Honda OEM 90181-S84-A00 – rear trailing arm bolt / rear shock bolt 12x68

The 90181-S84-A00 is a genuine Honda OEM suspension bolt with size 12 x 68 mm. Depending on the vehicle and suspension design, it is used either as a rear trailing arm bolt or as a rear shock absorber bolt. OEM hardware ensures correct length, thread, and clamping force exactly as specified by Honda.

This type of fastener works in a high-load area exposed to vibration, road grime and corrosion. Using the correct OEM bolt helps maintain proper suspension geometry and prevents issues caused by incorrect aftermarket hardware (wrong shank length, thread tolerance, or strength class).

Technical details

• OEM part number: 90181-S84-A00
• Size: 12 x 68 mm
• Type: suspension mounting bolt (Honda OEM)

Application – rear trailing arm bolt

• Acura TLX 2015–2020
• Honda Accord 2D 2008–2017 (US market)
• Honda Accord 4D 1998–2015
• Honda Accord 5D 1999–2002
• Honda Accord Coupe 1998–2002
• Honda Accord Crosstour 2010–2012 (US market)
• Honda Accord Tourer 2009–2015
• Honda Crosstour 2011–2015 (US market)

Application – rear shock absorber bolt

• Honda Civic 3D 2001–2005
• Honda Civic 4D 2001–2005
• Honda Civic 5D 2001–2005
• Honda Civic Coupe 2001–2005
• Honda Civic Hybrid 2003–2005

When should you replace this bolt?

• during trailing arm or rear shock replacement,
• if the old bolt is seized, damaged, or heavily corroded,
• when the head/threads are rounded or the bolt was cut during removal,
• as part of a full rear suspension refresh.

Installation notes

• Tighten suspension bolts at normal ride height (loaded position).
• After trailing arm work, a rear alignment check is recommended.
• If removal required heat or cutting, replacing the bolt with OEM hardware is the safest option.

FAQ – Honda OEM bolt 90181-S84-A00 (12x68)

Is this bolt used for both the trailing arm and the rear shock?
Yes. Honda used the same bolt in different locations depending on model and suspension design. Always confirm by OEM number or VIN if you are unsure.

Can I replace it with a generic M12 bolt?
Not recommended. Even with the same diameter, generic bolts may differ in shank length, thread, strength grade, and fit, which can affect clamping force and suspension geometry.

Do I need a wheel alignment after replacement?
If the trailing arm mounting was loosened/removed, an alignment is recommended to keep the rear axle tracking correctly and to protect tyre wear.