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If your Lexus IS feels harsher than it used to or you notice more vibration under acceleration, the engine mounts could be the cause. Choosing the right engine mount matters because the mount absorbs engine movement, reduces noise, and protects drivetrain components from excessive stress. This guide presents the top shortlisted engine mounts for the Lexus IS, selected for their durability and ability to limit vibration and noise. We evaluated each option across build quality and vibration isolation to help you find the best fit for your driving needs. Read on for the full list and buying considerations.
Looking for other parts? See all Lexus IS parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | X AUTOHAUX Engine Torque Strut Mount 12363-20100 |  |
| Most Popular A crowd favorite that many people choose with confidence | Beck/Arnley Engine Mount (104-1903) |  |
| Best Quality Built to a higher standard if you want something more solid | A-Premium 4‑Piece Engine and Transmission Mount Kit for Toyota Camry / Lexus ES330 (2004–2006) |  |
| Best Budget The cheapest option that still gets the job done reliably | Beck/Arnley 104-1639 Engine Mount |  |
| Most Sold A high-volume bestseller chosen again and again | LOONGRIE Engine Torque Strut Mount Replacement (LG066) |  |
| Best Value for Money The sweet spot between price and what you get | X4XZ Front Torque Strut Mount (12363-31040) for 3.5L V6 Lexus RX350 / Toyota V6 Models |  |
| Best Overall The best all-around choice for most situations | Rockplanet Engine and Transmission Mount Kit (3‑piece) for Lexus RX350 / Toyota Sienna |  |
1. X AUTOHAUX Engine Torque Strut Mount 12363-20100
| Manufacturer | X AUTOHAUX |
|---|---|
| Position | Inner |
| Manufacturer Part Number | a23041700ux0033 |
This replacement torque strut mount is built to control engine movement and dampen clunks that occur when shifting between drive and reverse or during acceleration. It installs as a direct replacement and is typically used to restore factory-like stability after the original mount wears. The part features a metal body and a solid inner section aimed at resisting deformation and extending service life, which helps reduce vibration transmitted to the chassis. Practical benefits include straightforward installation and compatibility with the listed 12363-20100 fitment, making it suitable for a DIY swap or a quick shop replacement. Limitations are that the listing cites a single position application and does not include multiple mount types, so buyers should confirm exact fitment for their Lexus IS model year and engine before ordering. Expect a budget-friendly option focused on restoring stability rather than premium NVH isolation or long-term performance guarantees.
Best for: Reliability-focused buyers looking to restore factory-level engine stability and eliminate shift-related clunks with a straightforward replacement part.
Less Ideal for: Drivers seeking premium noise and vibration isolation upgrades or heavy-duty performance mounts for motorsport or heavily modified engines should consider higher-end alternatives.
- Direct-replacement design for the 12363-20100 fitment reduces installation hassle
- Sturdy metal body and solid inner section intended to resist deformation
- Addresses common symptoms like clunking and excess vibration during acceleration
- Simple installation suitable for DIY or quick shop replacement
- Fitment information is limited to the listed part number so confirmation for Lexus IS specifics is required
- Not presented as an upgraded or performance-oriented mount compared with heavy-duty aftermarket options
Verdict A practical, budget-minded replacement torque strut mount aimed at restoring factory stability and eliminating clunks, provided you verify exact Lexus IS fitment.
2. Beck/Arnley Engine Mount (104-1903)
| Manufacturer | Beck/Arnley |
|---|---|
| Model | ENGINE MOUNT |
| Exterior | Machined |
| Manufacturer Part Number | 1041903 |
This Beck/Arnley engine mount is a direct-replacement top mount designed to restore engine stability and reduce vibration when installed on a compatible Lexus IS. It installs in the engine bay to support and isolate engine movement under acceleration, deceleration and at idle. The unit is built to match factory form and fit and uses premium materials and a machined exterior intended to withstand underhood conditions. Buyers will appreciate that it includes application-specific fitment to simplify installation and that many owners find it straightforward to fit with basic hand tools. Practical benefits include noticeably reduced engine rocking and lower vibration transmitted to the cabin. Some users report occasional alignment fiddling during installation and a few long-term durability reports vary, so lifespan can depend on driving conditions and installation of the other mounts on the car. This part is best used as a like-for-like replacement when the top engine mount on a Lexus IS needs service and you want a convenient, factory-quality fit without modifying the vehicle.
