Recall 17V604 affects 9 2018 Polar Tank SRJ7 Trailer vehicles for loose brake caliper bolts. Repair is free through Polar Tank instructions and Meritor reimbursement.
Polar Tank is recalling 9 2018 SRJ7 Trailer units under recall 17V604 because improperly torqued brake caliper bolts on Meritor MTA/MTP trailer suspensions can let a caliper detach from its mounting flange. A detached caliper can cause loss of braking ability and increase crash risk; Polar Tank dealers will complete the free repair.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The 2018 Polar Tank SRJ7 Trailer uses Meritor MTA/MTP trailer suspensions with air disc brake calipers at the axle. A caliper is the brake part that squeezes the brake pads against the rotor when air pressure tells the brake system to slow the trailer. Its mounting bolts hold that caliper tight to the axle mounting flange, the fixed surface that keeps the brake lined up with the rotor.
On affected trailers, the caliper bolts were not tightened correctly at Meritor's Frankfort manufacturing facility. Loose or missing bolts let the caliper move instead of staying fixed. If the bolts back out far enough, the caliper can detach from the mounting flange and the brake at that wheel no longer works as designed.
There is no warning sign before failure. Because the issue is in the caliper mounting hardware, an owner or driver is not given a normal dashboard light or pedal change that reliably points to the loose bolts before the caliper comes off.
Who's affected?
| 2018 Polar Tank SRJ7 Trailer | brake system |
|---|---|
| Units affected | 9 |
| Field incidents | NHTSA has logged no field incidents to date. |
Not every 2018 Polar Tank SRJ7 Trailer is on the list. Check your VIN to confirm whether your specific trailer is included.
What's the safety risk?
Improperly torqued brake caliper bolts can let the caliper detach from its mounting flange. If that happens, braking ability is lost and crash risk increases. Until the bolts are checked under Polar Tank's bulletin, drive cautiously and arrange service promptly. Repair is free at any franchised Polar Tank dealer.
What should I do?
- Check your VIN to confirm your 2018 Polar Tank SRJ7 Trailer is included in this recall.
- Contact Polar Tank customer service at 1-320-746-2255 for the brake-caliper bolt bulletin and repair instructions.
- Schedule the brake-caliper bolt inspection and torque repair that keeps the caliper secured to the mounting flange.
- Bring the owner notice to the service appointment, and reference recall number 17V604 and Polar Tank recall C17AB when you call.
- Ask Polar Tank how the Meritor reimbursement applies before the work starts.
What happens at the repair
At the dealer, a Polar Tank technician checks the Meritor MTA or MTP trailer suspension brake caliper bolts against the supplied bulletin and torques any loose bolts to specification so the caliper stays secured to the mounting flange. The recall repair is free. Meritor's technical bulletin describes the repair and reimbursement process, and Polar notified owners to follow that bulletin. If you already paid for this caliper bolt work, keep the repair paperwork and contact Polar customer service or Meritor to request reimbursement under the bulletin.
| Reimbursement | Reimbursement available |
|---|
Timeline
| September 27, 2017 | NHTSA published the recall |
|---|---|
| October 4, 2017 | Owner notification mailed |
| October 4, 2017 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| October 4, 2017 | Interim owner notification (was planned for this date) |
| November 8, 2017 | Dealer notification ended |
Frequently asked questions
What is recall 17V604?
Recall 17V604 covers 9 2018 Polar Tank SRJ7 Trailer units with Meritor MTA or MTP trailer suspensions. The brake caliper bolts were not properly torqued, which can let the caliper detach from the mounting flange and cause a loss of braking ability.
What should I do if my 2018 Polar Tank SRJ7 Trailer is on this recall?
Check your VIN to confirm your specific trailer is included in recall 17V604. If it is, follow Polar Tank's supplied bulletin for checking the brake caliper bolts, and reference Polar Tank recall number C17AB when you contact Polar Tank or Meritor.
Is the recall repair free?
Yes. Polar Tank's remedy directs owners to check the caliper bolts under the supplied bulletin, with reimbursement from Meritor. Contact Polar Tank customer service or Meritor before the work if you need the current reimbursement instructions for recall 17V604.
What is the safety risk?
The safety risk is loss of braking ability. If the brake caliper bolts are not properly torqued and the caliper detaches from the mounting flange, braking performance is reduced and crash risk increases. The recall remedy focuses on checking the caliper bolts.
What if I already paid for brake caliper bolt work on my SRJ7 Trailer?
Ask Polar Tank or Meritor about reimbursement for documented work related to this recall. Polar Tank's remedy says owners receive reimbursement from Meritor after checking the caliper bolts under the supplied bulletin. Reference recall 17V604 and Polar Tank recall number C17AB.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/17V604000 |
|---|---|
| Polar Tank customer service | 1-320-746-2255 |
| NHTSA recall # | 17V604 |
| NHTSA recall # (full) | 17V604000 |
Source documents
-
Download Owner Notification Letter (PDF) - Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →