Replacement Tesla Model 3 / Model Y rear upper aft link assembly (25×19 lateral arm).
This tubular control arm sits in the upper-rearward position of the rear multi-link suspension and locates the wheel laterally while contributing to rear camber and toe control. Worn bushings or damaged arms can cause rear-end instability, clunks, and irregular tire wear. This arm is a direct-fit replacement for Tesla part number 1188423-00-A on most Model 3 and Model Y variants.
Built using Delphi OE safety technology, this suspension arm is engineered and tested to OE-level standards:
Validated from below −40 °C to over 120 °C, subjected to up to 720 hours of salt spray, and checked with extensive dimensional and material analysis to ensure excellent compatibility with the original Tesla part. Delphi arms are crack-checked and inspected using ultrasonic flaw detection for consistent strength and durability.
| PN | Tesla PN 1188423-00-A (Rear upper aft link assembly — 25×19 lateral arm) |
| OEM description (reference) | REAR UPPER AFT LINK ASSEMBLY — 25×19 • Rear upper rearward lateral arm for Model 3 / Model Y rear suspension. |
| Application | Tesla Model 3 (approx. Jun 2017+ variants) and Tesla Model Y (most 2020+ variants) • rear suspension • rear upper rearward lateral arm (aft link) for vehicles equipped with Tesla PN 1188423-00-A. |
| Includes | Complete rear upper aft link assembly with pre-installed rubber bushings and forked mounting end. Mounting hardware is not included; reuse or replace bolts/nuts as needed during service. |
| Condition / grade | New standard replacement Delphi lateral arm built to OE-style specifications. Non-greasable design with sealed rubber bushings (no ball joint). |
| Key dimensions (approx.) | Length: 10.059 in (255.50 mm) • Bushing length: 1.890 in (48.00 mm) • Mounting hole diameters: 0.559–0.563 in (14.20–14.30 mm). |
| Construction & shape | Construction: Tubular • Shape: Straight • End 1 type: Bushing • End 2 type: Fork. |
| Materials & finish | Arm material: Steel • Bushing material: Rubber • Color: Black • Sheen level: Matte • Finish: Painted. |
| Joints, bushings & lubrication | Bushings included: Yes • Pre-greased: No • Grease fittings included: No • Ball joint included: No • Dust boot included: No • Adjustable: No • Greasable: No. |
| Hardware & interface | Mounting hardware included: No • Typical wrench size (for associated hardware): varies by installation (refer to Tesla service documentation) • Designed to accept OEM bolts through 14.20–14.30 mm mounting holes. |
| Position | Rear Upper Rearward (aft lateral arm in the rear suspension assembly). Typically one per side; verify orientation and side-specific usage per your vehicle’s configuration. |
| Compatibility notes | Tesla has used multiple rear suspension arm revisions on Model 3 / Model Y. Always match the part number stamped on your original rear upper aft link (1188423-00-A) and verify by VIN/build date. Front and rear arms are not interchangeable, and rear links/arms each serve specific positions (upper, lower, forward, rearward). Contact us if you need help confirming fitment before ordering. |
Any time a rear suspension arm is replaced, a four-wheel alignment is strongly recommended to restore proper camber and toe settings and protect your rear tires from premature wear. After installation, road test over a variety of surfaces and speeds, checking for noise and confirming that the vehicle tracks straight. Inspect adjacent links, bushings, and shocks at the same time so you can address other worn components while the area is accessible.
Not sure if your Model 3 or Model Y uses this exact rear upper aft link? Check the part number stamped on the original arm or provide your VIN, model year, and build date. We can help confirm that this 1188423-00-A assembly is the correct match for your vehicle before you order.
