BMW Guibo Bolt Size Guide: Exact Measurements & Compatibility

For BMW Guibo engine upgrades, understanding the correct bolt size is critical to ensure safety, performance, and longevity—avoiding costly damage from mismatched hardware.

The BMW Guibo bolt sets typically feature a size range of M10x1.5 to M12x1.6, with thread pitch varying between 1.25mm and 1.5mm depending on engine variant. These measurements are crucial when replacing spark plug, fuel injector, or engine mount bolts. Always verify dimensions using a calibrated caliper and cross-reference with your Guibo serial number for accuracy.

While most Guibo models use standard M10 or M12 bolt patterns, minor variances exist in head and transmission mounts. Consult the service manual for exact bolt sizes—especially when integrating with OEM components. Using incorrect bolt sizes risks thread stripping, misalignment, and long-term engine failure. Always source bolts from reputable suppliers with ISO-compliant specifications.

When installing BMW Guibo bolts, use torque specifications of 25–40 Nm to prevent overtightening. Apply anti-seize compound to threaded areas to ensure smooth removal. Ensure all surfaces are clean and free of debris before tightening. After installation, perform a gentle vibration check to confirm secure fitment—critical for vibration-prone engine zones.

Choosing the right BMW Guibo bolt size is non-negotiable for reliable engine performance. Verify measurements precisely, match compatibility, and follow installation best practices. For expert bolt solutions, trust authorized suppliers and consult technical guides to maintain your engine’s integrity and efficiency.

The latest size is 58mm (M12x58), which replaces the previous longer 62mm length (M12x62). While being 4mm shorter than the original 62mm used on some models, this 58mm is still within BMW's spec and works for a wide range of applications. This is a Genuine BMW guibo bolt with a two year warranty.

All of the BMW shops I have worked for use OE BMW guibo bolts and either Winzer, Wurth, or factory pinch lock nuts. BTW the part number for the correct factory bolts is 26 11 1 209 498 while the nuts are # 07 12 9 964 672. BMW FLEX-DISC REPLACE (Guibo) All times are GMT -5.

The time now is 09:39 AM. Bmw m12x1.5 x 70mm I need these shipped to La, new they're very expensive so was looking for used cheaper alternatives, they should be 10.9 grade I just replaced my M12 Guibo bolts and nuts. The bolts are 10.9 grade and were about $10 per bolt and nut.

The 5 year old bolts didn't need to be replaced,so I have a set if you want to buy them. BMW recommends replacing the self-locking nuts, but I also like to replace the bolts if they happen to look like they have become slightly corroded. Take your new flex disc and attach it onto the driveshaft.

If you look closely at Figure 14, you will see that the flex disc has an arrow that is cast into the side of the rubber disc. Bimmerforums is the preferred online BMW Forum and community for BMW owners. At Bimmerforums, you will find technical how.

All BMWs with a manual or SMG transmission (even some select automatics too) have a guibo (also known as a flex disc). This disk is located between the output shaft of the transmission and the front half shaft (tri-flange) of the drive shaft. Find BMW driveshaft and axle shaft parts, including flex discs (aka: the guibo) is a vibration dampener mounted on the back of the transmission.

The flex disc acts as a buffer between the transmission's output shaft and the driveshaft leading back to the car's differential. Driveshaft Flex Disc (Guibo), Meyle HD - Many BMWs (See List) Upgraded driveshaft flex disc to restore driveline smoothness and last longer. Heavy duty version of BMW part # 26117511454 Special Application Notes: Please see full detailed list of fitments, as many fitments are dependent on the transmission / drivetrain.

BMW OEM GENUINE DRIVELINE GUIBO FLEX JOINT BOLTS (M12X1,5X58-ZNS3) & NUTS (M12X1,5-10-PHR) IN GREAT WORKING CONDITION. SET INCLUDES 6 HEX BOLTS & 6 SELF LOCKING HEX NUTS AS SHOWN. Electric/Manual, Leather/Vinyl, Sport/Standard etc.