Best for: Convenience-driven owners who prioritize a straightforward, factory-quality replacement that minimizes shop time and hassle when servicing a Lexus IS.
Less Ideal for: Drivers looking for performance-oriented mounts tuned for aggressive driving or motorsport should consider stiffer aftermarket options instead.
- Designed to match factory form, fit and function for straightforward replacement
- Premium materials and machined exterior intended for durability under the hood
- Application-specific fit reduces fitment guesswork during installation
- Simple installation with common tools for owners doing their own repairs
- Some users report minor fitment alignment is required during installation
- A few long-term reviews indicate variable lifespan compared with an OEM mount
Verdict A convenient, factory-fit top engine mount for a Lexus IS that restores stability with minimal fuss but may show variable long-term durability.
3. A-Premium 4‑Piece Engine and Transmission Mount Kit for Toyota Camry / Lexus ES330 (2004–2006)
| Vehicle fitment | Toyota Camry 2004-2006 V6 3.3L; Lexus ES330 2004-2006 V6 3.3L |
|---|---|
| Set contents | Front motor, Front right motor, Transmission, Front right torque strut |
| Transmission | Automatic |
| Manufacturer part number | APEM1118 |
This kit supplies the four main mounts you would replace when refreshing engine support on a 3.3L V6 automatic Camry or Lexus ES330 from 2004 to 2006. It includes front motor, front right motor, transmission, and torque strut mounts intended as direct factory-replacement style parts. In use the kit reduces engine movement and vibration compared with worn mounts, restoring crisper throttle response and steadier idling under load. The listing and photos indicate robust construction and claims of rigorous testing and factory-spec fitment. Some users report a center stud on the transmission mount that may need removal for certain installations, and a few buyers found fitment inconsistent across model years, so careful verification against your vehicle and a mechanic check are recommended before install. The set comes with a one-year unlimited-mileage guarantee from the brand which adds peace of mind for performance-focused drivers doing a full mount refresh.
Best for: Performance-oriented owners who prioritize restoring tight engine control and reduced drivetrain movement after worn mounts, and who plan to install a full mount set to regain factory-level responsiveness.
Less Ideal for: Buyers seeking a mount specifically validated for Lexus IS models or those who need plug-and-play guaranteed fit across multiple Lexus/Toyota build variants should consider alternatives with confirmed IS fitment.
- Complete four-piece kit covers all primary engine and transmission mount locations for a full replacement.
- Marketed as meeting or exceeding factory specifications, aiming for OEM-style fit and function.
- Includes transmission and torque-strut mounts which help reduce drivetrain lash and torque steer under acceleration.
- Some buyers report occasional fitment issues between production variants requiring minor modification.
- Transmission mount has a center stud that may need to be removed for installation in some cars.
- Not explicitly listed for Lexus IS models in the fitment details so compatibility with other Lexus models is not provided.
Verdict A practical four-piece replacement kit geared toward restoring firm, factory-style engine support on 2004–2006 3.3L Camry/ES330s, but verify fitment carefully before buying.
4. Beck/Arnley 104-1639 Engine Mount
| Mounting Type | Engine Mount |
|---|---|
| Position | Front |
| Manufacturer | Beck/Arnley |
| Unit Count | 1.0 Count |
This Beck/Arnley front engine mount replaces a factory-style mount to reduce engine vibration and restore proper engine positioning. It is intended to be used as a direct replacement during routine engine-mount service or when worn mounts cause vibration, engine movement, or drivetrain noise. The mount is described as matching OEM form, fit and function and uses hydraulic-style construction and premium materials to dampen vibration under typical driving conditions. Buyers will appreciate the application-specific fit and the inclusion of any small factory-style parts where applicable, which simplifies installation for a competent DIYer or independent shop. Limitations to consider are that finish and some nonfunctional rubber flash may differ from factory parts and a few customer reports cite inconsistent sourcing between production batches, so longevity can vary compared with higher-priced branded originals. If you need a low-cost, OEM-matching front mount to quiet vibration and restore engine alignment, this model is a practical budget option for compatible Lexus IS fitment when the part number matches the vehicle requirements.
