TI-621L
Tie Rod End
At a glance
- OE number
- TI-621L
- Part
- Tie Rod End
- Fitment
- 1989-1997 Daihatsu Applause I Hatchback (A101, A111) / 1997-2000 Daihatsu Applause Ii Hatchback (A101) / 2004-2016 Daihatsu Boon Steering system, Left
- Supply
- Make to order / 1,000 pcs MOQ / 90–120 days
OE Cross-Reference
| OEM Brand | Reference Numbers |
|---|---|
| CTR | |
| FeBest | |
| JAPKO | |
| LYNXauto | |
| MASUMA | |
| OEM | |
| Sidem | |
| SLOOP | |
| Triscan | |
| SLOOP ← ours | TI-621LSLSE-0485 |
Vehicle Fitment
About Tie Rod Ends — function, symptoms & common questions
A tie rod end is the outermost ball-jointed connection in the steering linkage — the wear part that transfers steering motion from the rack (or center link) to the steering knuckle at each front wheel. Every steering system, modern rack-and-pinion or older parallelogram, has tie rod ends; they are one of the highest-volume steering wear items in the global aftermarket.
Also known as: outer tie rod end, steering tie rod end, track rod end (UK/EU), TRE.
How it works
Lateral-to-angular conversion
The steering rack moves left-right in a straight line. The tie rod end converts that lateral push into the angular motion that swings the steering knuckle around its pivot, turning the wheel.
Toe adjustment
The threaded sleeve between the inner and outer tie rod is the front-toe adjuster — turning it lengthens or shortens the linkage, opening or closing toe. All wheel-alignment toe corrections happen at this joint.
Suspension articulation
The ball joint inside the tie rod end allows the steering knuckle to rise and fall with the suspension while still transmitting steering input — without it, the steering would bind through bumps.
Structure and construction
A forged steel housing with an internal ball stud, sealed greased bearing surface and rubber/polyurethane dust boot. The stud has a tapered shaft with a castellated nut and cotter pin (or a self-locking nut) to lock it into the steering knuckle. Thread direction on the rod sleeve is opposite between left and right sides on most vehicles, allowing toe adjustment without disconnecting the joint.
Common failure symptoms
- Clunk over bumps or when turning. Worn ball joint rattling in its socket. Often most audible in low-speed parking-lot maneuvers.
- Vague / loose steering feel. Excessive freeplay at the steering wheel before the front wheels respond — input is being absorbed by the worn joint.
- Inner-edge tire wear. Toe drifts toward toe-out as the worn joint allows the wheel to splay, scrubbing the inner shoulder of the tire.
- Off-center steering wheel after alignment. A worn joint cannot hold the toe setting once load is applied; the alignment "drifts off" within days or weeks.
Common questions about Tie Rod Ends
How often should tie rod ends be replaced?
There is no fixed interval — they are replaced when worn. Typical life is 100,000–150,000 km on paved roads, less on rough or salted roads. Inspect every service: with the wheel off the ground, a good joint has zero perceptible play when the tire is rocked side-to-side.
Can I drive with a worn tie rod end?
Short distances at low speed, yes. A tie rod end that fails completely will result in total loss of steering on that wheel — the wheel will flop free and the vehicle will be undrivable. Replace promptly once a clunk or visible play is detected.
Do tie rod ends always come in pairs?
Not necessarily — left and right are usually sold individually and use opposite-thread rods. However, replacing both sides at the same time is best practice once one shows wear, since the second side will typically fail within a similar timeframe.
Is wheel alignment required after replacement?
Yes. The toe setting is established at the tie-rod sleeve, and any disassembly of the joint changes it. Drive directly to an alignment rack after replacement.
Related Parts
FAQ
Is this an original TOYOTA OEM part?
No. This is an aftermarket replacement manufactured by SLOOP, designed to meet OEM specifications. The OE number TI-621L is referenced under nominative fair use solely to identify vehicle compatibility — it does not imply licensing, endorsement, or affiliation with any vehicle manufacturer.
How do I confirm this part matches OE TI-621L?
Form-fit-function tested against the OEM specification. Material test reports and dimensional drawings are sent with every quote. For high-volume orders we will produce a sample-grade pre-production unit for your QC team's verification before main run.
What certifications and quality standards do you carry?
ISO 9001:2015 quality management, plus REACH / RoHS for EU compliance. Material test reports and PPAP documentation are available on request for tier-1 buyers. Certificates ship with first shipment of every new SKU.
Do you offer samples?
No free samples. Your first order doubles as the qualification batch. We hold the production run until you confirm visual + dimensional inspection from the first carton. If anything is out of spec we re-make at our cost.
Payment terms?
100% T/T (bank wire) before production start. USD only. Bank details and proforma invoice are sent after you accept the quote. No credit terms, no Letters of Credit on first order.
Lead time and shipping?
Production: 90–120 days from confirmed payment. Sea freight 25–40 days from Taiwan port (most common). Air freight available on request for urgent orders. We can quote FOB Taiwan or DDP your warehouse.
What if I need a part you do not list?
Upload your full parts inquiry on the quote page. We match every line we carry and flag the rest for our manufacturing roadmap. Aggregated inquiries directly drive our next production batch.