TSB: MACK ASET, CH, CHK SERIES, CHU, CL, CLASS 6, CLASS 7, CLASS 8, CRD SERIES, CRD112/113, CRD200, CRD92/93, CS 300, CS 300P, CS SERIES, CV, CX, CXU, DM, DM SERIES, DM400, DM600, DM807, DM809, DM811, DMM SERIES, E6, E7, F SERIES, FDM, FREEDOM, GU, J-TECH, LE, LR, M35AK, M65BX, MACK, MB SERIES, MC400, MC600, MH, MIDLINER, MIDR, MR, MR SERIES, MR400, MR600, MS SERIES, MS200P, MS300, MS300P, R, RB, RD, RD SERIES, RM SERIES, RW SERIES, SR70, T200, T2060A, T2090L, T2090LR, T300, TD, U, V-MAC, V-MAC III, WL, WS

Bulletin K93039325 — January 2, 2018

Bulletin Details

Bulletin IDK93039325
ManufacturerMACK
ModelsASET, CH, CHK SERIES, CHU, CL, CLASS 6, CLASS 7, CLASS 8, CRD SERIES, CRD112/113, CRD200, CRD92/93, CS 300, CS 300P, CS SERIES, CV, CX, CXU, DM, DM SERIES, DM400, DM600, DM807, DM809, DM811, DMM SERIES, E6, E7, F SERIES, FDM, FREEDOM, GU, J-TECH, LE, LR, M35AK, M65BX, MACK, MB SERIES, MC400, MC600, MH, MIDLINER, MIDR, MR, MR SERIES, MR400, MR600, MS SERIES, MS200P, MS300, MS300P, R, RB, RD, RD SERIES, RM SERIES, RW SERIES, SR70, T200, T2060A, T2090L, T2090LR, T300, TD, U, V-MAC, V-MAC III, WL, WS
Date IssuedJanuary 2, 2018
Date Added to NHTSAMarch 12, 2018
ComponentFUEL SYSTEM, GASOLINE
Vehicles Affected140 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Mack Chassis - Diesel Exhaust Fluid ( DEF ) Contamination In Fuel System, Inspection And Repair - US10 And Newer; Includes US17 Chassis (GHG17 Only document in development)

