Lower Control Arm Ball Joint Assembly 8-94459464-0 8944594640 For ISUZU TFR 4x2 D-MAX 4x4 4JA1 — Ø20.6mm Cone, M18×1.5 Thread, Front Lower Both Sides, OEM-Grade

The Lower Control Arm Ball Joint Assembly with OEM references 8-94459464-0 / 8944594640 is a verified direct-fit front suspension component for ISUZU TFR 4x2 and D-MAX 4x4 pickups, as well as related Opel Campo / Frontera and Vauxhall Brava applications. This ball joint is the lower pivot that connects the front lower control arm to the steering knuckle, carrying the vehicle's front corner load while allowing suspension articulation and maintaining correct wheel alignment geometry. It serves both left and right sides in the front lower axle position.

The part is widely cross-referenced under Blue Print ADZ98606, 555 SB-5282, First Line FBJ5286, Quinton Hazell QSJ1321S, ABS 220214, and A.B.S. 220214, with technical data confirming a Ø 20.6 mm stud cone, M18 × 1.5 external thread, 21 mm mounting diameter, and a reference height of 102.5 mm. Reference weight is approximately 1.14–1.27 kg depending on brand and whether a crown nut is included.

• Position Verified: Front Axle, Lower, Both Sides (Left and Right) — confirmed by Blue Print ADZ98606 ("Front Axle Left, Lower, Front Axle Right"), A.B.S. 220214 ("leva přední náprava / pravá přední náprava" = left front axle / right front axle), and 555 SB-5282 ("gauche inférieur, droite inférieur").
• Cone Size Verified: Ø 20.6 mm — confirmed by Blue Print ADZ98606 ("Cone Size: 20.6 mm") and A.B.S. 220214 ("Rozměr kužele [mm]: 20,6"). 555 SB-5282 lists 20.7 mm, a nominal rounding difference consistent with the same 20.6 mm classification.
• Thread Size Verified: M18 × 1.5 — confirmed by Blue Print ADZ98606 ("External Thread Size: M18 x 1,5"), A.B.S. 220214 ("M18X1,5 RHT"), and 555 SB-5282 ("R-M18×1,5").
• Mounting Diameter Verified: 21 mm — confirmed by euautodeler ("monteringsdiameter (mm): 21") and ASHIKA/JAPANPARTS data ("Diamètre de montage [mm]: 21").
• Height Verified: 102.5 mm — confirmed by euautodeler for OEM group 8944594640 / 8944594641 / 8944594642.
• Weight Verified: 1.270 kg (Blue Print, with crown nut); 1.13 kg (555 SB-5282); 1.14 kg (okisuzu); 1.15 kg (Autopart-Masters) — consistent range accounting for brand and hardware inclusion.
• Mounting Hole Diameter Verified: 10.2 mm — confirmed by Blue Print ADZ98606.
• Vehicle & Drive-Type Coverage Verified: ISUZU TFR 4x2 1997–2003 (Euro4x4parts explicit listing); ISUZU D-MAX 4x4 
• OEM / Brand Cross-Reference Density Verified: 8-94459464-0, 8944594640, 8-94459-464-1, 8944594641, 8-94459-464-2, 8944594642, 8-94459-464-3, 8944594643, 94459464, 8979406120, 8-97940-612-0, OPEL 4302209, VAUXHALL 94459464 / 094459464, OSCA 09750 — confirmed across Blue Print, 555, First Line, Quinton Hazell, DEAUTO, and Spareto.
• Crown Nut Inclusion Verified: Blue Print ADZ98606 is supplied "with crown nut" ("avec écrou crénelé" per SWAG reference).
• Factory Number Distinction: 8-94459464-5 is listed by the factory number for the 8944594641 reference, not a different functional part. 8-94459464-0 remains the primary service reference for the lower ball joint assembly.

• Clunking or knocking from the front lower suspension: A worn lower ball joint allows the control arm to shift under load, producing a metallic clunk or knock over bumps, during braking, or when cornering — the most common early symptom on high-mileage TFR/D-MAX pickups.
• Vague or wandering steering: Excessive play in the lower ball joint translates to steering free play and reduced directional stability, especially noticeable at highway speed or under crosswind.
• Uneven or accelerated front tire wear: A worn lower ball joint changes camber and caster angles, causing shoulder wear, cupping, or feathered edges on the front tires.
• Knock on full lock / steering shimmy: A failing lower ball joint can produce a distinct knock when the steering is held at full lock, or a shimmy felt through the steering wheel during braking.
• Visible boot damage or grease loss: A torn or cracked dust boot is the leading cause of accelerated ball joint wear — if the boot is compromised, the joint should be inspected and replaced promptly.
• Wheel alignment that cannot be brought into specification: A ball joint with excessive axial or radial play prevents correct camber/caster adjustment, indicating the joint itself must be replaced.

