Toyota Prius Engine Mount: Specs, Fitment & Common Faults

A genuinely important compatibility warning: hybrid and non-hybrid mount part numbers commonly differ — plus why a worn mount makes engine start-stop feel harsher.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — engine mount (aftermarket) Febest TMB-321

Accuracy note: Covers the Toyota Prius (2016-) as listed in the UK aftermarket catalogues. Engine mounts are sold by position (left, right, front, rear, upper, lower), and the right one depends on the engine, the gearbox (manual, automatic or dual-clutch) and the trim. The references below are examples from the UK aftermarket catalogue for the engines checked on this generation, so match your own engine code and gearbox before ordering; the carmaker's own numbers are not quoted in those listings, so check the genuine mount against your VIN if you want a guaranteed match.

Engine Mount — Lower (aftermarket)	Febest TMB-321
Genuine (OE) number	Not quoted in the catalogue listings — mounts differ by engine and gearbox, so order the genuine ones against your VIN
Fitment notes	The listing above shows examples for the engines checked; petrol, diesel, manual and automatic versions often use different mounts, and cars usually have more than one mount.

A Genuinely Important Compatibility Warning Worth Knowing — Toyota Prius Engine Mount

If your car has both hybrid and non-hybrid variants, this is genuinely worth knowing: hybrid and non-hybrid models commonly use different engine mount part numbers, despite looking broadly similar. Always verify your exact engine type before ordering a replacement mount, since fitting the wrong variant is a genuine, documented mistake worth avoiding.

Worth knowing if your car is a hybrid specifically: a worn mount can make the engine's frequent automatic starting and stopping (a normal characteristic of how the hybrid system operates) feel considerably harsher and more noticeable than it should — if this transition has started feeling like a jolt rather than a smooth changeover, a worn mount is genuinely worth investigating.

It's also worth knowing that excessive vibration at idle, particularly noticeable when stopped in Drive or Reverse and lessening in Park or Neutral, is the most common documented symptom of a failing mount — worth checking this specific pattern before assuming a more complex engine fault.

Toyota Prius Engine Mount: Watch: Replacing It

🎬 Watch: 2010-2015 Toyota Prius install engine mount

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This video is of an earlier generation of the same model; the job is similar but the mount positions and fixings can differ slightly.

Toyota Prius Engine Mount reference plate

Toyota Prius Engine Mount: What It Does

Engine mounts secure the engine and transmission to the chassis while absorbing vibration and movement, preventing that vibration from transferring directly into the cabin. Most versions of the Prius use several mounts working together — typically at least one on each side of the engine plus a torque mount — and a single failed mount can throw off the whole assembly's balance.

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Toyota Prius Engine Mount: Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Engine Mount Guide for warning signs to watch for (including some genuinely make-specific quirks in how they show up), confirming fitment against your VIN, and which aftermarket approach is worth trusting.

More Toyota Engine Mount

The same part, covered across other Toyota models.