Affected Vehicles

MakeModelYearComponent
MACK ASET 070000 FUEL SYSTEM, GASOLINE
MACK ASET 080000 FUEL SYSTEM, DIESEL
MACK CH 070000 FUEL SYSTEM, GASOLINE
MACK CH 080000 FUEL SYSTEM, DIESEL
MACK CHK SERIES 070000 FUEL SYSTEM, GASOLINE
MACK CHK SERIES 080000 FUEL SYSTEM, DIESEL
MACK CHU 070000 FUEL SYSTEM, GASOLINE
MACK CHU 080000 FUEL SYSTEM, DIESEL
MACK CL 070000 FUEL SYSTEM, GASOLINE
MACK CL 080000 FUEL SYSTEM, DIESEL
MACK CLASS 6 070000 FUEL SYSTEM, GASOLINE
MACK CLASS 6 080000 FUEL SYSTEM, DIESEL
MACK CLASS 7 070000 FUEL SYSTEM, GASOLINE
MACK CLASS 7 080000 FUEL SYSTEM, DIESEL
MACK CLASS 8 070000 FUEL SYSTEM, GASOLINE
MACK CLASS 8 080000 FUEL SYSTEM, DIESEL
MACK CRD SERIES 070000 FUEL SYSTEM, GASOLINE
MACK CRD SERIES 080000 FUEL SYSTEM, DIESEL
MACK CRD112/113 070000 FUEL SYSTEM, GASOLINE
MACK CRD112/113 080000 FUEL SYSTEM, DIESEL
MACK CRD200 070000 FUEL SYSTEM, GASOLINE
MACK CRD200 080000 FUEL SYSTEM, DIESEL
MACK CRD92/93 070000 FUEL SYSTEM, GASOLINE
MACK CRD92/93 080000 FUEL SYSTEM, DIESEL
MACK CS 300 070000 FUEL SYSTEM, GASOLINE
MACK CS 300 080000 FUEL SYSTEM, DIESEL
MACK CS 300P 070000 FUEL SYSTEM, GASOLINE
MACK CS 300P 080000 FUEL SYSTEM, DIESEL
MACK CS SERIES 070000 FUEL SYSTEM, GASOLINE
MACK CS SERIES 080000 FUEL SYSTEM, DIESEL
MACK CV 070000 FUEL SYSTEM, GASOLINE
MACK CV 080000 FUEL SYSTEM, DIESEL
MACK CX 070000 FUEL SYSTEM, GASOLINE
MACK CX 080000 FUEL SYSTEM, DIESEL
MACK CXU 070000 FUEL SYSTEM, GASOLINE
MACK CXU 080000 FUEL SYSTEM, DIESEL
MACK DM 070000 FUEL SYSTEM, GASOLINE
MACK DM 080000 FUEL SYSTEM, DIESEL
MACK DM SERIES 070000 FUEL SYSTEM, GASOLINE
MACK DM SERIES 080000 FUEL SYSTEM, DIESEL
MACK DM400 070000 FUEL SYSTEM, GASOLINE
MACK DM400 080000 FUEL SYSTEM, DIESEL
MACK DM600 070000 FUEL SYSTEM, GASOLINE
MACK DM600 080000 FUEL SYSTEM, DIESEL
MACK DM807 070000 FUEL SYSTEM, GASOLINE
MACK DM807 080000 FUEL SYSTEM, DIESEL
MACK DM809 070000 FUEL SYSTEM, GASOLINE
MACK DM809 080000 FUEL SYSTEM, DIESEL
MACK DM811 070000 FUEL SYSTEM, GASOLINE
MACK DM811 080000 FUEL SYSTEM, DIESEL
MACK DMM SERIES 070000 FUEL SYSTEM, GASOLINE
MACK DMM SERIES 080000 FUEL SYSTEM, DIESEL
MACK E6 070000 FUEL SYSTEM, GASOLINE
MACK E6 080000 FUEL SYSTEM, DIESEL
MACK E7 070000 FUEL SYSTEM, GASOLINE
MACK E7 080000 FUEL SYSTEM, DIESEL
MACK F SERIES 070000 FUEL SYSTEM, GASOLINE
MACK F SERIES 080000 FUEL SYSTEM, DIESEL
MACK FDM 070000 FUEL SYSTEM, GASOLINE
MACK FDM 080000 FUEL SYSTEM, DIESEL
MACK FREEDOM 070000 FUEL SYSTEM, GASOLINE
MACK FREEDOM 080000 FUEL SYSTEM, DIESEL
MACK GU 070000 FUEL SYSTEM, GASOLINE
MACK GU 080000 FUEL SYSTEM, DIESEL
MACK J-TECH 070000 FUEL SYSTEM, GASOLINE
MACK J-TECH 080000 FUEL SYSTEM, DIESEL
MACK LE 070000 FUEL SYSTEM, GASOLINE
MACK LE 080000 FUEL SYSTEM, DIESEL
MACK LR 070000 FUEL SYSTEM, GASOLINE
MACK LR 080000 FUEL SYSTEM, DIESEL
MACK M35AK 070000 FUEL SYSTEM, GASOLINE
MACK M35AK 080000 FUEL SYSTEM, DIESEL
MACK M65BX 070000 FUEL SYSTEM, GASOLINE
MACK M65BX 080000 FUEL SYSTEM, DIESEL
MACK MACK 070000 FUEL SYSTEM, GASOLINE
MACK MACK 080000 FUEL SYSTEM, DIESEL
MACK MB SERIES 070000 FUEL SYSTEM, GASOLINE