• Lower vs. upper is the first check: This is the lower ball joint. The upper ball joint for the same platform uses a different OEM reference (e.g., 8-94459453-0 for TFR upper, 8-97235777-0 for D-MAX 4x2 upper) and is not interchangeable. Lower and upper joints have different cone sizes, thread sizes, and load ratings.
• 4x2 vs. 4x4: The 8-94459464-0 series is confirmed for both TFR 4x2 and D-MAX 4x4 applications. However, confirm the vehicle's drive type and VIN before ordering, especially for fleet applications where mixed configurations may exist.  factory data explicitly lists "TFR 4X2 / DMAX 4X4" under the same lower ball joint family.
• OE family: 8-94459464-0, 8944594641, 8944594642, 8944594643 are grouped as interchangeable/related references for the same lower position. 8944594640 is the primary reference in the user's query. Read the original unit's marking where possible.
• Opel / Vauxhall cross-brand coverage: The same ball joint is used on Opel Campo and Frontera platforms, making this a cross-brand SKU for distributors serving both ISUZU and GM/Opel vehicle populations.
• Alignment is mandatory: After replacing any front suspension ball joint, a professional wheel alignment is required to restore camber, caster, and toe settings.

1. Confirm lower position and drive type first: Verify that the original unit is the lower ball joint (not upper), and confirm the vehicle's drive type (4x2 / 4x4). Compare the cone size (Ø20.6 mm) and thread (M18×1.5) to the original unit.
2. Safety first: Park on level ground, engage parking brake, chock rear wheels. Loosen the front wheel lug nuts before raising the vehicle. Support the front corner securely on jack stands.
3. Support the lower control arm: Place a jack under the lower control arm to relieve tension on the ball joint before removal.
4. Separate the ball joint from the knuckle: Remove the cotter pin and crown nut. Use a ball joint separator to press the stud out of the knuckle. Do not hammer on the knuckle or ball joint housing — this can damage the taper or crack the knuckle.
5. Remove the ball joint from the control arm: The joint may be press-fit or bolt/rivet-in. Use the appropriate press tool or remove the fasteners. Note the orientation for reassembly.
6. Clean the mating surfaces: Remove all dirt, rust, and old thread-locking compound from the control arm and knuckle tapers. A clean taper is essential for a secure fit.
7. Install the new ball joint: Press or bolt the new 8-94459464-0 ball joint into the control arm. Do not grease the taper unless specified by the workshop manual.
8. Reconnect to the knuckle: Insert the stud into the knuckle taper, install the crown nut, and torque to the workshop manual specification. Install a new cotter pin.
9. Grease the joint (if equipped with a grease fitting): Use the specified chassis grease until fresh grease purges from the boot. Do not over-grease — excessive pressure can rupture the boot.
10. Professional wheel alignment: Mandatory after ball joint replacement. Camber, caster, and toe must be reset to specification.
11. Road test: Test drive at low speed, listening for abnormal noise and checking for steering pull or vibration before returning the vehicle to service.

• Inspect lower ball joint boots at every suspension service or every 20,000–30,000 km — a torn boot is the leading cause of premature ball joint failure.
• Check for play by raising the front wheel and attempting to rock the tire at the 12 and 6 o'clock positions. Any detectable play warrants replacement.
• Grease the joint (if equipped with a fitting) at every oil change or according to the ISUZU maintenance schedule.
• Replace in pairs when possible: If one lower ball joint has failed, the opposite side is likely at a similar wear stage. Replacing both simultaneously maintains balanced suspension performance.

• Standard packing: Neutral carton with protective wrapping; customer-branded packaging available on request. Reference packaging size: 13 × 10 × 11 cm / 13 × 11 × 8 cm .
• Package contents: 1 × Lower Control Arm Ball Joint Assembly. Crown nut included in some brands (Blue Print reference includes crown nut) — confirm inclusion at inquiry. Cotter pin and mounting hardware may or may not be included.
• Set options: Single ball joint / front lower pair (left + right) — specify at inquiry.
• Suitable for: ISUZU TFR/D-MAX suspension repair shops, Opel Campo/Frontera service providers, light commercial and SUV fleet maintenance departments, spare parts distributors, and export wholesalers serving Southeast Asia, the Middle East, Africa, Latin America, and Europe.
• Related parts available: Upper ball joint (8-94459453-0 for TFR upper / 8-97235777-0 for D-MAX 4x2 upper), lower control arm, upper control arm, tie rod ends, and complete TFR/D-MAX front suspension rebuild kits.