: Visa
• wallet: Google-pay

general cranshafengin:

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

shipping cranshafengin:

• cost: $18.29
• transit: 2-4 Days
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• type: Calculated

Victor Reinz 81-37122-00 Is Similar To:

• 0179977447 Victor Reinz New Rear 4026634102220 (35.7% similar) Vehicles sold outside of the USA may be different, even if they have same make and model name. Shipping labels may only be applied to a separate, outer box...(January 10th, 2018)
• 048-115-147 Victor Reinz Porsche Crankshaft Seal Oil Pump Part (50% similar) Buyer pays return shipping. Victor Reinz new front crankshaft seal oil pump for 924 Porsche's part 147BOX also has listed on it...(August 13th, 2018)
• 068103051g Victor Reinz Rear Main (40.4% similar) I got for a project and never used. Rear mail seal Victor Reinz. New condition never installed...(December 13th, 2017)
• 11 14 1 432 240 Victor Reinz (25.5% similar) Bmw E30 E34 z3 E36 E39 E46 E60 gasket for crankshaft seal housing part fits: rear brand new with full 1 year warranty. Bmw part 240 made by Victor Reinz if you are not sure about the fitting your car, please e-mail us cars vain. May get any for car want. 9l l4 position qty: rear z3...(February 25th, 2018)
• 11147512100 Victor Reinz Sealing Products Bmw Crankshaft (49.2% similar) I E71, E72 550 F07 F10 F11 650 F12 F13 7 F01, F02 hybrid 77 F02, F04 7750 750 E60 E61 E63 i,li E65, E66 E64 F01,F02. Fits: I E60 735I E65, E66 740 i,li 545 E61 645 Ci E63 E64 745 x5 I E71 x6 I E70 x6 E71, E72 hybrid X6X6...(February 25th, 2018)
• 46293 Victor Reinz Ft Crankshaft Seal Ford Aerostar Bronco Econoline Van (43.5% similar) Inc 6546HG4ZBMLRA1. The shipping calculator is not always accurate and doesn list all options. May fit other vehicles. Offering a new old stock front crankshaft seal from Victor Reinz, part many different variables go into vehicle applications engine size, transmission, model, brake system, wheel ...(June 18th, 2018)
• 65025sf Victor Ft Crankshaft Seal Regal Lesabre Skylark Monte Carlo Cutlass (34% similar) It may have factory or storage imperfections, blemishes, dings, dimples, etc. Inc 6543HG4ZBMLRA2. A new old stock part does not mean that it is identical to original or in perfect condition...(June 18th, 2018)
• 66941 Victor Reinz Rear Engine Crankshaft Seal 00725975288979 (52% similar) Just the option. Your satisfaction is our motivation. Our expertise your car is one of most important investments so we treat vehicle as the asset it...(January 8th, 2019)
• 67709 Victor Reinz Hemi Rear Crankshaft Oil Seal And Retainer Gasket (52.2% similar) ...(June 21st, 2018)
• 67729 Victor Reinz Rear Engine Crankshaft Seal 00027067495402 (52% similar) Our expertise your car is one of most important investments so we treat vehicle as the asset it. Just the option. Your satisfaction is our motivation...(January 8th, 2019)
• 67774 Victor Reinz Rear Engine Crankshaft Seal 00027067720375 (52% similar) Our expertise your car is one of most important investments so we treat vehicle as the asset it. Just the option...(January 8th, 2019)