MACK MB SERIES 080000 FUEL SYSTEM, DIESEL
MACK MC400 070000 FUEL SYSTEM, GASOLINE
MACK MC400 080000 FUEL SYSTEM, DIESEL
MACK MC600 070000 FUEL SYSTEM, GASOLINE
MACK MC600 080000 FUEL SYSTEM, DIESEL
MACK MH 070000 FUEL SYSTEM, GASOLINE
MACK MH 080000 FUEL SYSTEM, DIESEL
MACK MIDLINER 070000 FUEL SYSTEM, GASOLINE
MACK MIDLINER 080000 FUEL SYSTEM, DIESEL
MACK MIDR 070000 FUEL SYSTEM, GASOLINE
MACK MIDR 080000 FUEL SYSTEM, DIESEL
MACK MR 070000 FUEL SYSTEM, GASOLINE
MACK MR 080000 FUEL SYSTEM, DIESEL
MACK MR SERIES 070000 FUEL SYSTEM, GASOLINE
MACK MR SERIES 080000 FUEL SYSTEM, DIESEL
MACK MR400 070000 FUEL SYSTEM, GASOLINE
MACK MR400 080000 FUEL SYSTEM, DIESEL
MACK MR600 070000 FUEL SYSTEM, GASOLINE
MACK MR600 080000 FUEL SYSTEM, DIESEL
MACK MS SERIES 070000 FUEL SYSTEM, GASOLINE
MACK MS SERIES 080000 FUEL SYSTEM, DIESEL
MACK MS200P 070000 FUEL SYSTEM, GASOLINE
MACK MS200P 080000 FUEL SYSTEM, DIESEL
MACK MS300 070000 FUEL SYSTEM, GASOLINE
MACK MS300 080000 FUEL SYSTEM, DIESEL
MACK MS300P 070000 FUEL SYSTEM, GASOLINE
MACK MS300P 080000 FUEL SYSTEM, DIESEL
MACK R 070000 FUEL SYSTEM, GASOLINE
MACK R 080000 FUEL SYSTEM, DIESEL
MACK RB 070000 FUEL SYSTEM, GASOLINE
MACK RB 080000 FUEL SYSTEM, DIESEL
MACK RD 070000 FUEL SYSTEM, GASOLINE
MACK RD 080000 FUEL SYSTEM, DIESEL
MACK RD SERIES 070000 FUEL SYSTEM, GASOLINE
MACK RD SERIES 080000 FUEL SYSTEM, DIESEL
MACK RM SERIES 070000 FUEL SYSTEM, GASOLINE
MACK RM SERIES 080000 FUEL SYSTEM, DIESEL
MACK RW SERIES 070000 FUEL SYSTEM, GASOLINE
MACK RW SERIES 080000 FUEL SYSTEM, DIESEL
MACK SR70 070000 FUEL SYSTEM, GASOLINE
MACK SR70 080000 FUEL SYSTEM, DIESEL
MACK T200 070000 FUEL SYSTEM, GASOLINE
MACK T200 080000 FUEL SYSTEM, DIESEL
MACK T2060A 070000 FUEL SYSTEM, GASOLINE
MACK T2060A 080000 FUEL SYSTEM, DIESEL
MACK T2090L 070000 FUEL SYSTEM, GASOLINE
MACK T2090L 080000 FUEL SYSTEM, DIESEL
MACK T2090LR 070000 FUEL SYSTEM, GASOLINE
MACK T2090LR 080000 FUEL SYSTEM, DIESEL
MACK T300 070000 FUEL SYSTEM, GASOLINE
MACK T300 080000 FUEL SYSTEM, DIESEL
MACK TD 070000 FUEL SYSTEM, GASOLINE
MACK TD 080000 FUEL SYSTEM, DIESEL
MACK U 070000 FUEL SYSTEM, GASOLINE
MACK U 080000 FUEL SYSTEM, DIESEL
MACK V-MAC 070000 FUEL SYSTEM, GASOLINE
MACK V-MAC 080000 FUEL SYSTEM, DIESEL
MACK V-MAC III 070000 FUEL SYSTEM, GASOLINE
MACK V-MAC III 080000 FUEL SYSTEM, DIESEL
MACK WL 070000 FUEL SYSTEM, GASOLINE
MACK WL 080000 FUEL SYSTEM, DIESEL
MACK WS 070000 FUEL SYSTEM, GASOLINE
MACK WS 080000 FUEL SYSTEM, DIESEL

Related MACK Recalls

CampaignModelYearComponentSummary
ANTHEM AN (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
ANTHEM AN (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2025 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2026 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...
PIONEER PR (4) 2027 SERVICE BRAKES, AIR:ANTILOCK:CONTROL ... Mack Trucks, Inc. (Mack) is recalling certain 2025-2027 Pioneer (4) and 2026-...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MACK dealer. Bring this bulletin ID (K93039325) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.