Aluminum Stretch Bolts are compatible with 6-cylinder BMW engines.

Press Release Summary:

Rein Automotive® Aluminum Stretch Bolts are offered as replacements for one-time-use fasteners used by BMW to mount such components as transmissions, oil pans, water pumps, power steering pumps, and alternators to engine assemblies. These products are available for 6-cylinder engines on BMW models from 2006 onwards.

Original Press Release:

CRP Automotive Offers REIN Automotive Aluminum Stretch Bolts for BMW 6-Cyl Engine Applications

- Specially designed for mounting transmission, oil pan, water pump, power steering pump, and alternator

Cranbury, NJ – CRP Automotive, a leading source of OE-quality replacement parts for European and Asian import vehicle applications, now offers Rein Automotive® Aluminum Stretch Bolts for BMW engine applications. These stretch bolts are designed as replacements for the “one time use” only fasteners used by BMW to mount components such as transmissions, oil pans, water pumps, power steering pumps, and alternators to their engine assemblies.

Rein Automotive Brand Manager, Paul Swyter, explains, “BMW uses a magnesium-aluminum composite to make their 3.0 in-line six, one of the world’s lightest 3.0 liter gas engines.  While this reduced weight improves performance, efficiency, and overall block strength, it comes at a price. The magnesium in the block can cause electrochemical corrosion from contact with other materials such as iron. As a result, steel bolts cannot be used in engine assembly and BMW has specified the use of specially designed aluminum stretch bolts.”

Swyter also notes, “However, to ensure proper fastening these bolts are designed for “one-time-use” only. Reusing them or using the wrong bolts can result in improper torqueing, loosening, breakage, or thread damage in the block.

The new line of stretch bolts from Rein Automotive is designed as a direct replacement for the OE bolts and meets BMW specifications. CRP Automotive offers a full range of Rein Automotive Aluminum Stretch Bolts for six-cylinder engines on BMW models from 2006 and up.

About Rein Automotive

The Rein Automotive program consists of OE-quality replacement parts and accessories for a wide range of European import applications, including A/C parts, coolant hoses, anti-vibration, and suspension parts, axle boot kits, and wheel bearings and bearing kits. It also includes the Rein First Aid program, a special selection of parts for European vehicle applications that have higher failure or replacement rates. The program features shaped breather hoses, axle boot kits, fuel, oil and coolant caps, dipsticks and dipstick funnels, power steering and oil cooler hoses, switches, sensors and relays, and power steering fans and boot kits.

Easy Online Lookup

Rein Automotive parts can be easily found on CRP’s online application catalog, which can be accessed through the CRP Rein Automotive brand website,, or Show Me the Parts,

About CRP Automotive

CRP Automotive is a part of CRP Industries, a leader in the marketing and supply of automotive parts and industrial products. CRP Automotive provides some of the industry’s leading brand names, including ContiTech Automotive Belts, Rein Automotive® Parts and Accessories, Pentosin Technical Fluids, AJUSA Engine Parts, and FERTAN Rust Treatment Products. All products are backed by the CRP promise of quality and superior service. Founded in 1954 as the North American partner of Continental AG, CRP Automotive has established a solid reputation for exceeding its customers’ expectations. CRP maintains key distribution centers in New Jersey, California, and Mexico.

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