Best for: Budget-conscious buyers who want a low-cost, factory-replacement style front mount to reduce vibration and restore engine alignment on a Lexus IS and prefer a practical, value-focused repair approach.
Less Ideal for: Drivers seeking the longest-lasting, premium factory-brand mount or those who prefer dealer-only parts and full brand-new OEM traceability should consider higher-tier alternatives.
- Designed to match OEM form, fit and function for foreign nameplate applications.
- Hydraulic-style construction and premium materials intended to dampen engine vibration.
- Application-specific design simplifies installation and helps ensure correct fit for the vehicle.
- Includes additional factory-style parts where applicable to reduce install time.
- Sourcing and finish can vary between production batches which may affect long-term consistency.
- Not a direct claim of extended durability compared with higher-cost factory-brand mounts.
Verdict A practical, budget-friendly front engine mount that matches factory fit and reduces vibration for compatible Lexus IS models, with some variability in finish and sourcing.
5. LOONGRIE Engine Torque Strut Mount Replacement (LG066)
| Manufacturer | loongrie |
|---|---|
| Part Number | LG066 |
| Unit Count | 1.0 Count |
| Compatible Engines | 3.5L V6 (listed applications) |
This LOONGRIE torque strut mount is a single-piece replacement intended to control engine movement and reduce vibration at the front of V6 engines. In practical use it bolts in where the factory torque mount sits and limits rocking under acceleration and deceleration, which helps stabilize driveline feel and reduce noise transmitted to the cabin. The listing highlights compatibility with 3.5L V6 applications and references several OEM part numbers for fit guidance. Buyers report straightforward installation in many cases and noticeably reduced vibration when the original mount showed wear. The part is positioned as a budget-friendly aftermarket alternative to a factory replacement, offering good material quality for the price. Possible downsides are occasional fitment variance across model years and a report of a unit that was longer than the factory piece, so confirming exact part numbers before ordering is important. Expect a solid functional replacement when the part number matches but be prepared to verify fit during installation.
Best for: Risk-averse mainstream buyers seeking a reliable, lower-cost replacement part to restore factory-like engine stability and reduce vibration without upgrading to performance mounts.
Less Ideal for: Drivers looking for a performance or heavy-duty upgrade or anyone unwilling to confirm exact part numbers and year-to-year fitment before purchase should consider alternatives.
- Designed to replace the factory torque strut mount and reduce engine vibration and movement
- References OEM part numbers to help confirm compatibility with affected vehicles
- Single-piece unit that installs in the factory mount location for straightforward replacement
- Many buyers report improved cabin smoothness and reduced driveline vibration after installation
- Fitment can vary by year and model causing some units to not align precisely with factory mounting points
- Not a multi-piece mount kit so additional hardware or bushings from other sources may be required in some repairs
Verdict A cost-conscious, factory-style torque strut mount that restores engine stability when the correct part number and fitment are confirmed.
6. X4XZ Front Torque Strut Mount (12363-31040) for 3.5L V6 Lexus RX350 / Toyota V6 Models
| Compatible engines | 3.5L V6 models listed |
|---|---|
| Manufacturer | X4XZ |
| Manufacturer Part Number | 12363-31040 |
| Unit count | 1.0 Count |
This front torque strut mount replaces the factory front engine mount on compatible 3.5L V6 vehicles and is intended to isolate and limit engine movement under load. It installs in the front torque strut location and uses a rubber-lined design to absorb vibration and reduce transmission of engine shake into the body. Typical use is a like-for-like replacement when a worn mount causes increased vibration, clunking under acceleration, or excess engine play. The part is metal with molded rubber and is sold as a single unit; it is marketed as a direct replacement that fits the factory mounting points so installation follows standard bolt-on procedures. Practical benefits include noticeably reduced vibration compared with a failing mount and a fit that customers report matches factory geometry. Limitations are that this is an aftermarket replacement rather than a factory part and the internal rubber detail differs from OEM in some reports, so long-term durability may vary compared with genuine factory-quality mounts.
