2004 Kenworth T800 problems, complaints & recalls
Most-reported problem areas: Vehicle Speed Control (1) · Electrical System (1)
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (16)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-10-13 · 42-070 · Service Bulletin/Repair Instructions
due to supplier constraints, an authorized aftermarket surge tank has been made available.
Engine 2026-09-11 · P001 · Service Bulletin/Repair Instructions
"kenworth: dealers should check the chassis list and sir weekly for vin changes. 2 chassis added to the chassis list. peterbilt: dealers should check the chassis list and sir weekly for vin changes. 10 chassis added to the chassis list."
Visibility:windshield Wiper/Washer 2021-02-10 · 02-160 · Service Bulletin/Repair Instructions
information only â windshield washer pumps have a high no trouble found rate. washer pumps may fail to spray due to a clogged filter.
Equipment:appliance:air Conditioner 2020-12-20 · DOR-W5T2V-01 · Service Bulletin/Repair Instructions
this sku is a climate control module. the customer communication requested return of unsold inventory to inspect alignment pins and knobs. the alignment pins may be weak which cause them to break and knob material may be weak which could cause them to break. breaking of the alignment pins or knob
Electrical System 2020-06-08 · 32-015 · Service Bulletin/Repair Instructions
information only: this bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
Equipment 2020-03-17 · 32-016 · Service Bulletin/Repair Instructions
information only: proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
Showing the 6 most recent of 16 bulletins. Search all of them free at nhtsa.gov.
What owners report
2011-06-02 · Unknown Or Other · 🔥 fire“2004 kenworth t800, unit 1 was traveling east on the ohio turnpike on the right shoulder in the construction zone. unit 1 stated she smelled smoke coming from underneath the glove box area. unit 1 stopped and got out of the vehicle. unit 1 became engulfed and was put out by water truck in the construction zone. *bf (ohio traffic crash report …”
2011-04-29 · Electrical System · 240,000 mi · 🔥 fire“tl*the contact owns a 2004 kenworth t800b truck. the contact stated the gear was in the park position with the engine in operation when she exited the vehicle. the contact noticed flames emitting from the instrument panel upon entering the vehicle. the fire department extinguished the flames. the vehicle was towed to an authorized dealer. the cause…”
2005-04-21 · Vehicle Speed Control · 70,000 mi · 💥 crash“sudden full uncontrolled acceleration brought on by a rear end collision while my vehicle was stopped in traffic. dump truck with allison automatic transmission. transmission tower buttons were unresponsive and truck was estimated by witness to jump to almost immediate 60 plus. did not stop until key was removed. virginia dot inspection approx. 2…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.