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Febi 21586 Engine Cylinder Head Bolt

Brand	Febi 21586
Length under Head (mm)	133.0
Outside Thread	M11 x 1.5
Product line	febi
Fits	Audi and Volkswagen · 39 vehicles

Cylinder head bolt. Engine hardware with M11 x 1.5 outside thread.

Precision fit. 133.0 mm length under head for accurate fastening.

Cross-references 078 103 385 G and 078 103 385 K for the same application. See all 2.

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Febi Cylinder Head Bolt for Audi and Volkswagen

Febi part 21586 is an engine cylinder head bolt with an M11 x 1.5 outside thread and 133.0 mm length under head. It is a direct-fit hardware choice for select Audi and Volkswagen applications that require this thread size and bolt length.

Key Features

Engine cylinder head bolt for engine hardware service
Length under head: 133.0 mm
Outside thread: M11 x 1.5
Febi part number 21586 for catalog and cross-reference use
Fits select Audi A4, A4 Quattro, A6, A6 Quattro, S4, Allroad Quattro, and Volkswagen Passat applications

Product Details

Febi 21586 is built for engine cylinder head fastening where the specified M11 x 1.5 thread and 133.0 mm under-head length are required. This hardware is listed for 1996-2005 Audi A4 and A4 Quattro, 1997-2004 Audi A6 and A6 Quattro, 2000-2002 Audi S4, 2001-2005 Audi Allroad Quattro, and 1997-2005 Volkswagen Passat applications. The part number 21586 is also useful when matching service records or OE-style replacement references.

This part cross-references OE numbers 078 103 385 G and 078 103 385 K for the same application.

What It Is Used For

Replacing a stretched, damaged, or corroded cylinder head bolt
Restoring proper cylinder head clamping force during engine service
Addressing head gasket service that requires new fastening hardware
Matching the correct M11 x 1.5 thread specification for listed Audi and Volkswagen engines
Supporting accurate reassembly after cylinder head removal

Installation Notes and Tips

Verify the bolt length under head and thread specification against the engine code before installation. Clean the threaded holes and mating surfaces, and follow the factory tightening sequence and torque procedure for the specific engine. Because cylinder head fasteners are critical engine hardware, confirm fitment by VIN, engine code, and OE reference before assembly.

Quality Assurance

Febi is a recognized aftermarket brand for engine hardware and replacement components. Part 21586 is cataloged for direct application matching on the listed Audi and Volkswagen vehicles.

This part fits 39 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2005	Audi	Allroad Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2005	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2004	Audi	A6 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2004	Audi	Allroad Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2004	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2003	Audi	A6 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2003	Audi	Allroad Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2003	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2002	Audi	A6 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2002	Audi	Allroad Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2002	Audi	S4	—	—	N/A	Outside Thread 1: M11; febi
2002	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2001	Audi	A4	2.8L	V6	N/A	Outside Thread 1: M11; febi
2001	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2001	Audi	A6	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2001	Audi	A6 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2001	Audi	Allroad Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2001	Audi	S4	—	—	N/A	Outside Thread 1: M11; febi
2001	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2000	Audi	A4	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2000	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2000	Audi	A6	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2000	Audi	A6 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
2000	Audi	S4	—	—	N/A	Outside Thread 1: M11; febi
2000	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1999	Audi	A4	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1999	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1999	Audi	A6	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1999	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1998	Audi	A4	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1998	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1998	Audi	A6	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1998	Volkswagen	Passat	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1997	Audi	A4	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1997	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1997	Audi	A6	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1997	Volkswagen	Passat	2.8L	V6	N/A	Outside Thread 1: M11; febi
1996	Audi	A4	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
1996	Audi	A4 Quattro	—	—	N/A	Length 1 (mm): 138; Outside Thread 1: M11
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Directly replaces or cross-references 2 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

078 103 385 G078 103 385 K