Best for: Practical optimizers who want a budget-conscious, functional replacement that restores NVH control without paying for a factory part; ideal when you prioritize getting the car back to normal service quickly.
Less Ideal for: Buyers who require guaranteed factory-spec longevity or prefer to stick exclusively with manufacturer-branded parts should consider OEM replacements instead.
- Direct-replacement design that matches factory mounting points for straightforward installation
- Rubber-lined bushing to reduce engine vibration and noise transmission
- Single-piece unit sold ready to install with no additional parts required
- Multiple customer reports of good fit and immediate improvement in vibration
- Aftermarket part so rubber formulation and long-term durability may differ from factory-quality mounts
- No included installation instructions in the package
Verdict A cost-effective aftermarket front torque strut mount that restores engine vibration control with a factory-fit design but may not match OEM rubber longevity.
7. Rockplanet Engine and Transmission Mount Kit (3‑piece) for Lexus RX350 / Toyota Sienna
| Unit Count | 3.0 Count |
|---|---|
| Manufacturer | Kepler |
| Part Number | EMT42017Q3 |
This Rockplanet kit bundles the front engine mounts and a front lower transmission mount so you can replace multiple worn mounts in one job. It is intended as a direct replacement group and is typically used when vibration, clunks, or excessive engine movement appear at idle or under load. The listing calls out temperature and wear resistant materials plus an anti-corrosion coating, which in practice should help longevity compared with bare, untreated replacements. Buyers report parts that look and fit like factory pieces and that swapping the kit eliminates vibration and harsh noises. Fitment can vary between models, so careful part-number or VIN checks are needed before purchase. Some users found one or two pieces tougher to install than the others and a few reported cosmetic finish issues on peripheral brackets, but the core mounts themselves are generally described as solid replacements that restore engine stability for everyday driving and moderate use.
Best for: A balanced all-round buyer who wants a cost-effective, single-purchase solution to restore engine stability and reduce vibration without overpaying for branded OEM parts.
Less Ideal for: Drivers seeking brand-new factory-quality parts with guaranteed exact cosmetic finish or those unwilling to verify fitment by VIN should consider alternatives or dealer parts.
- Three-piece kit replaces both engine and transmission mounts in one purchase
- Materials treated for temperature and corrosion resistance to improve durability
- Reported fit and compatibility that closely matches factory replacements for many vehicles
- Simple way to eliminate idle vibration and engine movement when fit is correct
- Fitment is not universal and requires VIN or part-number verification before ordering
- Some ancillary bracket pieces show cosmetic or finish flaws on arrival
Verdict A practical, budget-friendly three-piece mount kit that restores engine stability for everyday driving when you confirm correct fitment.
Choosing the Right Lexus IS Engine Mount: Key Factors to Consider
Vibration Damping
Vibration damping is the primary function of an engine mount because it isolates engine motion from the chassis and cabin. Better damping reduces perceptible shake during idle, acceleration, and gear shifts, improving occupant comfort and perceived refinement.
Different mount designs and elastomer compounds absorb motion at different frequencies. A mount that controls mid- and high-frequency vibration will make the car feel smoother without transferring harshness to other components. Consider mounts that specify damping properties or describe multi-density or tuned elements when vibration control is a priority.
Material and Construction
Materials determine how a mount tolerates heat, oil, and long-term fatigue. Quality elastomers, reinforced housings, and corrosion-resistant metal brackets typically last longer in engine bays exposed to temperature swings and fluid exposure.
Look for mounts that describe bonded construction, high-grade rubber or polyurethane formulations, and plated or stainless steel hardware. These construction choices influence lifespan and resistance to cracking, hardening, or interior separation under load.
Fitment and Compatibility
Proper fitment ensures the mount seats correctly and aligns the powertrain as the factory intended. A mount that fits without modification minimizes installation time and reduces the risk of stress on adjacent components.
Check that the mount is specifically designed for the Lexus IS year range and engine variant you have. Clear fitment documentation and matching bolt patterns are important. Mismatched mounts can cause misalignment, premature wear, and unexpected vibration characteristics.
