BMW 1731905 Water Pump Pulley 850I 850CI 850SCI

( Manufacturer Part Number: 1731905 ), ( Part Type: Pump ), ( Manufacturer Warranty: 1 Month )

Review BMW 850ci Water Pump Pulley Oem fits E31 M70 1991–1996

The BMW 1731905 water pump pulley is an essential component of the cooling system for various BMW models produced between 1991 and 1996, specifically the E31 850i, 850ci, and 850sci, as well as the M70 engine-equipped M5 and M7 models.

This pulley plays a crucial role in driving the water pump, which circulates coolant throughout the engine to maintain optimal operating temperature. The pulley is designed with a robust construction to handle the demands of high-performance engines, ensuring reliable and efficient cooling performance.

Measuring approximately 285mm in diameter and 48mm in width, this pulley features a smooth, precise fit with the engine crankshaft and water pump. Its durable design is made from high-quality materials that can withstand the rigors of daily driving, as well as the demands of track use or high-performance driving.

The pulley boasts a sleek and modern design, with a low-profile and streamlined shape that helps to reduce air turbulence and improve overall cooling system efficiency. Its smooth surface is engineered to minimize friction and wear, ensuring a long service life and optimal cooling performance.

Installation of the BMW 1731905 water pump pulley is a straightforward process, with clear instructions provided to ensure a trouble-free installation. The pulley comes complete with all necessary hardware, including bolts and seals, to make the process as convenient as possible for the end user.

In summary, the BMW 1731905 water pump pulley is a vital component of the cooling system for various BMW models, ensuring reliable and efficient engine cooling performance. Its robust construction, sleek design, and easy installation make it an ideal choice for BMW enthusiasts seeking to maintain the performance and longevity of their vehicles.

Buying a BMW E31 850i, 850ci, 850sci, or M70 water pump pulley (BMW part number 1731905) involves considering both advantages and disadvantages. Here's a breakdown of each:

1. OEM Part: Purchasing an original BMW water pump pulley ensures a perfect fit and compatibility with the engine, providing optimal performance and reliability.

2. Superior Quality: BMW parts are known for their high-quality materials and engineering, which can lead to better durability and longevity compared to aftermarket alternatives.

3. Peace of Mind: By using an OEM part, you can have confidence that the part will function correctly and meet the manufacturer's standards, reducing the risk of future complications.

1. Cost: Original BMW parts, including the water pump pulley, are often more expensive than their aftermarket counterparts. This could be a significant consideration for those on a budget.

2. Availability: BMW parts, especially for older models like the E31, may not be readily available from local dealerships or retailers. This could result in longer wait times for delivery or installation.

3. Limited Customization: Since OEM parts are designed to meet BMW's specifications, they may not offer the same level of customization as aftermarket alternatives.

When deciding whether to buy a BMW E31 850i, 850ci, 850sci, or M70 water pump pulley (part number 1731905), it's essential to weigh the advantages and disadvantages carefully. If you prioritize originality, reliability, and peace of mind, an OEM water pump pulley may be the best choice for you. However, if cost and availability are significant concerns, an aftermarket alternative could be a more practical option. Ultimately, the decision depends on your personal preferences and priorities.

If you value originality, reliability, and are willing to pay a premium for an OEM BMW water pump pulley, then go ahead and make the purchase. However, if you're budget-conscious or prefer a more readily available and cost-effective alternative, consider exploring aftermarket options from reputable manufacturers. Regardless of your choice, always ensure that the part is compatible with your specific BMW model and engine configuration.

Details:

Shipping costs are only covered on a case-by-case basis. 1991 BMW 850I E31. 1991 1996 BMW E31 850I 850Ci 850SCi. M70 WATER PUMP PULLEY.

part #: 1731905 prices

• $75.00-$949.04

specifications pulleyhop:

• for models: E31, M70
• for makes: Bmw
• for years: 1991-1996
• mpn: 1731905
• part type: Pump
• manufacturer warranty: 1 Month

shipping pulleyhop:

• type: Fixed
• service: Standard
• transit: 2-6 Days
• class: Standard
• cost: $12.00

general pulleyhop:

• Car Truck Parts Accessories > Accessory Belts > Pulleys
• condition: Used

payments pulleyhop:

• wallet: Paypal
• other
• credit card: Visa

returns pulleyhop:

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

seller pulleyhop:

• rating: 99.5%
• city: Dallas, Texas
• # reviews: 373

offer pulleyhop:

• started: November 4, 2025
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• best offers: True

Bmw 1731905 Is Similar To:

• Bmw 11237573655 1123 7573655 F30 F32 F36 F15 F16 335 435 X5 X6 M2 N55 Engine Vibration Damper Pulley Oem (36.7% similar) No guarantee of color match for exterior or interior parts. 30 day warranty. 2013 bmw F10 535I N55 engine core 175K miles. 24 turn-around time with priority mail shipping. Inventory: box E04 engine parts...(May 16th, 2024)
• Bmw 11288604266 1128 8604266 11-19 335 435 640 740 X5 X6 N55 Engine Serpentine Belt Tensioner Pulley Oem (39.1% similar) Inventory: box E04 engine parts. No guarantee of color match for exterior or interior parts. 2013 bmw F10 535I N55 engine core 175K miles. 30 day warranty. 24 turn-around time with priority mail shipping...(May 17th, 2024)
• Bmw 309-50608 Crankshaft Pulley From 2010 X5 4.8 (40.7% similar) Please replace such items as required for proper installation. Fitment type: x5 07-10 4.8L...(May 18th, 2024)
• Bmw 11231738620 1123 1738620 E36 E39 3 5 Series M3 M50 M52 S52 Engine Crank Pulley Vibration Damper Oem (36.9% similar) Color code: n green 275. No guarantee of color match for exterior or interior parts. 1998 bmw E36 328I 258K miles M52 F manual. 30 day warranty...(May 19th, 2024)
• Bmw 11511739527 1996-2002 Z3 Roadster E36 7 Water Pump Pulley Oem Part (54.8% similar) Parts other than those originally sold or which have been altered damaged are not acceptable for return...(May 20th, 2024)
• Bmw 11282245087 1996-2002 Z3 Roadster E36 7 Adjusting Pulley Oem Part (43.3% similar) Parts other than those originally sold or which have been altered damaged are not acceptable for return...(May 20th, 2024)
• Bmw 11231726351 E30 M20 Crankshaft Vibration Damper Pulley Balancer 325i 325is 325ix 525i (34.6% similar) Includes everything pictured. Missing 2 washers for the little 10MM bolts. In good shape removed from M20B25...(May 21st, 2024)
• Bmw 1432471 Oem E46 Harmonic Balancer Crankshaft Pulley 99-00 323i 328i (32.4% similar) Part # 1432471, removed from a 1999 bmw 323I. Silver exterior, black interior. Free of excess wear and damage. Manual transmission. Guaranteed fully functional!, oem bmw E46 harmonic balance crankshaft pulley, 99-00 323I 328I, good used condition. Please verify fitment using the part #...(May 23rd, 2024)
• Bmw 11237558082 E60 E90 E82 E92 F01 F02 E71 N54 Engine Crankshaft Pulley Harmonic Balancer (27.1% similar) All electronics are tested before removed from vehicle. Shipping prices for ground apply only to the continental USA...(May 30th, 2024)
• Bmw 1123 7 546 087 2006-2007 525i Harmonic Balancer Crankshaft Crank Pulley 7546087 Vn38 (32.3% similar) Please review all the pictures and read carefully. May be a little dusty from storage use and have few minor scratches. Part number. Part fitment. Bmw with N52, this part is in good working condition. This is an original part oem not aftermarket. The compatibility we...(June 6th, 2024)
• Bmw 7934465 16-18 330e Harmonic Balancer Crankshaft Pulley Vibration Damper Oem (41.7% similar) Buyer pays for all return shipping costs. This listing is for a used bmw oem, harmonic balance crankshaft pulley vibration damper, donor vehicle: 2017 330E performance F30 RWD B48X 2.0L. Local pick-up is available if prior arrangements are made...(June 12th, 2024)