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OE Quality
60-Day Returns
WestarPart #: ST-3966
Westar ST-3966 Coil Spring Insulator - Rear Upper
⚙️ 22 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$28.77Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford and Mercury, Tempo and Topaz
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Coil Spring Insulator options
Westar ST-3966 Coil Spring Insulator - Rear Upper
| Brand | Westar |
| Part Number | ST-3966 |
| Bullet 1 | Provides a pivot point for the suspension to rotate on, to allow |
| Bullet 2 | Provides a locking mechanism to lock the strut and body together |
| Bullet 3 | Provides a noise dampening system to prevent noise and vibrations |
This part fits 22 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1994 | Ford | Tempo | Rear Upper | |
| 1994 | Mercury | Topaz | Rear Upper | |
| 1993 | Ford | Tempo | Rear Upper | |
| 1993 | Mercury | Topaz | Rear Upper | |
| 1992 | Ford | Tempo | Rear Upper | |
| 1992 | Mercury | Topaz | Rear Upper | |
| 1991 | Ford | Tempo | Rear Upper | |
| 1991 | Mercury | Topaz | Rear Upper | |
| 1990 | Ford | Tempo | Rear Upper | |
| 1990 | Mercury | Topaz | Rear Upper | |
| 1989 | Ford | Tempo | Rear Upper | |
| 1989 | Mercury | Topaz | Rear Upper | |
| 1988 | Ford | Tempo | Rear Upper | |
| 1988 | Mercury | Topaz | Rear Upper | |
| 1987 | Ford | Tempo | Rear Upper | |
| 1987 | Mercury | Topaz | Rear Upper | |
| 1986 | Ford | Tempo | Rear Upper | |
| 1986 | Mercury | Topaz | Rear Upper | |
| 1985 | Ford | Tempo | Rear Upper | |
| 1985 | Mercury | Topaz | Rear Upper | |
| 1984 | Ford | Tempo | Rear Upper | |
| 1984 | Mercury | Topaz | Rear Upper |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
703966
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.