Durability and Longevity
Durability affects how often you will need to replace mounts and how well they withstand real-world conditions. Fatigue resistance, UV and ozone tolerance, and oil resistance all contribute to a mount's lifespan.
Evaluate design features such as reinforced bonding points, wear-resistant bushings, and protective coatings on metal parts. Durable mounts reduce the chance of sudden failure and help maintain consistent vehicle dynamics over time.
Installation and Serviceability
Ease of installation influences labor time and the accuracy of the finished job. Some mounts require engine support, specific torque sequences, or alignment checks during installation to prevent preloading or misalignment.
Consider whether the mount comes with necessary hardware, clear torque values, and whether it can be installed with common shop tools. If special procedures are needed, factor in potential additional labor or the need for professional installation.
Noise and Harshness Tradeoffs
Some stiffer mounts improve engine control under load but transmit more noise and harshness to the cabin. Conversely, softer mounts reduce noise but may allow excessive engine movement during hard acceleration.
Balance this tradeoff based on driving style. If you prioritize a quiet, comfortable ride, choose mounts with softer, tuned damping. If you need firmer engine control for spirited driving, accept some added noise in exchange for reduced powertrain movement.
FAQ
What are common symptoms of a failing engine mount in a Lexus IS?
Common signs include increased vibration at idle, noticeable engine movement during acceleration, and unusual clunks when shifting or engaging reverse. You may also hear amplified engine noise in the cabin. Symptoms often develop gradually but can become more apparent with age or oil contamination of the mount.
Can I replace an engine mount myself?
Many owners can replace a mount with basic mechanical skills and standard tools, but some mounts require supporting the engine and following torque sequences. It usually depends on the mount location and whether engine support points are easily accessible. If you are unsure about alignment or torque specifications, professional help reduces risk of improper installation.
How long do engine mounts typically last?
Mount lifespan varies depending on driving conditions, exposure to oil or heat, and material quality. Under normal driving, mounts often last many years, but high-mileage vehicles or those exposed to leaks and extreme conditions may need replacement sooner. Regular inspections help catch deterioration before failure.
Will a bad engine mount cause engine noise or vibration only at idle?
Not always. While idle vibration is a common early indicator, a failing mount can produce noise and movement under acceleration, deceleration, and during gear changes. Some mounts show symptoms only under certain loads, so testing under different driving conditions helps pinpoint the issue.
Does replacing a mount require any alignment or special checks afterward?
After replacement, it is good practice to verify bolt torque and check that the engine sits correctly in its mounts without preload. In some cases, checking connected systems such as exhaust hangers and drivetrain alignment ensures nothing is under unusual stress. Follow any specified torque values and installation notes for best results.
Are aftermarket mounts different from OEM options?
Aftermarket mounts can vary in material, construction, and intended use compared with factory units. Some aftermarket options emphasize longer life or different damping characteristics. It is useful to review construction details and compatibility notes to ensure the chosen mount matches your priorities for comfort and durability.
How We Chose the Best Lexus IS Engine Mount
We focused on mounts that deliver robust vibration isolation and long-term durability under typical driving conditions for the Lexus IS. Primary evaluation criteria included material and construction quality, measured vibration damping performance, and compatibility with factory mounting points. We also weighed ease of installation and the clarity of fitment guidance, since mount replacement often involves alignment and torque specifications. Durability under heat and oil exposure was assessed conceptually through construction features and material choices. Exclusions: we did not include mounts lacking clear compatibility with the Lexus IS chassis, products with insufficient technical documentation, or items intended only for motorsport or heavy-commercial use. The final shortlist reflects options that balance effective vibration control, proven construction methods, and reasonable installation characteristics for typical owners and independent shops.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize vibration damping, correct fitment, and durable construction when choosing an engine mount for a Lexus IS. Understand the tradeoff between firmer mounts that control engine motion and softer mounts that maximize cabin comfort.Inspect mounting points during service, follow installation torque guidance, and choose a mount that matches your driving priorities to maintain smooth operation and protect drivetrain components.
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