2008 Nissan Altima Motor Mount | Diagnose & Replace

The passenger-side torque strut mount on the 2008 Nissan Altima 2.5L fails most often, causing clunking and vibration during acceleration.

The 2008 Nissan Altima 2.5L has a known weak point: the passenger-side torque strut mount. When it goes bad, you get a clunk during acceleration or shifting and noticeable vibration at idle. The good news is the fix is straightforward and affordable if you handle it yourself. This article covers which mount fails, what you’ll pay to replace it, and exactly how to swap the part.

Which Mount Fails First on the 2008 Altima?

The passenger-side torque strut — a hydraulic mount — is the most common failure on the 2.5L QR25DE engine. It produces a distinctive clunking noise when you accelerate or shift, along with vibration that you can feel through the steering wheel and floorboard at idle. The driver-side mount is a solid rubber unit that typically lasts longer, but both should be checked when one fails.

The 3.5L VQ35DE V6 uses different mounting brackets and bolt patterns entirely. Parts intended for the 2.5L won’t physically fit a 3.5L car, and the reverse is also true. The Altima Hybrid (2007–2012) uses its own dedicated rear mount insulator, Part #11320JA80A.

On the 2.5L engine, the OEM front torque strut insulator is Part #11210JA000, and the driver-side mount bracket is #11253JA010. Nissan’s OEM parts catalog for the 2008 Altima 2.5L shows the full assembly with diagrams.

2008 Altima Motor Mount Replacement Cost

Going the DIY route drops the parts cost significantly. Aftermarket mounts range from $40 to $100 per mount, while genuine Nissan mounts cost $150–$250 each.

Most 2008 Altimas are now well past 100,000 miles. If one mount has failed from age and wear, the others are likely close behind. Replacing both at the same time prevents uneven stress on the new part and saves you from doing the job twice. Our recommended replacements for the 2008 Nissan Altima motor mount cover the best options across every price range.

How to Replace the Passenger-Side Torque Strut Mount

This procedure applies to 2007–2012 Altima 2.5L models. You’ll need an 18mm crowfoot wrench, 13mm and 18mm sockets, a floor jack, a 2×4 block, a 5mm hex wrench, and a torque wrench.

1. Support the engine. Place a floor jack with a 2×4 block under the oil pan. Apply just enough pressure to hold the engine’s weight — do not lift the car off the jack. Position the wood so it clears the plastic oil pan cover to avoid cracking it.
2. Remove the plastic cover. Use a 5mm hex wrench to remove the three bolts holding the engine mount cover, then pop the retaining clip free and lift the cover off.
3. Loosen the torque strut bolt. The main 18mm bolt on the passenger-side mount is often seized from heat and corrosion. Use an 18mm crowfoot wrench with an extension to break it loose, then finish removal with a ratchet.
4. Remove and replace the mount. Pry the bracket free from the chassis if needed. Position the new mount and insert the bolts loosely — do not tighten them yet. This allows for alignment adjustments.
5. Align and torque. Lower the engine slightly with the jack to align the bolt holes. Tighten the bolts gradually, alternating between them to seat the mount evenly.
6. Reinstall the cover. Replace the three Allen bolts and snap the retaining clip back into place.

Common mistakes: The most critical error is removing the mount without supporting the engine — it drops onto the transmission or oil pan. Over-torquing cracks the rubber in the new mount, while under-torquing causes vibration. Using a mount meant for the 3.5L engine on a 2.5L car simply won’t physically fit.

Start the engine and take a short drive. The clunking during acceleration and the vibration at idle should be gone. If vibration remains, the mount may not be seated fully or torqued correctly.

FAQs

How do I know if my 2008 Altima motor mount is bad?

The clearest signs are a clunking noise when you accelerate or shift gears, excessive vibration through the cabin at idle, and visible cracking or separation of the rubber on the mount. The passenger-side torque strut is almost always the first to fail on this generation.

Can I replace just one motor mount?

You can replace only the failed mount, but if one has given out from age and mileage, the others are likely worn too. Replacing both the torque strut and the driver-side mount prevents uneven stress and avoids doing the job again soon.

What is the torque spec for the 2008 Altima motor mount bolt?

A torque wrench is essential here — guessing the tightness usually leads to under-torquing, which causes vibration, or over-torquing, which cracks the new mount’s rubber.